/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:11:44,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:11:44,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:11:44,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:11:44,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:11:44,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:11:44,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:11:44,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:11:44,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:11:44,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:11:44,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:11:44,637 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:11:44,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:11:44,637 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:11:44,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:11:44,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:11:44,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:11:44,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:11:44,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:11:44,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:11:44,639 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:11:44,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:11:44,639 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:11:44,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:11:44,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:11:44,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:11:44,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:11:44,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:11:44,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:11:44,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:11:44,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:11:44,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:11:44,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:11:44,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:11:44,640 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:11:44,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:11:44,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:11:44,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:11:44,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:11:44,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:11:44,905 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:11:44,906 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:11:44,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-trans.wvr.bpl [2021-06-05 22:11:44,907 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-trans.wvr.bpl' [2021-06-05 22:11:45,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:11:45,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:11:45,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:11:45,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:11:45,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:11:45,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:11:45,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:11:45,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:11:45,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:11:45,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... [2021-06-05 22:11:45,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:11:45,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:11:45,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:11:45,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:11:45,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:11:45,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:11:45,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:11:45,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:11:45,179 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:11:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:11:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:11:45,179 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:11:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:11:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:11:45,179 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:11:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:11:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:11:45,180 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:11:45,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:11:45,828 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 22:11:45,829 INFO L202 PluginConnector]: Adding new model poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:11:45 BoogieIcfgContainer [2021-06-05 22:11:45,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:11:45,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:11:45,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:11:45,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:11:45,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:11:45" (1/2) ... [2021-06-05 22:11:45,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44385d60 and model type poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:11:45, skipping insertion in model container [2021-06-05 22:11:45,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:11:45" (2/2) ... [2021-06-05 22:11:45,838 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-trans.wvr.bpl [2021-06-05 22:11:45,841 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:11:45,842 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:11:45,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:11:45,843 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:11:45,884 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 22:11:45,900 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 22:11:45,919 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:11:45,919 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:11:45,919 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:11:45,920 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:11:45,920 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:11:45,920 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:11:45,920 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:11:45,920 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:11:45,925 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 37 transitions, 98 flow [2021-06-05 22:11:45,941 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 191 states, 189 states have (on average 4.455026455026455) internal successors, (842), 190 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 189 states have (on average 4.455026455026455) internal successors, (842), 190 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:11:45,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:45,950 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:45,951 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2024028845, now seen corresponding path program 1 times [2021-06-05 22:11:45,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:45,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295544211] [2021-06-05 22:11:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:46,591 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-06-05 22:11:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:46,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:46,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295544211] [2021-06-05 22:11:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295544211] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:46,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:46,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:46,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182245215] [2021-06-05 22:11:46,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:46,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:46,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:46,636 INFO L87 Difference]: Start difference. First operand has 191 states, 189 states have (on average 4.455026455026455) internal successors, (842), 190 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:46,960 INFO L93 Difference]: Finished difference Result 338 states and 1278 transitions. [2021-06-05 22:11:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:11:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:46,990 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:11:46,995 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:11:46,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:11:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 204. [2021-06-05 22:11:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 4.394088669950739) internal successors, (892), 203 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 892 transitions. [2021-06-05 22:11:47,037 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 892 transitions. Word has length 14 [2021-06-05 22:11:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:47,037 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 892 transitions. [2021-06-05 22:11:47,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 892 transitions. [2021-06-05 22:11:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:11:47,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:47,039 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:47,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:11:47,039 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1233644461, now seen corresponding path program 2 times [2021-06-05 22:11:47,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:47,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596598382] [2021-06-05 22:11:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:47,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:47,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596598382] [2021-06-05 22:11:47,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596598382] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:47,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:47,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:47,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150212782] [2021-06-05 22:11:47,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:47,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:47,264 INFO L87 Difference]: Start difference. First operand 204 states and 892 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:47,571 INFO L93 Difference]: Finished difference Result 330 states and 1247 transitions. [2021-06-05 22:11:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:11:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:47,576 INFO L225 Difference]: With dead ends: 330 [2021-06-05 22:11:47,576 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 22:11:47,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 22:11:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 212. [2021-06-05 22:11:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 4.322274881516588) internal successors, (912), 211 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 912 transitions. [2021-06-05 22:11:47,588 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 912 transitions. Word has length 14 [2021-06-05 22:11:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:47,588 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 912 transitions. [2021-06-05 22:11:47,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 912 transitions. [2021-06-05 22:11:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:11:47,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:47,590 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:47,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:11:47,590 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:47,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1840634711, now seen corresponding path program 3 times [2021-06-05 22:11:47,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:47,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566757112] [2021-06-05 22:11:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:47,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:47,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566757112] [2021-06-05 22:11:47,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566757112] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:47,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:47,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:47,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821990232] [2021-06-05 22:11:47,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:47,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:47,835 INFO L87 Difference]: Start difference. First operand 212 states and 912 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:48,118 INFO L93 Difference]: Finished difference Result 378 states and 1427 transitions. [2021-06-05 22:11:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:11:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:48,123 INFO L225 Difference]: With dead ends: 378 [2021-06-05 22:11:48,123 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 22:11:48,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 22:11:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 219. [2021-06-05 22:11:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 4.330275229357798) internal successors, (944), 218 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 944 transitions. [2021-06-05 22:11:48,134 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 944 transitions. Word has length 14 [2021-06-05 22:11:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:48,134 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 944 transitions. [2021-06-05 22:11:48,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 944 transitions. [2021-06-05 22:11:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:11:48,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:48,136 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:48,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:11:48,136 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:48,136 INFO L82 PathProgramCache]: Analyzing trace with hash -867555397, now seen corresponding path program 4 times [2021-06-05 22:11:48,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:48,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768519187] [2021-06-05 22:11:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:48,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:48,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768519187] [2021-06-05 22:11:48,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768519187] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:48,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:48,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:48,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512414494] [2021-06-05 22:11:48,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:48,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:48,317 INFO L87 Difference]: Start difference. First operand 219 states and 944 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:48,602 INFO L93 Difference]: Finished difference Result 369 states and 1403 transitions. [2021-06-05 22:11:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:48,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:11:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:48,605 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:11:48,605 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 22:11:48,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 22:11:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 231. [2021-06-05 22:11:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 4.243478260869566) internal successors, (976), 230 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 976 transitions. [2021-06-05 22:11:48,614 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 976 transitions. Word has length 14 [2021-06-05 22:11:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:48,614 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 976 transitions. [2021-06-05 22:11:48,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 976 transitions. [2021-06-05 22:11:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:11:48,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:48,615 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:48,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:11:48,616 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash 922889575, now seen corresponding path program 5 times [2021-06-05 22:11:48,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:48,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947919669] [2021-06-05 22:11:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:48,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:48,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947919669] [2021-06-05 22:11:48,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947919669] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:48,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:48,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:48,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897342086] [2021-06-05 22:11:48,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:48,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:48,788 INFO L87 Difference]: Start difference. First operand 231 states and 976 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,051 INFO L93 Difference]: Finished difference Result 348 states and 1312 transitions. [2021-06-05 22:11:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:11:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,054 INFO L225 Difference]: With dead ends: 348 [2021-06-05 22:11:49,054 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 22:11:49,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 22:11:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 233. [2021-06-05 22:11:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 4.262931034482759) internal successors, (989), 232 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 989 transitions. [2021-06-05 22:11:49,061 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 989 transitions. Word has length 14 [2021-06-05 22:11:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,061 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 989 transitions. [2021-06-05 22:11:49,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 989 transitions. [2021-06-05 22:11:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:11:49,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,062 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:11:49,062 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash 594755113, now seen corresponding path program 6 times [2021-06-05 22:11:49,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768934047] [2021-06-05 22:11:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,353 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 22:11:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:49,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768934047] [2021-06-05 22:11:49,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768934047] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:49,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:49,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:49,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346452434] [2021-06-05 22:11:49,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:49,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:49,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:49,376 INFO L87 Difference]: Start difference. First operand 233 states and 989 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,676 INFO L93 Difference]: Finished difference Result 358 states and 1349 transitions. [2021-06-05 22:11:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:11:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,678 INFO L225 Difference]: With dead ends: 358 [2021-06-05 22:11:49,679 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 22:11:49,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 22:11:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 233. [2021-06-05 22:11:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 4.262931034482759) internal successors, (989), 232 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 989 transitions. [2021-06-05 22:11:49,685 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 989 transitions. Word has length 14 [2021-06-05 22:11:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,685 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 989 transitions. [2021-06-05 22:11:49,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 989 transitions. [2021-06-05 22:11:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:11:49,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,686 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 22:11:49,687 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1857764697, now seen corresponding path program 1 times [2021-06-05 22:11:49,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026994901] [2021-06-05 22:11:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:49,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026994901] [2021-06-05 22:11:49,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026994901] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:49,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:49,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:11:49,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609095829] [2021-06-05 22:11:49,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:11:49,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:11:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,701 INFO L87 Difference]: Start difference. First operand 233 states and 989 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,706 INFO L93 Difference]: Finished difference Result 268 states and 1130 transitions. [2021-06-05 22:11:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:11:49,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:11:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,708 INFO L225 Difference]: With dead ends: 268 [2021-06-05 22:11:49,708 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 22:11:49,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 22:11:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 262. [2021-06-05 22:11:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 4.2796934865900385) internal successors, (1117), 261 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 1117 transitions. [2021-06-05 22:11:49,714 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 1117 transitions. Word has length 15 [2021-06-05 22:11:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,715 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 1117 transitions. [2021-06-05 22:11:49,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 1117 transitions. [2021-06-05 22:11:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:11:49,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,715 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:11:49,716 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1693444409, now seen corresponding path program 1 times [2021-06-05 22:11:49,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753230587] [2021-06-05 22:11:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:49,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753230587] [2021-06-05 22:11:49,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753230587] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:49,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:49,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:11:49,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119959828] [2021-06-05 22:11:49,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:11:49,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:11:49,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,727 INFO L87 Difference]: Start difference. First operand 262 states and 1117 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,733 INFO L93 Difference]: Finished difference Result 297 states and 1258 transitions. [2021-06-05 22:11:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:11:49,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:11:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,735 INFO L225 Difference]: With dead ends: 297 [2021-06-05 22:11:49,735 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 22:11:49,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 22:11:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-06-05 22:11:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 4.25) internal successors, (1258), 296 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 1258 transitions. [2021-06-05 22:11:49,742 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 1258 transitions. Word has length 15 [2021-06-05 22:11:49,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,742 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 1258 transitions. [2021-06-05 22:11:49,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,742 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 1258 transitions. [2021-06-05 22:11:49,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:11:49,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,743 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 22:11:49,743 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2109293491, now seen corresponding path program 1 times [2021-06-05 22:11:49,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437517218] [2021-06-05 22:11:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:49,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437517218] [2021-06-05 22:11:49,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437517218] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:49,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:49,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:11:49,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326768669] [2021-06-05 22:11:49,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:11:49,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:11:49,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,760 INFO L87 Difference]: Start difference. First operand 297 states and 1258 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,765 INFO L93 Difference]: Finished difference Result 340 states and 1425 transitions. [2021-06-05 22:11:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:11:49,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:11:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,767 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:11:49,767 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 22:11:49,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 22:11:49,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-06-05 22:11:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 4.2298507462686565) internal successors, (1417), 335 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1417 transitions. [2021-06-05 22:11:49,775 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1417 transitions. Word has length 15 [2021-06-05 22:11:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,775 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1417 transitions. [2021-06-05 22:11:49,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1417 transitions. [2021-06-05 22:11:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:11:49,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,776 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 22:11:49,776 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1748926659, now seen corresponding path program 1 times [2021-06-05 22:11:49,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337298690] [2021-06-05 22:11:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:49,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337298690] [2021-06-05 22:11:49,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337298690] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:49,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:49,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:11:49,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226968084] [2021-06-05 22:11:49,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:11:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:11:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,787 INFO L87 Difference]: Start difference. First operand 336 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,792 INFO L93 Difference]: Finished difference Result 386 states and 1608 transitions. [2021-06-05 22:11:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:11:49,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:11:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,795 INFO L225 Difference]: With dead ends: 386 [2021-06-05 22:11:49,795 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 22:11:49,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 22:11:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-06-05 22:11:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 4.176623376623376) internal successors, (1608), 385 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1608 transitions. [2021-06-05 22:11:49,803 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1608 transitions. Word has length 15 [2021-06-05 22:11:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,803 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1608 transitions. [2021-06-05 22:11:49,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1608 transitions. [2021-06-05 22:11:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:11:49,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,804 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 22:11:49,805 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash 181705837, now seen corresponding path program 1 times [2021-06-05 22:11:49,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272467433] [2021-06-05 22:11:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:49,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272467433] [2021-06-05 22:11:49,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272467433] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:49,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:49,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:11:49,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607957330] [2021-06-05 22:11:49,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:11:49,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:11:49,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,817 INFO L87 Difference]: Start difference. First operand 386 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,823 INFO L93 Difference]: Finished difference Result 436 states and 1799 transitions. [2021-06-05 22:11:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:11:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:11:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,825 INFO L225 Difference]: With dead ends: 436 [2021-06-05 22:11:49,825 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 22:11:49,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 22:11:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2021-06-05 22:11:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 4.135632183908046) internal successors, (1799), 435 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1799 transitions. [2021-06-05 22:11:49,835 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1799 transitions. Word has length 15 [2021-06-05 22:11:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,835 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1799 transitions. [2021-06-05 22:11:49,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1799 transitions. [2021-06-05 22:11:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:11:49,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,836 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 22:11:49,836 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,836 INFO L82 PathProgramCache]: Analyzing trace with hash 542072669, now seen corresponding path program 1 times [2021-06-05 22:11:49,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86953835] [2021-06-05 22:11:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:49,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86953835] [2021-06-05 22:11:49,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86953835] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:49,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:49,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:11:49,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456738133] [2021-06-05 22:11:49,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:11:49,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:11:49,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,847 INFO L87 Difference]: Start difference. First operand 436 states and 1799 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,853 INFO L93 Difference]: Finished difference Result 493 states and 2014 transitions. [2021-06-05 22:11:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:11:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:11:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,855 INFO L225 Difference]: With dead ends: 493 [2021-06-05 22:11:49,855 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 22:11:49,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:11:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 22:11:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2021-06-05 22:11:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 4.09349593495935) internal successors, (2014), 492 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 2014 transitions. [2021-06-05 22:11:49,866 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 2014 transitions. Word has length 15 [2021-06-05 22:11:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,866 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 2014 transitions. [2021-06-05 22:11:49,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 2014 transitions. [2021-06-05 22:11:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:49,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,867 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 22:11:49,867 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,868 INFO L82 PathProgramCache]: Analyzing trace with hash 705140398, now seen corresponding path program 1 times [2021-06-05 22:11:49,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695063872] [2021-06-05 22:11:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695063872] [2021-06-05 22:11:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695063872] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:49,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:49,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:49,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158277443] [2021-06-05 22:11:49,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:49,902 INFO L87 Difference]: Start difference. First operand 493 states and 2014 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,992 INFO L93 Difference]: Finished difference Result 771 states and 2757 transitions. [2021-06-05 22:11:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:49,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,995 INFO L225 Difference]: With dead ends: 771 [2021-06-05 22:11:49,995 INFO L226 Difference]: Without dead ends: 744 [2021-06-05 22:11:49,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-05 22:11:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 557. [2021-06-05 22:11:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.9244604316546763) internal successors, (2182), 556 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 2182 transitions. [2021-06-05 22:11:50,010 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 2182 transitions. Word has length 16 [2021-06-05 22:11:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:50,011 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 2182 transitions. [2021-06-05 22:11:50,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 2182 transitions. [2021-06-05 22:11:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:50,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:50,012 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:50,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 22:11:50,012 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash -85243986, now seen corresponding path program 2 times [2021-06-05 22:11:50,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:50,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151736209] [2021-06-05 22:11:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:50,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:50,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151736209] [2021-06-05 22:11:50,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151736209] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:50,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:50,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:50,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309750912] [2021-06-05 22:11:50,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:50,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:50,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:50,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:50,052 INFO L87 Difference]: Start difference. First operand 557 states and 2182 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:50,133 INFO L93 Difference]: Finished difference Result 746 states and 2672 transitions. [2021-06-05 22:11:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:50,137 INFO L225 Difference]: With dead ends: 746 [2021-06-05 22:11:50,137 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 22:11:50,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 22:11:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 565. [2021-06-05 22:11:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.904255319148936) internal successors, (2202), 564 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2202 transitions. [2021-06-05 22:11:50,152 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2202 transitions. Word has length 16 [2021-06-05 22:11:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:50,153 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2202 transitions. [2021-06-05 22:11:50,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2202 transitions. [2021-06-05 22:11:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:50,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:50,155 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:50,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 22:11:50,156 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:50,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1842088947, now seen corresponding path program 1 times [2021-06-05 22:11:50,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:50,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144310594] [2021-06-05 22:11:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:50,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:50,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144310594] [2021-06-05 22:11:50,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144310594] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:50,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:50,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:50,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089003246] [2021-06-05 22:11:50,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:50,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:50,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:50,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:50,260 INFO L87 Difference]: Start difference. First operand 565 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:50,511 INFO L93 Difference]: Finished difference Result 839 states and 2923 transitions. [2021-06-05 22:11:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:50,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:50,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:50,515 INFO L225 Difference]: With dead ends: 839 [2021-06-05 22:11:50,515 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 22:11:50,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 22:11:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 625. [2021-06-05 22:11:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.7628205128205128) internal successors, (2348), 624 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2348 transitions. [2021-06-05 22:11:50,529 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2348 transitions. Word has length 16 [2021-06-05 22:11:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:50,530 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 2348 transitions. [2021-06-05 22:11:50,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2348 transitions. [2021-06-05 22:11:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:50,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:50,531 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:50,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 22:11:50,531 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1662493965, now seen corresponding path program 2 times [2021-06-05 22:11:50,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:50,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602588815] [2021-06-05 22:11:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:50,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602588815] [2021-06-05 22:11:50,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602588815] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:50,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:50,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:50,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322360700] [2021-06-05 22:11:50,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:50,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:50,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:50,612 INFO L87 Difference]: Start difference. First operand 625 states and 2348 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:50,831 INFO L93 Difference]: Finished difference Result 814 states and 2838 transitions. [2021-06-05 22:11:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:50,835 INFO L225 Difference]: With dead ends: 814 [2021-06-05 22:11:50,835 INFO L226 Difference]: Without dead ends: 787 [2021-06-05 22:11:50,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-06-05 22:11:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 633. [2021-06-05 22:11:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.7468354430379747) internal successors, (2368), 632 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2368 transitions. [2021-06-05 22:11:50,848 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2368 transitions. Word has length 16 [2021-06-05 22:11:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:50,848 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 2368 transitions. [2021-06-05 22:11:50,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2368 transitions. [2021-06-05 22:11:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:50,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:50,850 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:50,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 22:11:50,850 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash -881757258, now seen corresponding path program 1 times [2021-06-05 22:11:50,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:50,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269023624] [2021-06-05 22:11:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:50,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:50,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269023624] [2021-06-05 22:11:50,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269023624] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:50,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:50,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864041475] [2021-06-05 22:11:50,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:50,890 INFO L87 Difference]: Start difference. First operand 633 states and 2368 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:51,019 INFO L93 Difference]: Finished difference Result 974 states and 3400 transitions. [2021-06-05 22:11:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:51,024 INFO L225 Difference]: With dead ends: 974 [2021-06-05 22:11:51,024 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 22:11:51,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:11:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 22:11:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 641. [2021-06-05 22:11:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 3.7375) internal successors, (2392), 640 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 2392 transitions. [2021-06-05 22:11:51,039 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 2392 transitions. Word has length 16 [2021-06-05 22:11:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:51,039 INFO L482 AbstractCegarLoop]: Abstraction has 641 states and 2392 transitions. [2021-06-05 22:11:51,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 2392 transitions. [2021-06-05 22:11:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:51,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:51,042 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:51,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 22:11:51,042 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:51,042 INFO L82 PathProgramCache]: Analyzing trace with hash 768619160, now seen corresponding path program 1 times [2021-06-05 22:11:51,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:51,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825080241] [2021-06-05 22:11:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:51,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:51,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825080241] [2021-06-05 22:11:51,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825080241] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:51,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:51,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269799680] [2021-06-05 22:11:51,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:51,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:51,119 INFO L87 Difference]: Start difference. First operand 641 states and 2392 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:51,256 INFO L93 Difference]: Finished difference Result 965 states and 3345 transitions. [2021-06-05 22:11:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:51,261 INFO L225 Difference]: With dead ends: 965 [2021-06-05 22:11:51,261 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 22:11:51,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:11:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 22:11:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 645. [2021-06-05 22:11:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.732919254658385) internal successors, (2404), 644 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2404 transitions. [2021-06-05 22:11:51,276 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2404 transitions. Word has length 16 [2021-06-05 22:11:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:51,276 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2404 transitions. [2021-06-05 22:11:51,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2404 transitions. [2021-06-05 22:11:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:51,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:51,277 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:51,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 22:11:51,278 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:51,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1488759573, now seen corresponding path program 1 times [2021-06-05 22:11:51,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:51,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415998378] [2021-06-05 22:11:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:51,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:51,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415998378] [2021-06-05 22:11:51,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415998378] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:51,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:51,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:51,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847563423] [2021-06-05 22:11:51,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:51,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:51,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:51,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:51,415 INFO L87 Difference]: Start difference. First operand 645 states and 2404 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:51,608 INFO L93 Difference]: Finished difference Result 1001 states and 3467 transitions. [2021-06-05 22:11:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:51,612 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:11:51,612 INFO L226 Difference]: Without dead ends: 978 [2021-06-05 22:11:51,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:11:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-06-05 22:11:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 653. [2021-06-05 22:11:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.723926380368098) internal successors, (2428), 652 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2428 transitions. [2021-06-05 22:11:51,629 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2428 transitions. Word has length 16 [2021-06-05 22:11:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:51,629 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 2428 transitions. [2021-06-05 22:11:51,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2428 transitions. [2021-06-05 22:11:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:51,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:51,630 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:51,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 22:11:51,631 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:51,631 INFO L82 PathProgramCache]: Analyzing trace with hash 185156587, now seen corresponding path program 1 times [2021-06-05 22:11:51,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:51,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270772438] [2021-06-05 22:11:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:51,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:51,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270772438] [2021-06-05 22:11:51,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270772438] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:51,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:51,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:51,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112570827] [2021-06-05 22:11:51,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:51,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:51,743 INFO L87 Difference]: Start difference. First operand 653 states and 2428 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:51,916 INFO L93 Difference]: Finished difference Result 972 states and 3352 transitions. [2021-06-05 22:11:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:51,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:51,920 INFO L225 Difference]: With dead ends: 972 [2021-06-05 22:11:51,920 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 22:11:51,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:11:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 22:11:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 657. [2021-06-05 22:11:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.7195121951219514) internal successors, (2440), 656 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2440 transitions. [2021-06-05 22:11:51,934 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2440 transitions. Word has length 16 [2021-06-05 22:11:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:51,934 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2440 transitions. [2021-06-05 22:11:51,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2440 transitions. [2021-06-05 22:11:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:51,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:51,936 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:51,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 22:11:51,936 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:51,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1866944204, now seen corresponding path program 2 times [2021-06-05 22:11:51,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:51,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561713983] [2021-06-05 22:11:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:52,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:52,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561713983] [2021-06-05 22:11:52,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561713983] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:52,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:52,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:52,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269705663] [2021-06-05 22:11:52,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:52,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:52,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:52,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:52,013 INFO L87 Difference]: Start difference. First operand 657 states and 2440 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:52,128 INFO L93 Difference]: Finished difference Result 1084 states and 3758 transitions. [2021-06-05 22:11:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:52,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:52,132 INFO L225 Difference]: With dead ends: 1084 [2021-06-05 22:11:52,132 INFO L226 Difference]: Without dead ends: 1055 [2021-06-05 22:11:52,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-06-05 22:11:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 657. [2021-06-05 22:11:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.7195121951219514) internal successors, (2440), 656 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2440 transitions. [2021-06-05 22:11:52,144 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2440 transitions. Word has length 16 [2021-06-05 22:11:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:52,145 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2440 transitions. [2021-06-05 22:11:52,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2440 transitions. [2021-06-05 22:11:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:52,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:52,146 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:52,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 22:11:52,146 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1453708437, now seen corresponding path program 2 times [2021-06-05 22:11:52,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:52,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348908151] [2021-06-05 22:11:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:52,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:52,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348908151] [2021-06-05 22:11:52,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348908151] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:52,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:52,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:52,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914333154] [2021-06-05 22:11:52,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:52,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:52,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:52,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:52,220 INFO L87 Difference]: Start difference. First operand 657 states and 2440 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:52,408 INFO L93 Difference]: Finished difference Result 1088 states and 3767 transitions. [2021-06-05 22:11:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:52,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:52,412 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 22:11:52,412 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 22:11:52,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 22:11:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 657. [2021-06-05 22:11:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.7134146341463414) internal successors, (2436), 656 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2436 transitions. [2021-06-05 22:11:52,424 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2436 transitions. Word has length 16 [2021-06-05 22:11:52,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:52,424 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2436 transitions. [2021-06-05 22:11:52,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,424 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2436 transitions. [2021-06-05 22:11:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:52,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:52,425 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:52,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 22:11:52,425 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1227931188, now seen corresponding path program 2 times [2021-06-05 22:11:52,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:52,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600459637] [2021-06-05 22:11:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:52,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:52,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600459637] [2021-06-05 22:11:52,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600459637] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:52,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:52,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:52,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966657044] [2021-06-05 22:11:52,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:52,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:52,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:52,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:52,503 INFO L87 Difference]: Start difference. First operand 657 states and 2436 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:52,656 INFO L93 Difference]: Finished difference Result 1111 states and 3788 transitions. [2021-06-05 22:11:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:52,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:52,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:52,660 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 22:11:52,660 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 22:11:52,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:52,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 22:11:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 657. [2021-06-05 22:11:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.7134146341463414) internal successors, (2436), 656 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2436 transitions. [2021-06-05 22:11:52,672 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2436 transitions. Word has length 16 [2021-06-05 22:11:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:52,672 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2436 transitions. [2021-06-05 22:11:52,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2436 transitions. [2021-06-05 22:11:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:52,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:52,674 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:52,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 22:11:52,674 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1214418261, now seen corresponding path program 2 times [2021-06-05 22:11:52,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:52,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092169734] [2021-06-05 22:11:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:52,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:52,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092169734] [2021-06-05 22:11:52,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092169734] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:52,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:52,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:52,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55857583] [2021-06-05 22:11:52,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:52,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:52,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:52,742 INFO L87 Difference]: Start difference. First operand 657 states and 2436 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:52,932 INFO L93 Difference]: Finished difference Result 1170 states and 4044 transitions. [2021-06-05 22:11:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:11:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:52,934 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 22:11:52,935 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 22:11:52,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 22:11:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 657. [2021-06-05 22:11:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.7103658536585367) internal successors, (2434), 656 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2434 transitions. [2021-06-05 22:11:52,946 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2434 transitions. Word has length 16 [2021-06-05 22:11:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:52,946 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2434 transitions. [2021-06-05 22:11:52,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2434 transitions. [2021-06-05 22:11:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:52,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:52,948 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:52,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 22:11:52,948 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash 423749436, now seen corresponding path program 3 times [2021-06-05 22:11:52,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:52,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437442818] [2021-06-05 22:11:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:52,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437442818] [2021-06-05 22:11:52,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437442818] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:52,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:52,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:52,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059921942] [2021-06-05 22:11:52,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:52,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:52,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:52,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:52,990 INFO L87 Difference]: Start difference. First operand 657 states and 2434 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,057 INFO L93 Difference]: Finished difference Result 814 states and 2762 transitions. [2021-06-05 22:11:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,059 INFO L225 Difference]: With dead ends: 814 [2021-06-05 22:11:53,059 INFO L226 Difference]: Without dead ends: 785 [2021-06-05 22:11:53,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-06-05 22:11:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 633. [2021-06-05 22:11:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.6455696202531644) internal successors, (2304), 632 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2304 transitions. [2021-06-05 22:11:53,070 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2304 transitions. Word has length 16 [2021-06-05 22:11:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,070 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 2304 transitions. [2021-06-05 22:11:53,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2304 transitions. [2021-06-05 22:11:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:53,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,071 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 22:11:53,071 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash 315557690, now seen corresponding path program 4 times [2021-06-05 22:11:53,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763944854] [2021-06-05 22:11:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:53,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:53,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763944854] [2021-06-05 22:11:53,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763944854] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:53,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:53,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:53,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904718971] [2021-06-05 22:11:53,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:53,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:53,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:53,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:53,113 INFO L87 Difference]: Start difference. First operand 633 states and 2304 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,179 INFO L93 Difference]: Finished difference Result 814 states and 2770 transitions. [2021-06-05 22:11:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:53,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,181 INFO L225 Difference]: With dead ends: 814 [2021-06-05 22:11:53,181 INFO L226 Difference]: Without dead ends: 785 [2021-06-05 22:11:53,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-06-05 22:11:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 645. [2021-06-05 22:11:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.627329192546584) internal successors, (2336), 644 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2336 transitions. [2021-06-05 22:11:53,191 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2336 transitions. Word has length 16 [2021-06-05 22:11:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,191 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2336 transitions. [2021-06-05 22:11:53,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2336 transitions. [2021-06-05 22:11:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:53,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,192 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 22:11:53,192 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 486403162, now seen corresponding path program 3 times [2021-06-05 22:11:53,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153280790] [2021-06-05 22:11:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:53,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:53,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153280790] [2021-06-05 22:11:53,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153280790] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:53,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:53,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:53,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830847455] [2021-06-05 22:11:53,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:53,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:53,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:53,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:53,235 INFO L87 Difference]: Start difference. First operand 645 states and 2336 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,306 INFO L93 Difference]: Finished difference Result 871 states and 2889 transitions. [2021-06-05 22:11:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,308 INFO L225 Difference]: With dead ends: 871 [2021-06-05 22:11:53,308 INFO L226 Difference]: Without dead ends: 848 [2021-06-05 22:11:53,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-06-05 22:11:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 614. [2021-06-05 22:11:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.5807504078303425) internal successors, (2195), 613 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2195 transitions. [2021-06-05 22:11:53,318 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2195 transitions. Word has length 16 [2021-06-05 22:11:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,318 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 2195 transitions. [2021-06-05 22:11:53,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2195 transitions. [2021-06-05 22:11:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:53,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,319 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 22:11:53,319 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1119769510, now seen corresponding path program 4 times [2021-06-05 22:11:53,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109276828] [2021-06-05 22:11:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:53,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109276828] [2021-06-05 22:11:53,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109276828] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:53,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:53,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:53,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395051319] [2021-06-05 22:11:53,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:53,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:53,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:53,367 INFO L87 Difference]: Start difference. First operand 614 states and 2195 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,441 INFO L93 Difference]: Finished difference Result 817 states and 2734 transitions. [2021-06-05 22:11:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,442 INFO L225 Difference]: With dead ends: 817 [2021-06-05 22:11:53,443 INFO L226 Difference]: Without dead ends: 794 [2021-06-05 22:11:53,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-06-05 22:11:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 618. [2021-06-05 22:11:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.5769854132901133) internal successors, (2207), 617 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 2207 transitions. [2021-06-05 22:11:53,452 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 2207 transitions. Word has length 16 [2021-06-05 22:11:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,452 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 2207 transitions. [2021-06-05 22:11:53,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 2207 transitions. [2021-06-05 22:11:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:53,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,453 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 22:11:53,453 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2014690215, now seen corresponding path program 3 times [2021-06-05 22:11:53,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231968098] [2021-06-05 22:11:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:53,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:53,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231968098] [2021-06-05 22:11:53,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231968098] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:53,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:53,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:53,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528866046] [2021-06-05 22:11:53,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:53,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:53,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:53,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:53,532 INFO L87 Difference]: Start difference. First operand 618 states and 2207 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,721 INFO L93 Difference]: Finished difference Result 742 states and 2401 transitions. [2021-06-05 22:11:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,723 INFO L225 Difference]: With dead ends: 742 [2021-06-05 22:11:53,723 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 22:11:53,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 22:11:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 555. [2021-06-05 22:11:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 3.487364620938628) internal successors, (1932), 554 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1932 transitions. [2021-06-05 22:11:53,732 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1932 transitions. Word has length 16 [2021-06-05 22:11:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,732 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1932 transitions. [2021-06-05 22:11:53,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1932 transitions. [2021-06-05 22:11:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:53,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,733 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 22:11:53,733 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1307197767, now seen corresponding path program 4 times [2021-06-05 22:11:53,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947366288] [2021-06-05 22:11:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:53,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:53,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947366288] [2021-06-05 22:11:53,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947366288] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:53,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:53,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:53,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408699430] [2021-06-05 22:11:53,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:53,788 INFO L87 Difference]: Start difference. First operand 555 states and 1932 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,948 INFO L93 Difference]: Finished difference Result 829 states and 2671 transitions. [2021-06-05 22:11:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,950 INFO L225 Difference]: With dead ends: 829 [2021-06-05 22:11:53,950 INFO L226 Difference]: Without dead ends: 806 [2021-06-05 22:11:53,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-06-05 22:11:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 565. [2021-06-05 22:11:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.469858156028369) internal successors, (1957), 564 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1957 transitions. [2021-06-05 22:11:53,959 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1957 transitions. Word has length 16 [2021-06-05 22:11:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,959 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 1957 transitions. [2021-06-05 22:11:53,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1957 transitions. [2021-06-05 22:11:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:53,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,960 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 22:11:53,960 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2145877403, now seen corresponding path program 3 times [2021-06-05 22:11:53,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639619080] [2021-06-05 22:11:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:54,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:54,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639619080] [2021-06-05 22:11:54,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639619080] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:54,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:54,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:54,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677993659] [2021-06-05 22:11:54,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:54,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:54,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:54,036 INFO L87 Difference]: Start difference. First operand 565 states and 1957 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:54,156 INFO L93 Difference]: Finished difference Result 670 states and 2109 transitions. [2021-06-05 22:11:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:54,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:54,158 INFO L225 Difference]: With dead ends: 670 [2021-06-05 22:11:54,158 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 22:11:54,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 22:11:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 499. [2021-06-05 22:11:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.3493975903614457) internal successors, (1668), 498 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1668 transitions. [2021-06-05 22:11:54,167 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1668 transitions. Word has length 16 [2021-06-05 22:11:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:54,167 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1668 transitions. [2021-06-05 22:11:54,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1668 transitions. [2021-06-05 22:11:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:54,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:54,168 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:54,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-05 22:11:54,168 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:54,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1820955431, now seen corresponding path program 4 times [2021-06-05 22:11:54,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:54,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467662691] [2021-06-05 22:11:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:54,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:54,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467662691] [2021-06-05 22:11:54,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467662691] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:54,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:54,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299816956] [2021-06-05 22:11:54,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:54,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:54,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:54,220 INFO L87 Difference]: Start difference. First operand 499 states and 1668 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:54,418 INFO L93 Difference]: Finished difference Result 674 states and 2121 transitions. [2021-06-05 22:11:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:54,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:54,419 INFO L225 Difference]: With dead ends: 674 [2021-06-05 22:11:54,419 INFO L226 Difference]: Without dead ends: 645 [2021-06-05 22:11:54,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-06-05 22:11:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 505. [2021-06-05 22:11:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.3472222222222223) internal successors, (1687), 504 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1687 transitions. [2021-06-05 22:11:54,427 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1687 transitions. Word has length 16 [2021-06-05 22:11:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:54,427 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1687 transitions. [2021-06-05 22:11:54,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1687 transitions. [2021-06-05 22:11:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:54,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:54,428 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:54,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-05 22:11:54,428 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash 648487496, now seen corresponding path program 3 times [2021-06-05 22:11:54,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:54,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447641310] [2021-06-05 22:11:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:54,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:54,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447641310] [2021-06-05 22:11:54,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447641310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:54,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:54,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:54,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743920722] [2021-06-05 22:11:54,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:54,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:54,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:54,491 INFO L87 Difference]: Start difference. First operand 505 states and 1687 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:54,685 INFO L93 Difference]: Finished difference Result 1060 states and 3246 transitions. [2021-06-05 22:11:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:11:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:54,687 INFO L225 Difference]: With dead ends: 1060 [2021-06-05 22:11:54,687 INFO L226 Difference]: Without dead ends: 1033 [2021-06-05 22:11:54,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:11:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-06-05 22:11:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 505. [2021-06-05 22:11:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.3472222222222223) internal successors, (1687), 504 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1687 transitions. [2021-06-05 22:11:54,699 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1687 transitions. Word has length 16 [2021-06-05 22:11:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:54,699 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1687 transitions. [2021-06-05 22:11:54,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1687 transitions. [2021-06-05 22:11:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:54,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:54,700 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:54,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-05 22:11:54,701 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash 529800585, now seen corresponding path program 3 times [2021-06-05 22:11:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440674345] [2021-06-05 22:11:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:54,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:54,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440674345] [2021-06-05 22:11:54,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440674345] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:54,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:54,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260177950] [2021-06-05 22:11:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:54,886 INFO L87 Difference]: Start difference. First operand 505 states and 1687 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:55,028 INFO L93 Difference]: Finished difference Result 821 states and 2570 transitions. [2021-06-05 22:11:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:55,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:55,030 INFO L225 Difference]: With dead ends: 821 [2021-06-05 22:11:55,030 INFO L226 Difference]: Without dead ends: 794 [2021-06-05 22:11:55,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:55,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-06-05 22:11:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 505. [2021-06-05 22:11:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.3472222222222223) internal successors, (1687), 504 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1687 transitions. [2021-06-05 22:11:55,038 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1687 transitions. Word has length 16 [2021-06-05 22:11:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:55,038 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1687 transitions. [2021-06-05 22:11:55,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1687 transitions. [2021-06-05 22:11:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:55,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:55,039 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:55,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-05 22:11:55,040 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:55,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1222989368, now seen corresponding path program 5 times [2021-06-05 22:11:55,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:55,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776807756] [2021-06-05 22:11:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:55,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776807756] [2021-06-05 22:11:55,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776807756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:55,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:55,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:55,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568865197] [2021-06-05 22:11:55,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:55,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:55,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:55,084 INFO L87 Difference]: Start difference. First operand 505 states and 1687 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:55,202 INFO L93 Difference]: Finished difference Result 891 states and 2762 transitions. [2021-06-05 22:11:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:55,209 INFO L225 Difference]: With dead ends: 891 [2021-06-05 22:11:55,209 INFO L226 Difference]: Without dead ends: 862 [2021-06-05 22:11:55,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-06-05 22:11:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 494. [2021-06-05 22:11:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.36105476673428) internal successors, (1657), 493 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1657 transitions. [2021-06-05 22:11:55,217 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1657 transitions. Word has length 16 [2021-06-05 22:11:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:55,217 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1657 transitions. [2021-06-05 22:11:55,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1657 transitions. [2021-06-05 22:11:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:55,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:55,218 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:55,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-05 22:11:55,218 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:55,219 INFO L82 PathProgramCache]: Analyzing trace with hash -248674713, now seen corresponding path program 5 times [2021-06-05 22:11:55,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:55,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042736221] [2021-06-05 22:11:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:55,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:55,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042736221] [2021-06-05 22:11:55,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042736221] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:55,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:55,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:55,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116013385] [2021-06-05 22:11:55,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:55,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:55,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:55,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:55,293 INFO L87 Difference]: Start difference. First operand 494 states and 1657 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:55,447 INFO L93 Difference]: Finished difference Result 868 states and 2732 transitions. [2021-06-05 22:11:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:55,449 INFO L225 Difference]: With dead ends: 868 [2021-06-05 22:11:55,449 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 22:11:55,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 22:11:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 494. [2021-06-05 22:11:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3509127789046653) internal successors, (1652), 493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1652 transitions. [2021-06-05 22:11:55,457 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1652 transitions. Word has length 16 [2021-06-05 22:11:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:55,457 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1652 transitions. [2021-06-05 22:11:55,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1652 transitions. [2021-06-05 22:11:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:55,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:55,458 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:55,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-05 22:11:55,458 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1291259644, now seen corresponding path program 6 times [2021-06-05 22:11:55,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:55,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516509521] [2021-06-05 22:11:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:55,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:55,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516509521] [2021-06-05 22:11:55,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516509521] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:55,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:55,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:55,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744140557] [2021-06-05 22:11:55,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:55,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:55,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:55,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:55,527 INFO L87 Difference]: Start difference. First operand 494 states and 1652 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:55,633 INFO L93 Difference]: Finished difference Result 741 states and 2296 transitions. [2021-06-05 22:11:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:55,649 INFO L225 Difference]: With dead ends: 741 [2021-06-05 22:11:55,649 INFO L226 Difference]: Without dead ends: 712 [2021-06-05 22:11:55,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-06-05 22:11:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 494. [2021-06-05 22:11:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3509127789046653) internal successors, (1652), 493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1652 transitions. [2021-06-05 22:11:55,658 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1652 transitions. Word has length 16 [2021-06-05 22:11:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:55,658 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1652 transitions. [2021-06-05 22:11:55,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1652 transitions. [2021-06-05 22:11:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:55,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:55,659 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:55,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-05 22:11:55,660 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:55,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1392400701, now seen corresponding path program 6 times [2021-06-05 22:11:55,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:55,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066820986] [2021-06-05 22:11:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:55,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:55,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066820986] [2021-06-05 22:11:55,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066820986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:55,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:55,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:55,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272313571] [2021-06-05 22:11:55,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:55,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:55,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:55,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:55,761 INFO L87 Difference]: Start difference. First operand 494 states and 1652 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:55,895 INFO L93 Difference]: Finished difference Result 773 states and 2416 transitions. [2021-06-05 22:11:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:55,896 INFO L225 Difference]: With dead ends: 773 [2021-06-05 22:11:55,896 INFO L226 Difference]: Without dead ends: 744 [2021-06-05 22:11:55,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-05 22:11:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 494. [2021-06-05 22:11:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3509127789046653) internal successors, (1652), 493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1652 transitions. [2021-06-05 22:11:55,904 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1652 transitions. Word has length 16 [2021-06-05 22:11:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:55,904 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1652 transitions. [2021-06-05 22:11:55,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,904 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1652 transitions. [2021-06-05 22:11:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:55,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:55,905 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:55,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-05 22:11:55,905 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:55,905 INFO L82 PathProgramCache]: Analyzing trace with hash 498850876, now seen corresponding path program 4 times [2021-06-05 22:11:55,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:55,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129483599] [2021-06-05 22:11:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:55,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:55,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129483599] [2021-06-05 22:11:55,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129483599] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:55,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:55,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:55,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059613782] [2021-06-05 22:11:55,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:55,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:55,958 INFO L87 Difference]: Start difference. First operand 494 states and 1652 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:56,068 INFO L93 Difference]: Finished difference Result 889 states and 2730 transitions. [2021-06-05 22:11:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:56,069 INFO L225 Difference]: With dead ends: 889 [2021-06-05 22:11:56,069 INFO L226 Difference]: Without dead ends: 862 [2021-06-05 22:11:56,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-06-05 22:11:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 494. [2021-06-05 22:11:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3509127789046653) internal successors, (1652), 493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1652 transitions. [2021-06-05 22:11:56,078 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1652 transitions. Word has length 16 [2021-06-05 22:11:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:56,078 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1652 transitions. [2021-06-05 22:11:56,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1652 transitions. [2021-06-05 22:11:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:56,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:56,079 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:56,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-05 22:11:56,079 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:56,080 INFO L82 PathProgramCache]: Analyzing trace with hash 637834109, now seen corresponding path program 4 times [2021-06-05 22:11:56,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:56,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224549523] [2021-06-05 22:11:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:56,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:56,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224549523] [2021-06-05 22:11:56,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224549523] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:56,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:56,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:56,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558185436] [2021-06-05 22:11:56,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:56,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:56,177 INFO L87 Difference]: Start difference. First operand 494 states and 1652 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:56,332 INFO L93 Difference]: Finished difference Result 863 states and 2698 transitions. [2021-06-05 22:11:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:56,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:56,333 INFO L225 Difference]: With dead ends: 863 [2021-06-05 22:11:56,333 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 22:11:56,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 22:11:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 494. [2021-06-05 22:11:56,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3448275862068964) internal successors, (1649), 493 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1649 transitions. [2021-06-05 22:11:56,341 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1649 transitions. Word has length 16 [2021-06-05 22:11:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:56,341 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1649 transitions. [2021-06-05 22:11:56,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1649 transitions. [2021-06-05 22:11:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:56,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:56,342 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:56,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-05 22:11:56,342 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:56,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1681413370, now seen corresponding path program 5 times [2021-06-05 22:11:56,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:56,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429676523] [2021-06-05 22:11:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:56,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:56,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429676523] [2021-06-05 22:11:56,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429676523] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:56,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:56,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:56,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551082501] [2021-06-05 22:11:56,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:56,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:56,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:56,373 INFO L87 Difference]: Start difference. First operand 494 states and 1649 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:56,436 INFO L93 Difference]: Finished difference Result 731 states and 2291 transitions. [2021-06-05 22:11:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:56,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:56,438 INFO L225 Difference]: With dead ends: 731 [2021-06-05 22:11:56,438 INFO L226 Difference]: Without dead ends: 704 [2021-06-05 22:11:56,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-05 22:11:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 494. [2021-06-05 22:11:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3448275862068964) internal successors, (1649), 493 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1649 transitions. [2021-06-05 22:11:56,445 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1649 transitions. Word has length 16 [2021-06-05 22:11:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:56,445 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1649 transitions. [2021-06-05 22:11:56,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1649 transitions. [2021-06-05 22:11:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:56,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:56,446 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:56,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 22:11:56,446 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:56,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1580392411, now seen corresponding path program 5 times [2021-06-05 22:11:56,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:56,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284260834] [2021-06-05 22:11:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:56,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:56,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284260834] [2021-06-05 22:11:56,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284260834] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:56,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:56,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324444745] [2021-06-05 22:11:56,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:56,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:56,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:56,539 INFO L87 Difference]: Start difference. First operand 494 states and 1649 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:56,809 INFO L93 Difference]: Finished difference Result 731 states and 2291 transitions. [2021-06-05 22:11:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:56,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:56,810 INFO L225 Difference]: With dead ends: 731 [2021-06-05 22:11:56,811 INFO L226 Difference]: Without dead ends: 704 [2021-06-05 22:11:56,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:11:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-05 22:11:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 494. [2021-06-05 22:11:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3448275862068964) internal successors, (1649), 493 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1649 transitions. [2021-06-05 22:11:56,818 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1649 transitions. Word has length 16 [2021-06-05 22:11:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:56,818 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1649 transitions. [2021-06-05 22:11:56,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1649 transitions. [2021-06-05 22:11:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:56,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:56,819 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:56,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-05 22:11:56,819 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash 784334086, now seen corresponding path program 5 times [2021-06-05 22:11:56,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:56,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044359544] [2021-06-05 22:11:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:56,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:56,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044359544] [2021-06-05 22:11:56,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044359544] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:56,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:56,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:56,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882465209] [2021-06-05 22:11:56,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:56,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:56,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:56,868 INFO L87 Difference]: Start difference. First operand 494 states and 1649 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:56,982 INFO L93 Difference]: Finished difference Result 793 states and 2506 transitions. [2021-06-05 22:11:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:56,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:56,983 INFO L225 Difference]: With dead ends: 793 [2021-06-05 22:11:56,983 INFO L226 Difference]: Without dead ends: 770 [2021-06-05 22:11:56,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:11:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-06-05 22:11:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 490. [2021-06-05 22:11:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.347648261758691) internal successors, (1637), 489 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1637 transitions. [2021-06-05 22:11:56,991 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1637 transitions. Word has length 16 [2021-06-05 22:11:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:56,991 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1637 transitions. [2021-06-05 22:11:56,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1637 transitions. [2021-06-05 22:11:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:56,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:56,992 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:56,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-05 22:11:56,992 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash 797847013, now seen corresponding path program 5 times [2021-06-05 22:11:56,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:56,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061543057] [2021-06-05 22:11:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:57,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:57,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061543057] [2021-06-05 22:11:57,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061543057] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:57,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:57,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:57,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876449716] [2021-06-05 22:11:57,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:57,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:57,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:57,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:57,109 INFO L87 Difference]: Start difference. First operand 490 states and 1637 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:57,309 INFO L93 Difference]: Finished difference Result 803 states and 2527 transitions. [2021-06-05 22:11:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:57,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:57,311 INFO L225 Difference]: With dead ends: 803 [2021-06-05 22:11:57,311 INFO L226 Difference]: Without dead ends: 776 [2021-06-05 22:11:57,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-06-05 22:11:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 490. [2021-06-05 22:11:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.3435582822085887) internal successors, (1635), 489 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1635 transitions. [2021-06-05 22:11:57,318 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1635 transitions. Word has length 16 [2021-06-05 22:11:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:57,318 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1635 transitions. [2021-06-05 22:11:57,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1635 transitions. [2021-06-05 22:11:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:57,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:57,319 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:57,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-05 22:11:57,319 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1214532848, now seen corresponding path program 6 times [2021-06-05 22:11:57,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:57,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047864738] [2021-06-05 22:11:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:57,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047864738] [2021-06-05 22:11:57,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047864738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146760353] [2021-06-05 22:11:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:57,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-06-05 22:11:57,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:11:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:57,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:11:57,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:11:57,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,685 INFO L628 ElimStorePlain]: treesize reduction 133, result has 55.2 percent of original size [2021-06-05 22:11:57,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:11:57,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:311, output treesize:152 [2021-06-05 22:11:57,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:11:57,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:11:57,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 22:11:57,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:11:57,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:11:57,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:11:57,824 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:11:57,828 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,842 INFO L628 ElimStorePlain]: treesize reduction 100, result has 18.0 percent of original size [2021-06-05 22:11:57,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,843 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:275, output treesize:22 [2021-06-05 22:11:57,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:11:57,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:57,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:11:57,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:57,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:8 [2021-06-05 22:11:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:57,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146760353] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:57,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:11:57,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-05 22:11:57,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312682462] [2021-06-05 22:11:57,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:57,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:11:57,926 INFO L87 Difference]: Start difference. First operand 490 states and 1635 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:58,111 INFO L93 Difference]: Finished difference Result 671 states and 2073 transitions. [2021-06-05 22:11:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:58,116 INFO L225 Difference]: With dead ends: 671 [2021-06-05 22:11:58,117 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 22:11:58,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:11:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 22:11:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 490. [2021-06-05 22:11:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.339468302658487) internal successors, (1633), 489 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1633 transitions. [2021-06-05 22:11:58,128 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1633 transitions. Word has length 16 [2021-06-05 22:11:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:58,128 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1633 transitions. [2021-06-05 22:11:58,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1633 transitions. [2021-06-05 22:11:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:58,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:58,129 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:58,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 22:11:58,345 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1154290151, now seen corresponding path program 6 times [2021-06-05 22:11:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:58,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635278735] [2021-06-05 22:11:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:58,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:58,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635278735] [2021-06-05 22:11:58,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635278735] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:58,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:58,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:11:58,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130513391] [2021-06-05 22:11:58,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:11:58,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:58,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:11:58,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:58,502 INFO L87 Difference]: Start difference. First operand 490 states and 1633 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:58,694 INFO L93 Difference]: Finished difference Result 708 states and 2212 transitions. [2021-06-05 22:11:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:58,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:58,696 INFO L225 Difference]: With dead ends: 708 [2021-06-05 22:11:58,696 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 22:11:58,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:11:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 22:11:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 490. [2021-06-05 22:11:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.339468302658487) internal successors, (1633), 489 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1633 transitions. [2021-06-05 22:11:58,703 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1633 transitions. Word has length 16 [2021-06-05 22:11:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:58,703 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1633 transitions. [2021-06-05 22:11:58,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1633 transitions. [2021-06-05 22:11:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:58,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:58,704 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:58,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-05 22:11:58,704 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:58,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1810256696, now seen corresponding path program 6 times [2021-06-05 22:11:58,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:58,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583796221] [2021-06-05 22:11:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:58,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:58,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583796221] [2021-06-05 22:11:58,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583796221] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:58,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:58,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:58,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219902575] [2021-06-05 22:11:58,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:58,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:58,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:58,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:58,742 INFO L87 Difference]: Start difference. First operand 490 states and 1633 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:58,834 INFO L93 Difference]: Finished difference Result 775 states and 2446 transitions. [2021-06-05 22:11:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:58,836 INFO L225 Difference]: With dead ends: 775 [2021-06-05 22:11:58,836 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 22:11:58,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 22:11:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 484. [2021-06-05 22:11:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.341614906832298) internal successors, (1614), 483 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1614 transitions. [2021-06-05 22:11:58,843 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1614 transitions. Word has length 16 [2021-06-05 22:11:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:58,843 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1614 transitions. [2021-06-05 22:11:58,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1614 transitions. [2021-06-05 22:11:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:11:58,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:58,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:58,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-05 22:11:58,844 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:58,844 INFO L82 PathProgramCache]: Analyzing trace with hash 719225929, now seen corresponding path program 6 times [2021-06-05 22:11:58,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:58,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629984066] [2021-06-05 22:11:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:58,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:58,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629984066] [2021-06-05 22:11:58,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629984066] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:58,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:58,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:58,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422760034] [2021-06-05 22:11:58,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:58,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:58,931 INFO L87 Difference]: Start difference. First operand 484 states and 1614 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:59,130 INFO L93 Difference]: Finished difference Result 789 states and 2475 transitions. [2021-06-05 22:11:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:59,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:11:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:59,132 INFO L225 Difference]: With dead ends: 789 [2021-06-05 22:11:59,132 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 22:11:59,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 22:11:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 484. [2021-06-05 22:11:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.3374741200828155) internal successors, (1612), 483 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1612 transitions. [2021-06-05 22:11:59,140 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1612 transitions. Word has length 16 [2021-06-05 22:11:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:59,141 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1612 transitions. [2021-06-05 22:11:59,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1612 transitions. [2021-06-05 22:11:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:11:59,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:59,142 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:59,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-05 22:11:59,142 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1318202505, now seen corresponding path program 1 times [2021-06-05 22:11:59,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:59,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609898576] [2021-06-05 22:11:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:11:59,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:59,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609898576] [2021-06-05 22:11:59,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609898576] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:59,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:59,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:11:59,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890027094] [2021-06-05 22:11:59,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:11:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:11:59,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:11:59,159 INFO L87 Difference]: Start difference. First operand 484 states and 1612 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:59,199 INFO L93 Difference]: Finished difference Result 671 states and 2053 transitions. [2021-06-05 22:11:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:11:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:59,200 INFO L225 Difference]: With dead ends: 671 [2021-06-05 22:11:59,200 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 22:11:59,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 22:11:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 484. [2021-06-05 22:11:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.3374741200828155) internal successors, (1612), 483 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1612 transitions. [2021-06-05 22:11:59,208 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1612 transitions. Word has length 18 [2021-06-05 22:11:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:59,208 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1612 transitions. [2021-06-05 22:11:59,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1612 transitions. [2021-06-05 22:11:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:11:59,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:59,209 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:59,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-05 22:11:59,209 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1430498957, now seen corresponding path program 1 times [2021-06-05 22:11:59,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:59,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539754389] [2021-06-05 22:11:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:11:59,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:59,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539754389] [2021-06-05 22:11:59,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539754389] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:59,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:59,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:59,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853042294] [2021-06-05 22:11:59,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:59,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:59,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:59,242 INFO L87 Difference]: Start difference. First operand 484 states and 1612 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:59,315 INFO L93 Difference]: Finished difference Result 852 states and 2589 transitions. [2021-06-05 22:11:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:11:59,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:11:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:59,316 INFO L225 Difference]: With dead ends: 852 [2021-06-05 22:11:59,316 INFO L226 Difference]: Without dead ends: 778 [2021-06-05 22:11:59,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:11:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-05 22:11:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 484. [2021-06-05 22:11:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.320910973084886) internal successors, (1604), 483 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1604 transitions. [2021-06-05 22:11:59,324 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1604 transitions. Word has length 18 [2021-06-05 22:11:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:59,324 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1604 transitions. [2021-06-05 22:11:59,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1604 transitions. [2021-06-05 22:11:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:11:59,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:59,325 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:59,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-05 22:11:59,325 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1664376435, now seen corresponding path program 2 times [2021-06-05 22:11:59,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:59,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945386823] [2021-06-05 22:11:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:59,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:59,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945386823] [2021-06-05 22:11:59,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945386823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:59,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082216088] [2021-06-05 22:11:59,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:59,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-06-05 22:11:59,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:11:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:59,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:11:59,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:11:59,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:11:59,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,524 INFO L628 ElimStorePlain]: treesize reduction 34, result has 29.2 percent of original size [2021-06-05 22:11:59,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:59,524 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:71, output treesize:16 [2021-06-05 22:11:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:11:59,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082216088] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:59,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:11:59,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-06-05 22:11:59,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110316015] [2021-06-05 22:11:59,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:11:59,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:11:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:11:59,545 INFO L87 Difference]: Start difference. First operand 484 states and 1604 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:59,590 INFO L93 Difference]: Finished difference Result 732 states and 2196 transitions. [2021-06-05 22:11:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:59,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:11:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:59,592 INFO L225 Difference]: With dead ends: 732 [2021-06-05 22:11:59,592 INFO L226 Difference]: Without dead ends: 703 [2021-06-05 22:11:59,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-05 22:11:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 484. [2021-06-05 22:11:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.3022774327122155) internal successors, (1595), 483 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1595 transitions. [2021-06-05 22:11:59,599 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1595 transitions. Word has length 18 [2021-06-05 22:11:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:59,600 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1595 transitions. [2021-06-05 22:11:59,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1595 transitions. [2021-06-05 22:11:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:11:59,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:59,600 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:59,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:59,813 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:59,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1681246645, now seen corresponding path program 1 times [2021-06-05 22:11:59,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:59,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472783352] [2021-06-05 22:11:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:11:59,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:59,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472783352] [2021-06-05 22:11:59,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472783352] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:11:59,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:11:59,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:11:59,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977303937] [2021-06-05 22:11:59,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:11:59,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:59,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:11:59,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:11:59,851 INFO L87 Difference]: Start difference. First operand 484 states and 1595 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:59,931 INFO L93 Difference]: Finished difference Result 671 states and 2072 transitions. [2021-06-05 22:11:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:11:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:11:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:59,932 INFO L225 Difference]: With dead ends: 671 [2021-06-05 22:11:59,932 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 22:11:59,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:11:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 22:11:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 492. [2021-06-05 22:11:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.3136456211812626) internal successors, (1627), 491 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1627 transitions. [2021-06-05 22:11:59,961 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1627 transitions. Word has length 18 [2021-06-05 22:11:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:59,961 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1627 transitions. [2021-06-05 22:11:59,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1627 transitions. [2021-06-05 22:11:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:11:59,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:59,962 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:59,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-05 22:11:59,962 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:59,963 INFO L82 PathProgramCache]: Analyzing trace with hash -7330485, now seen corresponding path program 1 times [2021-06-05 22:11:59,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:59,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074648743] [2021-06-05 22:11:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074648743] [2021-06-05 22:12:00,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074648743] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:12:00,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270915197] [2021-06-05 22:12:00,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:12:00,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:12:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:00,008 INFO L87 Difference]: Start difference. First operand 492 states and 1627 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,087 INFO L93 Difference]: Finished difference Result 750 states and 2306 transitions. [2021-06-05 22:12:00,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:00,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,089 INFO L225 Difference]: With dead ends: 750 [2021-06-05 22:12:00,089 INFO L226 Difference]: Without dead ends: 697 [2021-06-05 22:12:00,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-06-05 22:12:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 496. [2021-06-05 22:12:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.319191919191919) internal successors, (1643), 495 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1643 transitions. [2021-06-05 22:12:00,095 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1643 transitions. Word has length 18 [2021-06-05 22:12:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,095 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1643 transitions. [2021-06-05 22:12:00,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1643 transitions. [2021-06-05 22:12:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:00,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,096 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-05 22:12:00,097 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1646195509, now seen corresponding path program 2 times [2021-06-05 22:12:00,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736551289] [2021-06-05 22:12:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736551289] [2021-06-05 22:12:00,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736551289] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:00,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924709439] [2021-06-05 22:12:00,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:00,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:00,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:00,123 INFO L87 Difference]: Start difference. First operand 496 states and 1643 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,210 INFO L93 Difference]: Finished difference Result 806 states and 2470 transitions. [2021-06-05 22:12:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,212 INFO L225 Difference]: With dead ends: 806 [2021-06-05 22:12:00,212 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 22:12:00,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 22:12:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 496. [2021-06-05 22:12:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.303030303030303) internal successors, (1635), 495 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1635 transitions. [2021-06-05 22:12:00,220 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1635 transitions. Word has length 18 [2021-06-05 22:12:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,220 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1635 transitions. [2021-06-05 22:12:00,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1635 transitions. [2021-06-05 22:12:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:00,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,221 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-05 22:12:00,221 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1406905333, now seen corresponding path program 2 times [2021-06-05 22:12:00,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996982902] [2021-06-05 22:12:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996982902] [2021-06-05 22:12:00,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996982902] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:00,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384238512] [2021-06-05 22:12:00,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:00,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:00,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:00,270 INFO L87 Difference]: Start difference. First operand 496 states and 1635 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,380 INFO L93 Difference]: Finished difference Result 747 states and 2277 transitions. [2021-06-05 22:12:00,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,398 INFO L225 Difference]: With dead ends: 747 [2021-06-05 22:12:00,398 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 22:12:00,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 22:12:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 496. [2021-06-05 22:12:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.294949494949495) internal successors, (1631), 495 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1631 transitions. [2021-06-05 22:12:00,405 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1631 transitions. Word has length 18 [2021-06-05 22:12:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,406 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1631 transitions. [2021-06-05 22:12:00,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1631 transitions. [2021-06-05 22:12:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:00,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,407 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-05 22:12:00,407 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,407 INFO L82 PathProgramCache]: Analyzing trace with hash 700897977, now seen corresponding path program 1 times [2021-06-05 22:12:00,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641139874] [2021-06-05 22:12:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641139874] [2021-06-05 22:12:00,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641139874] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:00,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058013176] [2021-06-05 22:12:00,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:00,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:00,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:00,437 INFO L87 Difference]: Start difference. First operand 496 states and 1631 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,487 INFO L93 Difference]: Finished difference Result 771 states and 2360 transitions. [2021-06-05 22:12:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,489 INFO L225 Difference]: With dead ends: 771 [2021-06-05 22:12:00,489 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 22:12:00,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 22:12:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 496. [2021-06-05 22:12:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.286868686868687) internal successors, (1627), 495 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1627 transitions. [2021-06-05 22:12:00,495 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1627 transitions. Word has length 18 [2021-06-05 22:12:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,496 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1627 transitions. [2021-06-05 22:12:00,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1627 transitions. [2021-06-05 22:12:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:00,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,497 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-05 22:12:00,497 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1763906343, now seen corresponding path program 2 times [2021-06-05 22:12:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670300728] [2021-06-05 22:12:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670300728] [2021-06-05 22:12:00,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670300728] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:00,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048850044] [2021-06-05 22:12:00,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:00,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:00,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:00,519 INFO L87 Difference]: Start difference. First operand 496 states and 1627 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,580 INFO L93 Difference]: Finished difference Result 908 states and 2716 transitions. [2021-06-05 22:12:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,582 INFO L225 Difference]: With dead ends: 908 [2021-06-05 22:12:00,582 INFO L226 Difference]: Without dead ends: 855 [2021-06-05 22:12:00,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-06-05 22:12:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 492. [2021-06-05 22:12:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.2892057026476578) internal successors, (1615), 491 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1615 transitions. [2021-06-05 22:12:00,591 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1615 transitions. Word has length 18 [2021-06-05 22:12:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,591 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1615 transitions. [2021-06-05 22:12:00,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1615 transitions. [2021-06-05 22:12:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:00,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,592 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-05 22:12:00,592 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1399083479, now seen corresponding path program 1 times [2021-06-05 22:12:00,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72213710] [2021-06-05 22:12:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72213710] [2021-06-05 22:12:00,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72213710] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:12:00,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468866481] [2021-06-05 22:12:00,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:12:00,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:12:00,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:00,643 INFO L87 Difference]: Start difference. First operand 492 states and 1615 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,727 INFO L93 Difference]: Finished difference Result 839 states and 2564 transitions. [2021-06-05 22:12:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:00,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,729 INFO L225 Difference]: With dead ends: 839 [2021-06-05 22:12:00,729 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 22:12:00,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 22:12:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 496. [2021-06-05 22:12:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.2747474747474747) internal successors, (1621), 495 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1621 transitions. [2021-06-05 22:12:00,736 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1621 transitions. Word has length 18 [2021-06-05 22:12:00,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,736 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1621 transitions. [2021-06-05 22:12:00,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,736 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1621 transitions. [2021-06-05 22:12:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:00,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,737 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-05 22:12:00,737 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash 506049385, now seen corresponding path program 2 times [2021-06-05 22:12:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966712919] [2021-06-05 22:12:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966712919] [2021-06-05 22:12:00,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966712919] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:12:00,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276555305] [2021-06-05 22:12:00,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:12:00,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:12:00,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:00,778 INFO L87 Difference]: Start difference. First operand 496 states and 1621 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,838 INFO L93 Difference]: Finished difference Result 841 states and 2567 transitions. [2021-06-05 22:12:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,839 INFO L225 Difference]: With dead ends: 841 [2021-06-05 22:12:00,839 INFO L226 Difference]: Without dead ends: 784 [2021-06-05 22:12:00,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-06-05 22:12:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 492. [2021-06-05 22:12:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.285132382892057) internal successors, (1613), 491 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1613 transitions. [2021-06-05 22:12:00,846 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1613 transitions. Word has length 18 [2021-06-05 22:12:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,846 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1613 transitions. [2021-06-05 22:12:00,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1613 transitions. [2021-06-05 22:12:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:00,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,847 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-05 22:12:00,847 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1823737981, now seen corresponding path program 3 times [2021-06-05 22:12:00,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414331512] [2021-06-05 22:12:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414331512] [2021-06-05 22:12:00,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414331512] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:00,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670586301] [2021-06-05 22:12:00,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:00,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:00,867 INFO L87 Difference]: Start difference. First operand 492 states and 1613 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,914 INFO L93 Difference]: Finished difference Result 679 states and 2068 transitions. [2021-06-05 22:12:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:00,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,916 INFO L225 Difference]: With dead ends: 679 [2021-06-05 22:12:00,916 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 22:12:00,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 22:12:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 492. [2021-06-05 22:12:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.2769857433808554) internal successors, (1609), 491 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1609 transitions. [2021-06-05 22:12:00,922 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1609 transitions. Word has length 18 [2021-06-05 22:12:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,922 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1609 transitions. [2021-06-05 22:12:00,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1609 transitions. [2021-06-05 22:12:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:00,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,923 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-05 22:12:00,923 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1398789765, now seen corresponding path program 2 times [2021-06-05 22:12:00,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633773865] [2021-06-05 22:12:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:00,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633773865] [2021-06-05 22:12:00,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633773865] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:00,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:00,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:00,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892623777] [2021-06-05 22:12:00,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:00,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:00,949 INFO L87 Difference]: Start difference. First operand 492 states and 1609 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:01,006 INFO L93 Difference]: Finished difference Result 667 states and 2040 transitions. [2021-06-05 22:12:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:01,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:01,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:01,008 INFO L225 Difference]: With dead ends: 667 [2021-06-05 22:12:01,008 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 22:12:01,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 22:12:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 492. [2021-06-05 22:12:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.2688391038696536) internal successors, (1605), 491 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1605 transitions. [2021-06-05 22:12:01,014 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1605 transitions. Word has length 18 [2021-06-05 22:12:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:01,014 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1605 transitions. [2021-06-05 22:12:01,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1605 transitions. [2021-06-05 22:12:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:01,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:01,015 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:01,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-05 22:12:01,015 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:01,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1415879781, now seen corresponding path program 3 times [2021-06-05 22:12:01,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:01,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423194497] [2021-06-05 22:12:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:01,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:01,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423194497] [2021-06-05 22:12:01,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423194497] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:01,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:01,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:12:01,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136034642] [2021-06-05 22:12:01,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:12:01,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:01,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:12:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:12:01,030 INFO L87 Difference]: Start difference. First operand 492 states and 1605 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:01,078 INFO L93 Difference]: Finished difference Result 600 states and 1821 transitions. [2021-06-05 22:12:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:01,079 INFO L225 Difference]: With dead ends: 600 [2021-06-05 22:12:01,080 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 22:12:01,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 22:12:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 435. [2021-06-05 22:12:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.2119815668202767) internal successors, (1394), 434 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1394 transitions. [2021-06-05 22:12:01,087 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1394 transitions. Word has length 18 [2021-06-05 22:12:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:01,087 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1394 transitions. [2021-06-05 22:12:01,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1394 transitions. [2021-06-05 22:12:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:01,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:01,088 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:01,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-05 22:12:01,088 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1243069021, now seen corresponding path program 4 times [2021-06-05 22:12:01,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:01,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374632189] [2021-06-05 22:12:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:01,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:01,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374632189] [2021-06-05 22:12:01,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374632189] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:01,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:01,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:01,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65337590] [2021-06-05 22:12:01,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:01,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:01,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:01,109 INFO L87 Difference]: Start difference. First operand 435 states and 1394 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:01,164 INFO L93 Difference]: Finished difference Result 586 states and 1771 transitions. [2021-06-05 22:12:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:01,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:01,165 INFO L225 Difference]: With dead ends: 586 [2021-06-05 22:12:01,165 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 22:12:01,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 22:12:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 435. [2021-06-05 22:12:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1912442396313363) internal successors, (1385), 434 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1385 transitions. [2021-06-05 22:12:01,171 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1385 transitions. Word has length 18 [2021-06-05 22:12:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:01,172 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1385 transitions. [2021-06-05 22:12:01,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1385 transitions. [2021-06-05 22:12:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:01,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:01,173 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:01,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-06-05 22:12:01,173 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:01,173 INFO L82 PathProgramCache]: Analyzing trace with hash -567012709, now seen corresponding path program 4 times [2021-06-05 22:12:01,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:01,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397829762] [2021-06-05 22:12:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:01,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397829762] [2021-06-05 22:12:01,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397829762] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:01,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:01,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:12:01,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908980395] [2021-06-05 22:12:01,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:12:01,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:12:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:12:01,187 INFO L87 Difference]: Start difference. First operand 435 states and 1385 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:01,216 INFO L93 Difference]: Finished difference Result 512 states and 1571 transitions. [2021-06-05 22:12:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:12:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:01,230 INFO L225 Difference]: With dead ends: 512 [2021-06-05 22:12:01,230 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 22:12:01,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 22:12:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 435. [2021-06-05 22:12:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1797235023041477) internal successors, (1380), 434 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1380 transitions. [2021-06-05 22:12:01,238 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1380 transitions. Word has length 18 [2021-06-05 22:12:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:01,238 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1380 transitions. [2021-06-05 22:12:01,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1380 transitions. [2021-06-05 22:12:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:01,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:01,239 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:01,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-05 22:12:01,240 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:01,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1059721977, now seen corresponding path program 3 times [2021-06-05 22:12:01,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:01,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619073569] [2021-06-05 22:12:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:01,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:01,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619073569] [2021-06-05 22:12:01,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619073569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:01,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103089487] [2021-06-05 22:12:01,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:01,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-06-05 22:12:01,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:01,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:12:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:01,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:12:01,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:01,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:12:01,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:01,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:12:01,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:01,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:12:01,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:01,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:01,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:01,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:189, output treesize:161 [2021-06-05 22:12:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:01,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103089487] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:01,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:12:01,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2021-06-05 22:12:01,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165559364] [2021-06-05 22:12:01,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:12:01,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:01,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:12:01,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:12:01,563 INFO L87 Difference]: Start difference. First operand 435 states and 1380 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:01,691 INFO L93 Difference]: Finished difference Result 587 states and 1717 transitions. [2021-06-05 22:12:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:01,692 INFO L225 Difference]: With dead ends: 587 [2021-06-05 22:12:01,692 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 22:12:01,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:12:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 22:12:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 398. [2021-06-05 22:12:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.146095717884131) internal successors, (1249), 397 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1249 transitions. [2021-06-05 22:12:01,698 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1249 transitions. Word has length 18 [2021-06-05 22:12:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:01,698 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1249 transitions. [2021-06-05 22:12:01,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1249 transitions. [2021-06-05 22:12:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:01,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:01,699 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:01,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:01,917 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1838197275, now seen corresponding path program 3 times [2021-06-05 22:12:01,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:01,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367097877] [2021-06-05 22:12:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:01,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:01,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367097877] [2021-06-05 22:12:01,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367097877] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:01,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:01,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:01,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810641349] [2021-06-05 22:12:01,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:01,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:01,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:01,947 INFO L87 Difference]: Start difference. First operand 398 states and 1249 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:02,025 INFO L93 Difference]: Finished difference Result 670 states and 1949 transitions. [2021-06-05 22:12:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:02,026 INFO L225 Difference]: With dead ends: 670 [2021-06-05 22:12:02,026 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 22:12:02,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 22:12:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 398. [2021-06-05 22:12:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.123425692695214) internal successors, (1240), 397 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1240 transitions. [2021-06-05 22:12:02,031 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1240 transitions. Word has length 18 [2021-06-05 22:12:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:02,032 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1240 transitions. [2021-06-05 22:12:02,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1240 transitions. [2021-06-05 22:12:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:02,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:02,032 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:02,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-06-05 22:12:02,032 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:02,033 INFO L82 PathProgramCache]: Analyzing trace with hash -197121861, now seen corresponding path program 4 times [2021-06-05 22:12:02,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:02,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955758963] [2021-06-05 22:12:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:02,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:02,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955758963] [2021-06-05 22:12:02,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955758963] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:02,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:02,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:02,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117542349] [2021-06-05 22:12:02,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:02,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:02,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:02,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:02,060 INFO L87 Difference]: Start difference. First operand 398 states and 1240 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:02,139 INFO L93 Difference]: Finished difference Result 625 states and 1812 transitions. [2021-06-05 22:12:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:02,140 INFO L225 Difference]: With dead ends: 625 [2021-06-05 22:12:02,141 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 22:12:02,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 22:12:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 402. [2021-06-05 22:12:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1321695760598502) internal successors, (1256), 401 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1256 transitions. [2021-06-05 22:12:02,146 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1256 transitions. Word has length 18 [2021-06-05 22:12:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:02,146 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1256 transitions. [2021-06-05 22:12:02,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1256 transitions. [2021-06-05 22:12:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:02,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:02,146 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:02,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-06-05 22:12:02,147 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash -951688453, now seen corresponding path program 4 times [2021-06-05 22:12:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:02,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778063295] [2021-06-05 22:12:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:02,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778063295] [2021-06-05 22:12:02,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778063295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165133862] [2021-06-05 22:12:02,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:02,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:02,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:12:02,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:02,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:12:02,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,351 INFO L628 ElimStorePlain]: treesize reduction 68, result has 51.4 percent of original size [2021-06-05 22:12:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:02,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:02,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:12:02,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:02,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:02,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:02,371 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:149, output treesize:42 [2021-06-05 22:12:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:02,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165133862] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:02,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:12:02,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2021-06-05 22:12:02,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255476210] [2021-06-05 22:12:02,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:12:02,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:02,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:12:02,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:12:02,402 INFO L87 Difference]: Start difference. First operand 402 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:02,464 INFO L93 Difference]: Finished difference Result 517 states and 1522 transitions. [2021-06-05 22:12:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:02,465 INFO L225 Difference]: With dead ends: 517 [2021-06-05 22:12:02,465 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 22:12:02,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:12:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 22:12:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 402. [2021-06-05 22:12:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.119700748129676) internal successors, (1251), 401 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1251 transitions. [2021-06-05 22:12:02,470 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1251 transitions. Word has length 18 [2021-06-05 22:12:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:02,471 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1251 transitions. [2021-06-05 22:12:02,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1251 transitions. [2021-06-05 22:12:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:02,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:02,471 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:02,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:02,681 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash -22925917, now seen corresponding path program 3 times [2021-06-05 22:12:02,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:02,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176277860] [2021-06-05 22:12:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:02,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:02,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176277860] [2021-06-05 22:12:02,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176277860] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:02,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:02,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:02,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554398450] [2021-06-05 22:12:02,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:02,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:02,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:02,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:02,708 INFO L87 Difference]: Start difference. First operand 402 states and 1251 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:02,790 INFO L93 Difference]: Finished difference Result 660 states and 1900 transitions. [2021-06-05 22:12:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:02,791 INFO L225 Difference]: With dead ends: 660 [2021-06-05 22:12:02,791 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 22:12:02,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 22:12:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 386. [2021-06-05 22:12:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.083116883116883) internal successors, (1187), 385 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1187 transitions. [2021-06-05 22:12:02,796 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1187 transitions. Word has length 18 [2021-06-05 22:12:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:02,796 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1187 transitions. [2021-06-05 22:12:02,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1187 transitions. [2021-06-05 22:12:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:02,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:02,796 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:02,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-06-05 22:12:02,797 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:02,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1939653789, now seen corresponding path program 5 times [2021-06-05 22:12:02,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:02,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13509077] [2021-06-05 22:12:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:02,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:02,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13509077] [2021-06-05 22:12:02,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13509077] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:02,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:02,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:02,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332012396] [2021-06-05 22:12:02,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:02,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:02,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:02,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:02,835 INFO L87 Difference]: Start difference. First operand 386 states and 1187 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:02,941 INFO L93 Difference]: Finished difference Result 656 states and 1884 transitions. [2021-06-05 22:12:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:02,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:02,942 INFO L225 Difference]: With dead ends: 656 [2021-06-05 22:12:02,942 INFO L226 Difference]: Without dead ends: 603 [2021-06-05 22:12:02,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-06-05 22:12:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 386. [2021-06-05 22:12:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0727272727272728) internal successors, (1183), 385 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1183 transitions. [2021-06-05 22:12:02,948 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1183 transitions. Word has length 18 [2021-06-05 22:12:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:02,948 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1183 transitions. [2021-06-05 22:12:02,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1183 transitions. [2021-06-05 22:12:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:02,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:02,948 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:02,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-06-05 22:12:02,948 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1583210651, now seen corresponding path program 6 times [2021-06-05 22:12:02,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:02,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142832617] [2021-06-05 22:12:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:02,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:02,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142832617] [2021-06-05 22:12:02,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142832617] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:02,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:02,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:12:02,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814461552] [2021-06-05 22:12:02,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:12:02,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:12:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:02,991 INFO L87 Difference]: Start difference. First operand 386 states and 1183 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:03,112 INFO L93 Difference]: Finished difference Result 614 states and 1768 transitions. [2021-06-05 22:12:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:12:03,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:03,114 INFO L225 Difference]: With dead ends: 614 [2021-06-05 22:12:03,114 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 22:12:03,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:12:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 22:12:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 366. [2021-06-05 22:12:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.021917808219178) internal successors, (1103), 365 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1103 transitions. [2021-06-05 22:12:03,118 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1103 transitions. Word has length 18 [2021-06-05 22:12:03,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:03,118 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1103 transitions. [2021-06-05 22:12:03,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1103 transitions. [2021-06-05 22:12:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:03,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:03,119 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:03,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-06-05 22:12:03,119 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2018274873, now seen corresponding path program 4 times [2021-06-05 22:12:03,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:03,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998193010] [2021-06-05 22:12:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:03,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:03,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998193010] [2021-06-05 22:12:03,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998193010] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:03,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:03,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:12:03,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794358825] [2021-06-05 22:12:03,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:12:03,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:03,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:12:03,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:12:03,146 INFO L87 Difference]: Start difference. First operand 366 states and 1103 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:03,216 INFO L93 Difference]: Finished difference Result 594 states and 1712 transitions. [2021-06-05 22:12:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:03,217 INFO L225 Difference]: With dead ends: 594 [2021-06-05 22:12:03,217 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 22:12:03,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 22:12:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 366. [2021-06-05 22:12:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.010958904109589) internal successors, (1099), 365 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1099 transitions. [2021-06-05 22:12:03,222 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1099 transitions. Word has length 18 [2021-06-05 22:12:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:03,222 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1099 transitions. [2021-06-05 22:12:03,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1099 transitions. [2021-06-05 22:12:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:03,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:03,223 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:03,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-06-05 22:12:03,223 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:03,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1406977863, now seen corresponding path program 5 times [2021-06-05 22:12:03,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:03,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367117942] [2021-06-05 22:12:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:03,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367117942] [2021-06-05 22:12:03,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367117942] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:03,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:03,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:12:03,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024457107] [2021-06-05 22:12:03,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:12:03,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:03,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:12:03,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:03,261 INFO L87 Difference]: Start difference. First operand 366 states and 1099 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:03,317 INFO L93 Difference]: Finished difference Result 697 states and 2027 transitions. [2021-06-05 22:12:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:03,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:03,318 INFO L225 Difference]: With dead ends: 697 [2021-06-05 22:12:03,318 INFO L226 Difference]: Without dead ends: 623 [2021-06-05 22:12:03,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-06-05 22:12:03,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 366. [2021-06-05 22:12:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9972602739726026) internal successors, (1094), 365 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1094 transitions. [2021-06-05 22:12:03,323 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1094 transitions. Word has length 18 [2021-06-05 22:12:03,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:03,323 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1094 transitions. [2021-06-05 22:12:03,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1094 transitions. [2021-06-05 22:12:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:03,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:03,323 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:03,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-06-05 22:12:03,324 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:03,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1216302301, now seen corresponding path program 3 times [2021-06-05 22:12:03,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:03,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136204033] [2021-06-05 22:12:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:03,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:03,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136204033] [2021-06-05 22:12:03,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136204033] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:03,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:03,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 22:12:03,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532352976] [2021-06-05 22:12:03,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:12:03,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:12:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:12:03,393 INFO L87 Difference]: Start difference. First operand 366 states and 1094 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:03,482 INFO L93 Difference]: Finished difference Result 719 states and 2083 transitions. [2021-06-05 22:12:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:12:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:03,483 INFO L225 Difference]: With dead ends: 719 [2021-06-05 22:12:03,483 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 22:12:03,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:12:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 22:12:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 366. [2021-06-05 22:12:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.989041095890411) internal successors, (1091), 365 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1091 transitions. [2021-06-05 22:12:03,488 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1091 transitions. Word has length 18 [2021-06-05 22:12:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:03,488 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1091 transitions. [2021-06-05 22:12:03,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1091 transitions. [2021-06-05 22:12:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:03,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:03,489 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:03,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-06-05 22:12:03,489 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash -797807489, now seen corresponding path program 6 times [2021-06-05 22:12:03,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:03,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460254057] [2021-06-05 22:12:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:03,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:03,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460254057] [2021-06-05 22:12:03,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460254057] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:03,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:12:03,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:12:03,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899046372] [2021-06-05 22:12:03,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:12:03,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:03,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:12:03,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:03,542 INFO L87 Difference]: Start difference. First operand 366 states and 1091 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:03,599 INFO L93 Difference]: Finished difference Result 639 states and 1854 transitions. [2021-06-05 22:12:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:12:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:03,600 INFO L225 Difference]: With dead ends: 639 [2021-06-05 22:12:03,600 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 22:12:03,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:12:03,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 22:12:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 359. [2021-06-05 22:12:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.0083798882681565) internal successors, (1077), 358 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1077 transitions. [2021-06-05 22:12:03,605 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1077 transitions. Word has length 18 [2021-06-05 22:12:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:03,605 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1077 transitions. [2021-06-05 22:12:03,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1077 transitions. [2021-06-05 22:12:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:03,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:03,605 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:03,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-06-05 22:12:03,605 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:03,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2015137509, now seen corresponding path program 5 times [2021-06-05 22:12:03,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:03,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671837284] [2021-06-05 22:12:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:03,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:03,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671837284] [2021-06-05 22:12:03,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671837284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:03,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063676434] [2021-06-05 22:12:03,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:03,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:03,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:12:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:03,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:12:03,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:12:03,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:03,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:03,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:32, output treesize:16 [2021-06-05 22:12:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:03,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063676434] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:03,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:12:03,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-06-05 22:12:03,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833918490] [2021-06-05 22:12:03,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:12:03,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:03,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:12:03,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:12:03,774 INFO L87 Difference]: Start difference. First operand 359 states and 1077 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:03,800 INFO L93 Difference]: Finished difference Result 384 states and 1115 transitions. [2021-06-05 22:12:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:12:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:03,801 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:12:03,801 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:12:03,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:12:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:12:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 357. [2021-06-05 22:12:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.00561797752809) internal successors, (1070), 356 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1070 transitions. [2021-06-05 22:12:03,805 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1070 transitions. Word has length 18 [2021-06-05 22:12:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:03,805 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1070 transitions. [2021-06-05 22:12:03,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1070 transitions. [2021-06-05 22:12:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:03,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:03,805 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:04,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 22:12:04,007 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:04,007 INFO L82 PathProgramCache]: Analyzing trace with hash 325544227, now seen corresponding path program 5 times [2021-06-05 22:12:04,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:04,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50229783] [2021-06-05 22:12:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:04,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:04,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50229783] [2021-06-05 22:12:04,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50229783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:04,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188307639] [2021-06-05 22:12:04,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:04,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:04,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:04,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:12:04,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:04,268 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 22:12:04,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:04,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:04,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:04,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:12:04,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:12:04,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:04,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:12:04,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:04,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:04,417 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:178, output treesize:130 [2021-06-05 22:12:04,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:12:04,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,500 INFO L628 ElimStorePlain]: treesize reduction 13, result has 7.1 percent of original size [2021-06-05 22:12:04,500 INFO L518 ElimStorePlain]: Eliminatee last_index_of_7 vanished before elimination [2021-06-05 22:12:04,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:1 [2021-06-05 22:12:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:04,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188307639] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:04,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:12:04,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-06-05 22:12:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580591261] [2021-06-05 22:12:04,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:12:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:12:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:12:04,508 INFO L87 Difference]: Start difference. First operand 357 states and 1070 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:04,685 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 22:12:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:04,704 INFO L93 Difference]: Finished difference Result 422 states and 1218 transitions. [2021-06-05 22:12:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:12:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:04,705 INFO L225 Difference]: With dead ends: 422 [2021-06-05 22:12:04,705 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:12:04,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:12:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:12:04,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 359. [2021-06-05 22:12:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.9972067039106145) internal successors, (1073), 358 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1073 transitions. [2021-06-05 22:12:04,709 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1073 transitions. Word has length 18 [2021-06-05 22:12:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:04,709 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1073 transitions. [2021-06-05 22:12:04,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1073 transitions. [2021-06-05 22:12:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:12:04,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:04,710 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:04,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:04,910 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:04,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1561485447, now seen corresponding path program 6 times [2021-06-05 22:12:04,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:04,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233780157] [2021-06-05 22:12:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:04,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:04,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233780157] [2021-06-05 22:12:04,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233780157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:04,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763759893] [2021-06-05 22:12:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:05,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-06-05 22:12:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:12:05,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:05,150 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 22:12:05,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:12:05,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:05,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:12:05,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:05,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:05,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:12:05,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:12:05,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:05,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:05,301 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:174, output treesize:119 [2021-06-05 22:12:05,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:12:05,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,383 INFO L628 ElimStorePlain]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 22:12:05,383 INFO L518 ElimStorePlain]: Eliminatee index_of_8 vanished before elimination [2021-06-05 22:12:05,383 INFO L518 ElimStorePlain]: Eliminatee last_index_of_7 vanished before elimination [2021-06-05 22:12:05,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:12:05,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:1 [2021-06-05 22:12:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763759893] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:12:05,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:12:05,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-06-05 22:12:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918497833] [2021-06-05 22:12:05,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:12:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:12:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:12:05,390 INFO L87 Difference]: Start difference. First operand 359 states and 1073 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:05,568 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 22:12:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:05,577 INFO L93 Difference]: Finished difference Result 369 states and 1088 transitions. [2021-06-05 22:12:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:12:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:12:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:05,578 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:12:05,578 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:12:05,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:12:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:12:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-06-05 22:12:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.002808988764045) internal successors, (1069), 356 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1069 transitions. [2021-06-05 22:12:05,582 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1069 transitions. Word has length 18 [2021-06-05 22:12:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:05,582 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1069 transitions. [2021-06-05 22:12:05,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1069 transitions. [2021-06-05 22:12:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:05,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:05,582 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:05,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 22:12:05,783 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:05,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156678, now seen corresponding path program 1 times [2021-06-05 22:12:05,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:05,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620703035] [2021-06-05 22:12:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:05,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620703035] [2021-06-05 22:12:05,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620703035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844252601] [2021-06-05 22:12:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:05,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:12:05,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:06,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844252601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:06,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:06,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:12:06,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941592811] [2021-06-05 22:12:06,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:06,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:06,035 INFO L87 Difference]: Start difference. First operand 357 states and 1069 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:06,221 INFO L93 Difference]: Finished difference Result 468 states and 1395 transitions. [2021-06-05 22:12:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:12:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:06,222 INFO L225 Difference]: With dead ends: 468 [2021-06-05 22:12:06,222 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 22:12:06,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 22:12:06,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 383. [2021-06-05 22:12:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.0) internal successors, (1146), 382 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1146 transitions. [2021-06-05 22:12:06,226 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1146 transitions. Word has length 20 [2021-06-05 22:12:06,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:06,226 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1146 transitions. [2021-06-05 22:12:06,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1146 transitions. [2021-06-05 22:12:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:06,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:06,227 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:06,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 22:12:06,437 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 301436920, now seen corresponding path program 2 times [2021-06-05 22:12:06,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:06,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516230442] [2021-06-05 22:12:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:06,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516230442] [2021-06-05 22:12:06,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516230442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41761769] [2021-06-05 22:12:06,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:06,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:12:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:06,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41761769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:06,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:06,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:12:06,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855221613] [2021-06-05 22:12:06,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:06,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:06,737 INFO L87 Difference]: Start difference. First operand 383 states and 1146 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:07,554 INFO L93 Difference]: Finished difference Result 677 states and 1973 transitions. [2021-06-05 22:12:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:12:07,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:07,555 INFO L225 Difference]: With dead ends: 677 [2021-06-05 22:12:07,555 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 22:12:07,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 672.3ms TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:12:07,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 22:12:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 388. [2021-06-05 22:12:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.0258397932816536) internal successors, (1171), 387 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1171 transitions. [2021-06-05 22:12:07,560 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1171 transitions. Word has length 20 [2021-06-05 22:12:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:07,560 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1171 transitions. [2021-06-05 22:12:07,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1171 transitions. [2021-06-05 22:12:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:07,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:07,560 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:07,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:07,761 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1134434440, now seen corresponding path program 3 times [2021-06-05 22:12:07,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:07,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139428868] [2021-06-05 22:12:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:07,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:07,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139428868] [2021-06-05 22:12:07,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139428868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:07,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811415092] [2021-06-05 22:12:07,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:07,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:12:07,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:07,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:12:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:08,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811415092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:08,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:08,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:12:08,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143017959] [2021-06-05 22:12:08,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:08,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:08,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:08,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:08,069 INFO L87 Difference]: Start difference. First operand 388 states and 1171 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:08,291 INFO L93 Difference]: Finished difference Result 456 states and 1345 transitions. [2021-06-05 22:12:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:12:08,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:08,292 INFO L225 Difference]: With dead ends: 456 [2021-06-05 22:12:08,292 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 22:12:08,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 22:12:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 403. [2021-06-05 22:12:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0248756218905473) internal successors, (1216), 402 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1216 transitions. [2021-06-05 22:12:08,296 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1216 transitions. Word has length 20 [2021-06-05 22:12:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:08,296 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1216 transitions. [2021-06-05 22:12:08,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1216 transitions. [2021-06-05 22:12:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:08,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:08,297 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:08,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 22:12:08,513 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash 464235032, now seen corresponding path program 4 times [2021-06-05 22:12:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:08,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100710040] [2021-06-05 22:12:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:08,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:08,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100710040] [2021-06-05 22:12:08,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100710040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:08,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774719632] [2021-06-05 22:12:08,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:08,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:08,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:08,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:12:08,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:08,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:08,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:08,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:08,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:08,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:08,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:08,655 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:08,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:08,660 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:08,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:08,666 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:08,669 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:08,672 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:08,674 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:08,677 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:08,723 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.0 percent of original size [2021-06-05 22:12:08,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:08,724 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:381, output treesize:73 [2021-06-05 22:12:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:08,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774719632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:08,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:08,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:12:08,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998041497] [2021-06-05 22:12:08,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:12:08,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:08,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:12:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:12:08,938 INFO L87 Difference]: Start difference. First operand 403 states and 1216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:09,136 INFO L93 Difference]: Finished difference Result 487 states and 1453 transitions. [2021-06-05 22:12:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:12:09,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:09,137 INFO L225 Difference]: With dead ends: 487 [2021-06-05 22:12:09,137 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 22:12:09,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:12:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 22:12:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 403. [2021-06-05 22:12:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0248756218905473) internal successors, (1216), 402 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1216 transitions. [2021-06-05 22:12:09,142 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1216 transitions. Word has length 20 [2021-06-05 22:12:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:09,142 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1216 transitions. [2021-06-05 22:12:09,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1216 transitions. [2021-06-05 22:12:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:09,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:09,143 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:09,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 22:12:09,357 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash 812620716, now seen corresponding path program 5 times [2021-06-05 22:12:09,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:09,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279847954] [2021-06-05 22:12:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:09,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:09,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279847954] [2021-06-05 22:12:09,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279847954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:09,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719361010] [2021-06-05 22:12:09,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:09,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:09,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:09,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:12:09,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:09,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719361010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:09,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:09,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:12:09,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171969356] [2021-06-05 22:12:09,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:09,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:09,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:09,598 INFO L87 Difference]: Start difference. First operand 403 states and 1216 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:09,932 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 22:12:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:11,146 INFO L93 Difference]: Finished difference Result 1085 states and 3198 transitions. [2021-06-05 22:12:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:12:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:11,148 INFO L225 Difference]: With dead ends: 1085 [2021-06-05 22:12:11,148 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 22:12:11,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1201.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:12:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 22:12:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 492. [2021-06-05 22:12:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.0529531568228108) internal successors, (1499), 491 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1499 transitions. [2021-06-05 22:12:11,155 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1499 transitions. Word has length 20 [2021-06-05 22:12:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:11,155 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1499 transitions. [2021-06-05 22:12:11,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1499 transitions. [2021-06-05 22:12:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:11,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:11,156 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:11,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:11,358 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash -363485782, now seen corresponding path program 6 times [2021-06-05 22:12:11,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:11,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765079257] [2021-06-05 22:12:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:11,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:11,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765079257] [2021-06-05 22:12:11,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765079257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:11,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173391774] [2021-06-05 22:12:11,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:11,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:12:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:12:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:12,491 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9, v_prenex_1], 1=[char_at_5]} [2021-06-05 22:12:12,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:12,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:12,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,520 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,528 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:12,533 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:12,542 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:12,546 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,550 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:12,555 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,559 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,563 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,568 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,572 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,576 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,579 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,583 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,586 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,590 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,594 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,597 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,601 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,605 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,608 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,612 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,616 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,619 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,622 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,625 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,629 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,632 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,635 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,638 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,642 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,645 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,719 INFO L628 ElimStorePlain]: treesize reduction 81, result has 56.9 percent of original size [2021-06-05 22:12:12,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:12,723 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:12,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:12,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:12,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:12,756 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:12,759 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:12,762 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:12,788 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.3 percent of original size [2021-06-05 22:12:12,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:12,789 INFO L247 ElimStorePlain]: Needed 43 recursive calls to eliminate 4 variables, input treesize:1439, output treesize:20 [2021-06-05 22:12:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:12,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173391774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:12,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:12,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:12:12,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881396917] [2021-06-05 22:12:12,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:12:12,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:12:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:12:12,845 INFO L87 Difference]: Start difference. First operand 492 states and 1499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:13,039 INFO L93 Difference]: Finished difference Result 619 states and 1845 transitions. [2021-06-05 22:12:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:12:13,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:13,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:13,040 INFO L225 Difference]: With dead ends: 619 [2021-06-05 22:12:13,040 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 22:12:13,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 22:12:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 528. [2021-06-05 22:12:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.0550284629981026) internal successors, (1610), 527 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1610 transitions. [2021-06-05 22:12:13,046 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1610 transitions. Word has length 20 [2021-06-05 22:12:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:13,046 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1610 transitions. [2021-06-05 22:12:13,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1610 transitions. [2021-06-05 22:12:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:13,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:13,047 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:13,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 22:12:13,249 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:13,250 INFO L82 PathProgramCache]: Analyzing trace with hash 88283152, now seen corresponding path program 7 times [2021-06-05 22:12:13,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:13,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700538127] [2021-06-05 22:12:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:13,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:13,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700538127] [2021-06-05 22:12:13,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700538127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:13,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668505886] [2021-06-05 22:12:13,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:12:13,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:15,375 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9, v_prenex_2], 1=[char_at_5]} [2021-06-05 22:12:15,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:15,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:15,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:15,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:15,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,923 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 53 [2021-06-05 22:12:15,923 INFO L628 ElimStorePlain]: treesize reduction 2220, result has 17.7 percent of original size [2021-06-05 22:12:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:15,928 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:15,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:15,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:15,941 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:15,946 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:15,950 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:15,954 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:15,958 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:15,962 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:15,965 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:15,969 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:15,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:15,972 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,098 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 22:12:16,099 INFO L628 ElimStorePlain]: treesize reduction 106, result has 62.1 percent of original size [2021-06-05 22:12:16,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:16,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:16,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:16,109 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:16,112 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:16,116 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,119 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,123 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,169 INFO L628 ElimStorePlain]: treesize reduction 46, result has 56.2 percent of original size [2021-06-05 22:12:16,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:16,170 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 4 variables, input treesize:2821, output treesize:35 [2021-06-05 22:12:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:16,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668505886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:16,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:16,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:12:16,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520396536] [2021-06-05 22:12:16,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:12:16,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:16,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:12:16,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:12:16,256 INFO L87 Difference]: Start difference. First operand 528 states and 1610 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:16,504 INFO L93 Difference]: Finished difference Result 691 states and 2082 transitions. [2021-06-05 22:12:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:12:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:16,505 INFO L225 Difference]: With dead ends: 691 [2021-06-05 22:12:16,505 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 22:12:16,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 22:12:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 528. [2021-06-05 22:12:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.0550284629981026) internal successors, (1610), 527 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1610 transitions. [2021-06-05 22:12:16,511 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1610 transitions. Word has length 20 [2021-06-05 22:12:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:16,511 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1610 transitions. [2021-06-05 22:12:16,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1610 transitions. [2021-06-05 22:12:16,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:16,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:16,512 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:16,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:16,729 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1695565943, now seen corresponding path program 1 times [2021-06-05 22:12:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807598156] [2021-06-05 22:12:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:16,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:16,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807598156] [2021-06-05 22:12:16,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807598156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:16,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475606519] [2021-06-05 22:12:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:16,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:16,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:16,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:16,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:16,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,902 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:16,907 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,910 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,915 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,918 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,921 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,927 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,932 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,934 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,937 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,939 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:16,942 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:16,987 INFO L628 ElimStorePlain]: treesize reduction 25, result has 73.4 percent of original size [2021-06-05 22:12:16,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:16,988 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:595, output treesize:69 [2021-06-05 22:12:17,447 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_1]} [2021-06-05 22:12:17,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,468 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:17,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:17,478 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,494 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:17,499 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,503 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,507 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:17,512 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,516 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:17,521 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,525 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,529 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,533 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,537 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,542 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,546 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,550 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:17,554 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:17,559 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:17,564 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,568 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,572 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,576 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,579 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,583 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,586 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,590 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,593 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,597 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,601 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,604 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,607 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,610 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,614 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,616 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,703 INFO L628 ElimStorePlain]: treesize reduction 201, result has 34.1 percent of original size [2021-06-05 22:12:17,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:17,710 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:17,714 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:17,716 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:17,719 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:17,751 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 22:12:17,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:17,751 INFO L247 ElimStorePlain]: Needed 45 recursive calls to eliminate 2 variables, input treesize:1839, output treesize:50 [2021-06-05 22:12:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:17,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475606519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:17,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:17,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:12:17,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253779797] [2021-06-05 22:12:17,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:12:17,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:17,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:12:17,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:12:17,802 INFO L87 Difference]: Start difference. First operand 528 states and 1610 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:18,415 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-05 22:12:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:18,533 INFO L93 Difference]: Finished difference Result 631 states and 1867 transitions. [2021-06-05 22:12:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:18,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:18,534 INFO L225 Difference]: With dead ends: 631 [2021-06-05 22:12:18,534 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 22:12:18,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 765.3ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:12:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 22:12:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 500. [2021-06-05 22:12:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.064128256513026) internal successors, (1529), 499 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1529 transitions. [2021-06-05 22:12:18,540 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1529 transitions. Word has length 20 [2021-06-05 22:12:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:18,540 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1529 transitions. [2021-06-05 22:12:18,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1529 transitions. [2021-06-05 22:12:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:18,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:18,541 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:18,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 22:12:18,741 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:18,741 INFO L82 PathProgramCache]: Analyzing trace with hash 544548431, now seen corresponding path program 2 times [2021-06-05 22:12:18,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:18,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790584080] [2021-06-05 22:12:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:18,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:18,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790584080] [2021-06-05 22:12:18,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790584080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:18,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461760797] [2021-06-05 22:12:18,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:18,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:18,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:18,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:18,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:18,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:18,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:18,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:18,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:18,927 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,933 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,935 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,938 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,941 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,943 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,946 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,948 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:18,950 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:18,999 INFO L628 ElimStorePlain]: treesize reduction 67, result has 50.7 percent of original size [2021-06-05 22:12:19,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:19,000 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 1 variables, input treesize:529, output treesize:69 [2021-06-05 22:12:19,340 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_1]} [2021-06-05 22:12:19,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:19,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:19,369 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,373 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,377 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:19,381 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,390 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,393 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:19,398 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,402 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:19,406 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,410 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,429 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,433 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,437 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,440 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,444 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,448 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,451 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:19,456 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:19,462 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:19,466 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,470 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,474 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,478 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,481 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,485 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,488 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,492 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,495 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,499 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,502 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,505 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,508 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,511 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,514 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,603 INFO L628 ElimStorePlain]: treesize reduction 201, result has 34.1 percent of original size [2021-06-05 22:12:19,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:19,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:19,607 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:19,610 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:19,613 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:19,617 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:19,651 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 22:12:19,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:19,652 INFO L247 ElimStorePlain]: Needed 45 recursive calls to eliminate 2 variables, input treesize:1847, output treesize:50 [2021-06-05 22:12:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:19,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461760797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:19,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:19,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:12:19,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119042508] [2021-06-05 22:12:19,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:12:19,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:19,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:12:19,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:12:19,705 INFO L87 Difference]: Start difference. First operand 500 states and 1529 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:20,404 INFO L93 Difference]: Finished difference Result 651 states and 1931 transitions. [2021-06-05 22:12:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:20,405 INFO L225 Difference]: With dead ends: 651 [2021-06-05 22:12:20,405 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 22:12:20,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 752.2ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:12:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 22:12:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 510. [2021-06-05 22:12:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.0825147347740667) internal successors, (1569), 509 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1569 transitions. [2021-06-05 22:12:20,411 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1569 transitions. Word has length 20 [2021-06-05 22:12:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:20,411 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1569 transitions. [2021-06-05 22:12:20,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1569 transitions. [2021-06-05 22:12:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:20,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:20,412 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:20,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable801,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:20,625 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:20,625 INFO L82 PathProgramCache]: Analyzing trace with hash -540273895, now seen corresponding path program 3 times [2021-06-05 22:12:20,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:20,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262381618] [2021-06-05 22:12:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:20,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:20,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262381618] [2021-06-05 22:12:20,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262381618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:20,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359061119] [2021-06-05 22:12:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:20,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:12:20,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:20,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:20,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:20,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:20,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,827 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,833 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:20,837 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,841 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,844 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:20,848 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,851 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,854 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,857 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,860 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,864 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:20,867 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,952 INFO L628 ElimStorePlain]: treesize reduction 54, result has 67.3 percent of original size [2021-06-05 22:12:20,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:20,953 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:701, output treesize:111 [2021-06-05 22:12:21,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:21,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:21,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:21,207 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,211 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,215 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,219 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:21,223 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:21,227 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,230 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,234 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:21,241 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,244 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,248 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,251 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,255 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:21,259 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,262 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,267 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,270 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,273 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,276 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:21,280 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,282 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,285 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:21,289 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,388 INFO L628 ElimStorePlain]: treesize reduction 64, result has 68.8 percent of original size [2021-06-05 22:12:21,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:21,392 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:21,395 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:21,398 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,401 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,404 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,439 INFO L628 ElimStorePlain]: treesize reduction 22, result has 69.9 percent of original size [2021-06-05 22:12:21,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:21,440 INFO L247 ElimStorePlain]: Needed 34 recursive calls to eliminate 2 variables, input treesize:1033, output treesize:51 [2021-06-05 22:12:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:21,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359061119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:21,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:21,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:12:21,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152607064] [2021-06-05 22:12:21,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:12:21,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:12:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:12:21,497 INFO L87 Difference]: Start difference. First operand 510 states and 1569 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:21,791 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-06-05 22:12:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:21,995 INFO L93 Difference]: Finished difference Result 652 states and 1939 transitions. [2021-06-05 22:12:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:21,996 INFO L225 Difference]: With dead ends: 652 [2021-06-05 22:12:21,996 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 22:12:21,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 583.3ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 22:12:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 520. [2021-06-05 22:12:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.0809248554913293) internal successors, (1599), 519 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1599 transitions. [2021-06-05 22:12:22,001 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1599 transitions. Word has length 20 [2021-06-05 22:12:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:22,001 INFO L482 AbstractCegarLoop]: Abstraction has 520 states and 1599 transitions. [2021-06-05 22:12:22,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1599 transitions. [2021-06-05 22:12:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:22,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:22,002 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:22,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-06-05 22:12:22,202 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2035077431, now seen corresponding path program 4 times [2021-06-05 22:12:22,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:22,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480540747] [2021-06-05 22:12:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:22,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:22,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480540747] [2021-06-05 22:12:22,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480540747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:22,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533696478] [2021-06-05 22:12:22,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:22,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:22,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:22,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:22,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,466 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,470 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:22,474 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,478 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,481 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,485 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:22,489 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,492 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,496 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,499 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,502 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,505 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:22,507 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:22,597 INFO L628 ElimStorePlain]: treesize reduction 54, result has 67.3 percent of original size [2021-06-05 22:12:22,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:22,598 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:749, output treesize:111 [2021-06-05 22:12:23,264 INFO L446 ElimStorePlain]: Different costs {0=[char_at_5], 1=[char_at_1]} [2021-06-05 22:12:23,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:23,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:23,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,313 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,336 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,343 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,350 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,358 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:23,366 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,380 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,388 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,396 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,404 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,411 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,418 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,426 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,432 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,441 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,449 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,456 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,462 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,470 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,477 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,485 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,492 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:23,500 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,507 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,514 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,521 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,528 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,534 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,542 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,548 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,556 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,564 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,571 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,578 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,586 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,592 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,599 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:23,607 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,614 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,620 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,628 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,635 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,641 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,648 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,655 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,661 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,668 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,674 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,681 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,688 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,696 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,702 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,710 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,717 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,724 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,731 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,737 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,743 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,750 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,756 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,763 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,769 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,777 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,783 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,791 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,798 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,806 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,814 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,822 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,831 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,838 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,844 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,853 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,859 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:23,867 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,874 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,880 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,886 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,892 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,897 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,903 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,909 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,914 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,919 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,925 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,930 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:23,937 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,943 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,948 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,954 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,959 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,965 INFO L550 ElimStorePlain]: Start of recursive call 100: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,974 INFO L550 ElimStorePlain]: Start of recursive call 101: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,982 INFO L550 ElimStorePlain]: Start of recursive call 102: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,987 INFO L550 ElimStorePlain]: Start of recursive call 103: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,993 INFO L550 ElimStorePlain]: Start of recursive call 104: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:23,998 INFO L550 ElimStorePlain]: Start of recursive call 105: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,004 INFO L550 ElimStorePlain]: Start of recursive call 106: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,008 INFO L550 ElimStorePlain]: Start of recursive call 107: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,013 INFO L550 ElimStorePlain]: Start of recursive call 108: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,018 INFO L550 ElimStorePlain]: Start of recursive call 109: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,023 INFO L550 ElimStorePlain]: Start of recursive call 110: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,028 INFO L550 ElimStorePlain]: Start of recursive call 111: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,033 INFO L550 ElimStorePlain]: Start of recursive call 112: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,037 INFO L550 ElimStorePlain]: Start of recursive call 113: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,041 INFO L550 ElimStorePlain]: Start of recursive call 114: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,045 INFO L550 ElimStorePlain]: Start of recursive call 115: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,051 INFO L550 ElimStorePlain]: Start of recursive call 116: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,056 INFO L550 ElimStorePlain]: Start of recursive call 117: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,060 INFO L550 ElimStorePlain]: Start of recursive call 118: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,066 INFO L550 ElimStorePlain]: Start of recursive call 119: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,070 INFO L550 ElimStorePlain]: Start of recursive call 120: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,073 INFO L550 ElimStorePlain]: Start of recursive call 121: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,245 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 22:12:24,245 INFO L628 ElimStorePlain]: treesize reduction 208, result has 47.3 percent of original size [2021-06-05 22:12:24,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:24,251 INFO L550 ElimStorePlain]: Start of recursive call 122: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:24,254 INFO L550 ElimStorePlain]: Start of recursive call 123: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:24,257 INFO L550 ElimStorePlain]: Start of recursive call 124: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:24,261 INFO L550 ElimStorePlain]: Start of recursive call 125: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:24,265 INFO L550 ElimStorePlain]: Start of recursive call 126: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:24,268 INFO L550 ElimStorePlain]: Start of recursive call 127: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:24,333 INFO L628 ElimStorePlain]: treesize reduction 17, result has 84.0 percent of original size [2021-06-05 22:12:24,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:24,334 INFO L247 ElimStorePlain]: Needed 127 recursive calls to eliminate 2 variables, input treesize:6030, output treesize:89 [2021-06-05 22:12:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:24,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533696478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:24,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:24,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:12:24,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200613131] [2021-06-05 22:12:24,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:12:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:12:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:12:24,462 INFO L87 Difference]: Start difference. First operand 520 states and 1599 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:25,174 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-06-05 22:12:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:25,253 INFO L93 Difference]: Finished difference Result 778 states and 2293 transitions. [2021-06-05 22:12:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:12:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:25,256 INFO L225 Difference]: With dead ends: 778 [2021-06-05 22:12:25,256 INFO L226 Difference]: Without dead ends: 712 [2021-06-05 22:12:25,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 875.1ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:12:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-06-05 22:12:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 525. [2021-06-05 22:12:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.099236641221374) internal successors, (1624), 524 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1624 transitions. [2021-06-05 22:12:25,263 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1624 transitions. Word has length 20 [2021-06-05 22:12:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:25,263 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1624 transitions. [2021-06-05 22:12:25,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1624 transitions. [2021-06-05 22:12:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:25,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:25,264 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:25,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable922 [2021-06-05 22:12:25,464 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1065415511, now seen corresponding path program 5 times [2021-06-05 22:12:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:25,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193174246] [2021-06-05 22:12:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:25,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:25,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193174246] [2021-06-05 22:12:25,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193174246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411971557] [2021-06-05 22:12:25,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:25,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:25,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:25,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:25,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:25,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:25,706 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:25,709 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,712 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:25,716 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:25,719 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,722 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:25,725 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,728 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,731 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,733 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,736 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,739 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,742 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,744 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,747 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:25,793 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-05 22:12:25,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:25,793 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:606, output treesize:69 [2021-06-05 22:12:25,992 INFO L446 ElimStorePlain]: Different costs {0=[char_at_1], 1=[char_at_5]} [2021-06-05 22:12:25,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:25,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:26,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:26,019 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,031 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:26,036 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,040 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,044 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,048 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,056 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,060 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,064 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,068 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:26,072 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,076 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,080 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,084 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,087 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,091 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,094 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,098 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,101 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,105 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,108 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,112 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,115 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,118 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,121 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:26,125 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,128 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,131 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,134 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,137 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,140 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,231 INFO L628 ElimStorePlain]: treesize reduction 72, result has 66.0 percent of original size [2021-06-05 22:12:26,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:26,236 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:26,239 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:26,242 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:26,245 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,283 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 22:12:26,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:26,284 INFO L247 ElimStorePlain]: Needed 43 recursive calls to eliminate 2 variables, input treesize:1777, output treesize:62 [2021-06-05 22:12:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:26,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411971557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:26,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:26,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:12:26,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845713865] [2021-06-05 22:12:26,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:26,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:26,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:26,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:26,346 INFO L87 Difference]: Start difference. First operand 525 states and 1624 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:27,778 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-05 22:12:28,231 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-05 22:12:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:29,015 INFO L93 Difference]: Finished difference Result 766 states and 2247 transitions. [2021-06-05 22:12:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:12:29,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:29,016 INFO L225 Difference]: With dead ends: 766 [2021-06-05 22:12:29,016 INFO L226 Difference]: Without dead ends: 599 [2021-06-05 22:12:29,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 2516.4ms TimeCoverageRelationStatistics Valid=572, Invalid=2080, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:12:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-05 22:12:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 515. [2021-06-05 22:12:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.1070038910505837) internal successors, (1597), 514 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1597 transitions. [2021-06-05 22:12:29,021 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1597 transitions. Word has length 20 [2021-06-05 22:12:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:29,022 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1597 transitions. [2021-06-05 22:12:29,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1597 transitions. [2021-06-05 22:12:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:29,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:29,022 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:29,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:29,223 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:29,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1999997275, now seen corresponding path program 6 times [2021-06-05 22:12:29,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:29,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158784630] [2021-06-05 22:12:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:29,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:29,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158784630] [2021-06-05 22:12:29,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158784630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:29,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469395778] [2021-06-05 22:12:29,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:29,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:29,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:29,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:29,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:29,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:29,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:29,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:29,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:29,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,496 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,499 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,502 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,507 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,510 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,513 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,516 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,518 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,521 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,577 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 22:12:29,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:29,578 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 1 variables, input treesize:583, output treesize:81 [2021-06-05 22:12:29,923 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_1]} [2021-06-05 22:12:29,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:29,949 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,953 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,961 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:29,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:29,977 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,981 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,985 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,988 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:29,993 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:29,997 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,002 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,006 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:30,011 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,016 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,020 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,023 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,027 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,031 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,035 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,039 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,043 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,046 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,050 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,053 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:30,057 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,061 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:30,065 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,068 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,158 INFO L628 ElimStorePlain]: treesize reduction 193, result has 35.0 percent of original size [2021-06-05 22:12:30,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:30,162 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:30,165 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:30,167 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:30,170 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,201 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 22:12:30,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:30,202 INFO L247 ElimStorePlain]: Needed 41 recursive calls to eliminate 2 variables, input treesize:1785, output treesize:50 [2021-06-05 22:12:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:30,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469395778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:30,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:30,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:12:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241967736] [2021-06-05 22:12:30,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:30,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:30,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:30,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:30,261 INFO L87 Difference]: Start difference. First operand 515 states and 1597 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:30,884 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 22:12:31,290 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2021-06-05 22:12:31,914 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 22:12:32,411 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 22:12:32,827 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-06-05 22:12:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:32,852 INFO L93 Difference]: Finished difference Result 934 states and 2715 transitions. [2021-06-05 22:12:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:12:32,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:32,853 INFO L225 Difference]: With dead ends: 934 [2021-06-05 22:12:32,853 INFO L226 Difference]: Without dead ends: 788 [2021-06-05 22:12:32,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2497.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1772, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:12:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-06-05 22:12:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 562. [2021-06-05 22:12:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 3.128342245989305) internal successors, (1755), 561 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1755 transitions. [2021-06-05 22:12:32,860 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1755 transitions. Word has length 20 [2021-06-05 22:12:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:32,860 INFO L482 AbstractCegarLoop]: Abstraction has 562 states and 1755 transitions. [2021-06-05 22:12:32,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1755 transitions. [2021-06-05 22:12:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:32,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:32,861 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:33,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-06-05 22:12:33,063 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:33,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1351621415, now seen corresponding path program 7 times [2021-06-05 22:12:33,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:33,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318892623] [2021-06-05 22:12:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:33,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:33,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318892623] [2021-06-05 22:12:33,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318892623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:33,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438327459] [2021-06-05 22:12:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:33,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:33,257 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,260 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:33,263 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,271 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,274 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,276 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,279 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,282 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,284 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,287 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,289 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,292 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,294 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,296 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,338 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-05 22:12:33,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:33,339 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:615, output treesize:69 [2021-06-05 22:12:33,635 INFO L446 ElimStorePlain]: Different costs {0=[char_at_1], 1=[char_at_5]} [2021-06-05 22:12:33,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,674 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,693 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:33,699 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,706 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,714 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,720 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,727 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,734 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,742 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,748 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,754 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,760 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,765 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,771 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:33,778 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,787 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,794 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,801 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,807 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,812 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,818 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,824 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:33,830 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,836 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:33,842 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,848 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,864 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,869 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,875 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,880 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,885 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:33,890 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,895 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:33,901 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,906 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,911 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,916 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,920 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,925 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,931 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,935 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,940 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,945 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,949 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,954 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,958 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,963 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,967 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,972 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,977 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,981 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:33,986 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,991 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,995 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,999 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,003 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:34,008 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,012 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,019 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,023 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,027 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,031 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,035 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,039 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,043 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,047 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,051 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,065 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,070 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,290 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 22:12:34,290 INFO L628 ElimStorePlain]: treesize reduction 273, result has 51.7 percent of original size [2021-06-05 22:12:34,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:34,298 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:34,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:34,302 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,305 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:34,308 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:34,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:34,312 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:34,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:34,316 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:34,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:34,320 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,323 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,420 INFO L628 ElimStorePlain]: treesize reduction 47, result has 72.8 percent of original size [2021-06-05 22:12:34,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:12:34,421 INFO L247 ElimStorePlain]: Needed 85 recursive calls to eliminate 2 variables, input treesize:3641, output treesize:126 [2021-06-05 22:12:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:34,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438327459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:34,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:34,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:12:34,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468007560] [2021-06-05 22:12:34,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:34,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:34,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:34,573 INFO L87 Difference]: Start difference. First operand 562 states and 1755 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:35,329 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 22:12:35,505 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 22:12:35,833 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 22:12:36,250 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 22:12:36,653 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 22:12:36,796 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 22:12:37,048 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 22:12:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:37,258 INFO L93 Difference]: Finished difference Result 996 states and 2848 transitions. [2021-06-05 22:12:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:12:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:37,260 INFO L225 Difference]: With dead ends: 996 [2021-06-05 22:12:37,260 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 22:12:37,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 2567.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1597, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:12:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 22:12:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 610. [2021-06-05 22:12:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.187192118226601) internal successors, (1941), 609 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1941 transitions. [2021-06-05 22:12:37,267 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1941 transitions. Word has length 20 [2021-06-05 22:12:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:37,268 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1941 transitions. [2021-06-05 22:12:37,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1941 transitions. [2021-06-05 22:12:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:37,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:37,268 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:37,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1203 [2021-06-05 22:12:37,483 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1848321991, now seen corresponding path program 8 times [2021-06-05 22:12:37,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:37,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978596705] [2021-06-05 22:12:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:37,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978596705] [2021-06-05 22:12:37,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978596705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:37,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329448415] [2021-06-05 22:12:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:37,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:37,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:37,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:37,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:37,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:37,706 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,712 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,717 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,720 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,723 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,725 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,728 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,731 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,733 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:37,736 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,739 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,742 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,744 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,809 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.4 percent of original size [2021-06-05 22:12:37,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:37,810 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:691, output treesize:89 [2021-06-05 22:12:37,965 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_1]} [2021-06-05 22:12:37,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:37,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:37,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:37,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:37,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,016 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:38,023 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,029 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,037 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,043 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,049 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,055 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,062 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,068 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,074 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,102 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,107 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,112 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,117 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,123 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,128 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:38,134 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,140 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:38,147 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,153 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,158 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,164 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,170 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,176 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,182 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,187 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,192 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,197 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,203 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,208 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,213 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,220 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,225 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,230 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,236 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,242 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,247 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,252 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,258 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,263 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,269 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,275 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,279 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,284 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,289 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,293 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,297 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,303 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,308 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,312 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,317 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,322 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,327 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,331 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,336 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,340 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,344 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,349 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,353 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,358 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,362 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,367 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,371 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,375 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,379 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,383 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,387 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,391 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,395 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,399 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,403 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,408 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,411 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,415 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,419 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,423 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,426 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,429 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,588 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 22:12:38,588 INFO L628 ElimStorePlain]: treesize reduction 257, result has 42.4 percent of original size [2021-06-05 22:12:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,593 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,596 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,599 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:38,603 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:38,606 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:38,609 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:38,673 INFO L628 ElimStorePlain]: treesize reduction 19, result has 82.4 percent of original size [2021-06-05 22:12:38,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:38,675 INFO L247 ElimStorePlain]: Needed 92 recursive calls to eliminate 2 variables, input treesize:4226, output treesize:89 [2021-06-05 22:12:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:38,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329448415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:38,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:38,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:12:38,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248585026] [2021-06-05 22:12:38,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:38,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:38,788 INFO L87 Difference]: Start difference. First operand 610 states and 1941 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:39,302 INFO L93 Difference]: Finished difference Result 850 states and 2546 transitions. [2021-06-05 22:12:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:12:39,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:39,304 INFO L225 Difference]: With dead ends: 850 [2021-06-05 22:12:39,304 INFO L226 Difference]: Without dead ends: 635 [2021-06-05 22:12:39,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-05 22:12:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 588. [2021-06-05 22:12:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.151618398637138) internal successors, (1850), 587 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1850 transitions. [2021-06-05 22:12:39,312 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1850 transitions. Word has length 20 [2021-06-05 22:12:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:39,313 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1850 transitions. [2021-06-05 22:12:39,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1850 transitions. [2021-06-05 22:12:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:39,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:39,313 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:39,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1259,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:39,525 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1551384113, now seen corresponding path program 9 times [2021-06-05 22:12:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:39,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506761998] [2021-06-05 22:12:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:39,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:39,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506761998] [2021-06-05 22:12:39,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506761998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:39,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526365311] [2021-06-05 22:12:39,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:39,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:12:39,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:39,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:39,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:39,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:39,776 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:39,779 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:39,785 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:39,788 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,791 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,793 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,796 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:39,799 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,802 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,804 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,807 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,809 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:39,812 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:39,857 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-05 22:12:39,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:39,858 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:549, output treesize:69 [2021-06-05 22:12:40,275 INFO L446 ElimStorePlain]: Different costs {0=[char_at_1], 1=[char_at_5]} [2021-06-05 22:12:40,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:40,346 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,352 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,358 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,364 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,371 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,376 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,382 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,387 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,393 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,399 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,405 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,411 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,417 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,423 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,428 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,434 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,440 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,446 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,450 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,457 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,462 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,467 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,472 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,477 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,482 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,488 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,492 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,498 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,518 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,523 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,529 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,533 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,538 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,543 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,548 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,553 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,558 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,563 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,568 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,573 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,578 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,582 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,587 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,591 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,597 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,602 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,606 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,611 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,616 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,621 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,625 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,629 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,634 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,639 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,643 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,648 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,652 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,656 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,659 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,663 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,667 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,671 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,886 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 22:12:40,886 INFO L628 ElimStorePlain]: treesize reduction 273, result has 51.7 percent of original size [2021-06-05 22:12:40,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,892 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,896 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,900 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:40,903 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:40,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,907 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:40,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,911 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:40,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:40,915 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:40,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:40,918 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:41,006 INFO L628 ElimStorePlain]: treesize reduction 47, result has 72.8 percent of original size [2021-06-05 22:12:41,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:12:41,007 INFO L247 ElimStorePlain]: Needed 79 recursive calls to eliminate 2 variables, input treesize:3371, output treesize:126 [2021-06-05 22:12:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:41,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526365311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:41,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:41,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:12:41,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690975539] [2021-06-05 22:12:41,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:41,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:41,138 INFO L87 Difference]: Start difference. First operand 588 states and 1850 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:41,613 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 22:12:42,569 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 22:12:42,961 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 22:12:43,298 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 22:12:43,714 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 22:12:44,022 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 22:12:44,175 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-06-05 22:12:44,312 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-05 22:12:44,593 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 22:12:44,735 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-05 22:12:44,907 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2021-06-05 22:12:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:44,922 INFO L93 Difference]: Finished difference Result 1090 states and 3333 transitions. [2021-06-05 22:12:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:12:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:44,924 INFO L225 Difference]: With dead ends: 1090 [2021-06-05 22:12:44,924 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 22:12:44,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 3623.8ms TimeCoverageRelationStatistics Valid=620, Invalid=2802, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:12:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 22:12:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 591. [2021-06-05 22:12:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1254237288135593) internal successors, (1844), 590 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1844 transitions. [2021-06-05 22:12:44,931 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1844 transitions. Word has length 20 [2021-06-05 22:12:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:44,931 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1844 transitions. [2021-06-05 22:12:44,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1844 transitions. [2021-06-05 22:12:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:44,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:44,932 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:45,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1300 [2021-06-05 22:12:45,132 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1346669705, now seen corresponding path program 10 times [2021-06-05 22:12:45,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:45,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779166583] [2021-06-05 22:12:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:45,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:45,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779166583] [2021-06-05 22:12:45,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779166583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:45,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099640594] [2021-06-05 22:12:45,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:45,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:45,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:45,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:45,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:45,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:45,329 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:45,333 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,336 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:45,339 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:45,345 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,348 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:45,352 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,354 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,357 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,360 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,363 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,366 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,449 INFO L628 ElimStorePlain]: treesize reduction 60, result has 64.5 percent of original size [2021-06-05 22:12:45,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:45,450 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 1 variables, input treesize:619, output treesize:109 [2021-06-05 22:12:45,869 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_5]} [2021-06-05 22:12:45,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:45,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,894 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,899 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:45,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:45,909 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,914 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,919 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,927 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,932 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,937 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,941 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,946 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,960 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:45,966 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,970 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,974 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,978 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,982 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:45,987 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,991 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:45,995 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,000 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,005 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:46,010 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,014 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:46,019 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,022 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,026 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,030 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,034 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,039 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,043 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,047 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,051 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,055 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,059 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,062 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,066 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,069 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,073 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,077 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,080 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,084 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,087 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,090 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,094 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,097 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,101 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,104 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,106 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,110 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,113 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,116 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,119 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,199 INFO L628 ElimStorePlain]: treesize reduction 99, result has 53.1 percent of original size [2021-06-05 22:12:46,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:46,202 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,205 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:46,207 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:46,210 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:46,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:46,232 INFO L247 ElimStorePlain]: Needed 63 recursive calls to eliminate 2 variables, input treesize:2350, output treesize:61 [2021-06-05 22:12:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:46,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099640594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:46,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:46,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:12:46,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556635006] [2021-06-05 22:12:46,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:46,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:46,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:46,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:46,289 INFO L87 Difference]: Start difference. First operand 591 states and 1844 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,542 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 22:12:47,676 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 22:12:48,124 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 22:12:48,261 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 22:12:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:49,601 INFO L93 Difference]: Finished difference Result 1190 states and 3544 transitions. [2021-06-05 22:12:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:12:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:49,603 INFO L225 Difference]: With dead ends: 1190 [2021-06-05 22:12:49,603 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 22:12:49,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 3061.2ms TimeCoverageRelationStatistics Valid=593, Invalid=3439, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:12:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 22:12:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 638. [2021-06-05 22:12:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 3.1130298273155415) internal successors, (1983), 637 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1983 transitions. [2021-06-05 22:12:49,610 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1983 transitions. Word has length 20 [2021-06-05 22:12:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:49,610 INFO L482 AbstractCegarLoop]: Abstraction has 638 states and 1983 transitions. [2021-06-05 22:12:49,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1983 transitions. [2021-06-05 22:12:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:49,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:49,611 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:49,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:49,812 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1379623715, now seen corresponding path program 11 times [2021-06-05 22:12:49,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:49,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225675951] [2021-06-05 22:12:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:49,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:49,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225675951] [2021-06-05 22:12:49,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225675951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:49,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704332648] [2021-06-05 22:12:49,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:49,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:49,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:50,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:50,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:50,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,074 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,077 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:50,085 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,088 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,091 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,094 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,097 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,101 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,103 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,106 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:50,110 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,113 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,115 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,118 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,123 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,191 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.4 percent of original size [2021-06-05 22:12:50,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:50,192 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:651, output treesize:99 [2021-06-05 22:12:50,478 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_5]} [2021-06-05 22:12:50,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:50,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,516 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,536 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,544 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,552 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,559 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,565 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,572 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,579 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,587 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,594 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:50,607 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,614 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,622 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,630 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,638 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,644 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,651 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:50,659 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,666 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,673 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,680 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,688 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:50,695 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,702 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,709 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,716 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,723 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,730 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,737 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:50,746 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,753 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,759 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,765 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,771 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,777 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,784 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,789 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,796 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,803 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,809 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,815 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,821 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,827 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,833 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,839 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,845 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,851 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,857 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,863 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,869 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,875 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,880 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:50,887 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,892 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,899 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,905 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,911 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,917 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,922 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,928 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,933 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,939 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,943 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,949 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,953 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,959 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,963 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:50,969 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,973 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,979 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,984 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,989 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,994 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,999 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,003 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,008 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,013 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,017 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,021 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,025 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,030 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,034 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,038 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,041 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,262 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 22:12:51,263 INFO L628 ElimStorePlain]: treesize reduction 241, result has 54.8 percent of original size [2021-06-05 22:12:51,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:51,268 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:51,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:51,274 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:51,278 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:51,281 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,284 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:51,288 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:51,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:51,292 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,295 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,385 INFO L628 ElimStorePlain]: treesize reduction 47, result has 72.8 percent of original size [2021-06-05 22:12:51,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:12:51,386 INFO L247 ElimStorePlain]: Needed 99 recursive calls to eliminate 2 variables, input treesize:4508, output treesize:126 [2021-06-05 22:12:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:51,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704332648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:51,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:51,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:12:51,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756924207] [2021-06-05 22:12:51,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:51,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:51,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:51,520 INFO L87 Difference]: Start difference. First operand 638 states and 1983 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:51,910 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 22:12:52,281 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 22:12:52,661 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 22:12:53,081 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 22:12:53,249 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 22:12:53,546 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 22:12:53,672 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 22:12:53,905 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 22:12:54,087 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 22:12:54,253 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 22:12:54,411 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 22:12:54,542 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 22:12:54,715 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 22:12:54,966 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 22:12:55,136 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 22:12:55,306 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 22:12:55,459 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 22:12:55,621 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-05 22:12:55,822 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 22:12:56,007 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 22:12:56,185 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 22:12:56,353 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 22:12:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:56,636 INFO L93 Difference]: Finished difference Result 1766 states and 5020 transitions. [2021-06-05 22:12:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:12:56,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:12:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:56,638 INFO L225 Difference]: With dead ends: 1766 [2021-06-05 22:12:56,638 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 22:12:56,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 4843.6ms TimeCoverageRelationStatistics Valid=953, Invalid=3079, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:12:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 22:12:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 693. [2021-06-05 22:12:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.153179190751445) internal successors, (2182), 692 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2182 transitions. [2021-06-05 22:12:56,648 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2182 transitions. Word has length 20 [2021-06-05 22:12:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:56,649 INFO L482 AbstractCegarLoop]: Abstraction has 693 states and 2182 transitions. [2021-06-05 22:12:56,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2182 transitions. [2021-06-05 22:12:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:12:56,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:56,650 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:56,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-06-05 22:12:56,850 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:56,850 INFO L82 PathProgramCache]: Analyzing trace with hash 969949795, now seen corresponding path program 12 times [2021-06-05 22:12:56,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:56,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089587599] [2021-06-05 22:12:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:56,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:56,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089587599] [2021-06-05 22:12:56,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089587599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:56,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206726922] [2021-06-05 22:12:56,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:56,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:12:56,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:12:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:57,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:57,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:57,074 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,076 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,079 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,082 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:57,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,091 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,094 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,099 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:57,102 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,105 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,108 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,122 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,125 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:57,129 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,131 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,189 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.5 percent of original size [2021-06-05 22:12:57,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:57,190 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:601, output treesize:86 [2021-06-05 22:12:58,054 INFO L446 ElimStorePlain]: Different costs {0=[char_at_5], 1=[char_at_1]} [2021-06-05 22:12:58,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,098 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:58,106 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,113 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,127 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,133 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,146 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,152 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,158 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:58,165 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,171 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,178 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,184 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:12:58,191 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,197 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,204 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,210 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,216 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,222 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:58,229 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,235 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,242 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:58,249 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,254 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,261 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,266 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,273 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,278 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,284 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,291 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,296 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,301 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,307 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:58,313 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,318 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,324 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:58,331 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,337 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,343 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,349 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,355 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:58,361 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,367 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,372 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,378 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,383 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,388 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,393 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,398 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,403 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,408 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:58,414 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,420 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,425 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,430 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,436 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,441 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,446 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,452 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,456 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,461 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,466 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,471 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,476 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,480 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,485 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,490 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,495 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,500 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,504 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,509 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,514 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,518 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,522 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,527 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,531 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,535 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,539 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,543 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,547 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,551 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,555 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,559 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:58,564 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,568 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,571 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,575 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,578 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,730 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 22:12:58,730 INFO L628 ElimStorePlain]: treesize reduction 237, result has 44.4 percent of original size [2021-06-05 22:12:58,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:58,735 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:58,738 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:58,742 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:58,745 INFO L550 ElimStorePlain]: Start of recursive call 100: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:58,749 INFO L550 ElimStorePlain]: Start of recursive call 101: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,751 INFO L550 ElimStorePlain]: Start of recursive call 102: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,816 INFO L628 ElimStorePlain]: treesize reduction 19, result has 82.4 percent of original size [2021-06-05 22:12:58,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:12:58,818 INFO L247 ElimStorePlain]: Needed 102 recursive calls to eliminate 2 variables, input treesize:4571, output treesize:89 [2021-06-05 22:12:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:58,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206726922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:58,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:58,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:12:58,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856625744] [2021-06-05 22:12:58,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:12:58,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:12:58,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:12:58,943 INFO L87 Difference]: Start difference. First operand 693 states and 2182 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:59,484 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 22:12:59,663 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 22:12:59,826 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 22:12:59,974 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 22:13:00,093 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 22:13:00,346 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-06-05 22:13:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:00,504 INFO L93 Difference]: Finished difference Result 1038 states and 3090 transitions. [2021-06-05 22:13:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:13:00,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:00,505 INFO L225 Difference]: With dead ends: 1038 [2021-06-05 22:13:00,505 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 22:13:00,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1616.3ms TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:13:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 22:13:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 704. [2021-06-05 22:13:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.155049786628734) internal successors, (2218), 703 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2218 transitions. [2021-06-05 22:13:00,513 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2218 transitions. Word has length 20 [2021-06-05 22:13:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:00,513 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2218 transitions. [2021-06-05 22:13:00,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2218 transitions. [2021-06-05 22:13:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:00,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:00,515 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:00,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1621 [2021-06-05 22:13:00,715 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:00,715 INFO L82 PathProgramCache]: Analyzing trace with hash -641941827, now seen corresponding path program 13 times [2021-06-05 22:13:00,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:00,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623358713] [2021-06-05 22:13:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:00,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:00,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623358713] [2021-06-05 22:13:00,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623358713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:00,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726941488] [2021-06-05 22:13:00,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:13:00,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:01,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:01,039 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,042 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:01,046 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,052 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,056 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:01,059 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,063 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,066 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,069 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,072 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,075 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,078 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,080 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,083 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,166 INFO L628 ElimStorePlain]: treesize reduction 60, result has 64.5 percent of original size [2021-06-05 22:13:01,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:01,168 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:691, output treesize:109 [2021-06-05 22:13:01,459 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_5]} [2021-06-05 22:13:01,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:01,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,519 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,526 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,534 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,541 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,549 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,555 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,563 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,571 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,578 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:01,586 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,594 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,601 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,609 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,616 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,623 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,631 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,638 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,644 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:01,651 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,658 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,665 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:01,672 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,679 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,687 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,695 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,703 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,710 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,716 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,724 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,731 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,737 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,744 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,750 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,757 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,764 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,771 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,778 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,785 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,791 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,799 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,805 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,812 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,819 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,826 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,833 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,840 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,847 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,854 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,861 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,868 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,874 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,881 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,887 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,894 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,900 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:01,907 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,913 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,920 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,926 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,932 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,938 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,944 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,950 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,956 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,961 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,966 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,972 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,977 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,983 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,989 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:01,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:01,994 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,000 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,005 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:02,011 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,017 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,022 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,027 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,033 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,038 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,043 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,049 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,054 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,058 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,063 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,068 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,073 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,078 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,083 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,087 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,092 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,096 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,101 INFO L550 ElimStorePlain]: Start of recursive call 100: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,105 INFO L550 ElimStorePlain]: Start of recursive call 101: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,109 INFO L550 ElimStorePlain]: Start of recursive call 102: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,113 INFO L550 ElimStorePlain]: Start of recursive call 103: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,333 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 22:13:02,334 INFO L628 ElimStorePlain]: treesize reduction 244, result has 54.5 percent of original size [2021-06-05 22:13:02,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:02,339 INFO L550 ElimStorePlain]: Start of recursive call 104: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:02,343 INFO L550 ElimStorePlain]: Start of recursive call 105: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:02,347 INFO L550 ElimStorePlain]: Start of recursive call 106: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:02,351 INFO L550 ElimStorePlain]: Start of recursive call 107: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,354 INFO L550 ElimStorePlain]: Start of recursive call 108: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:02,358 INFO L550 ElimStorePlain]: Start of recursive call 109: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:02,362 INFO L550 ElimStorePlain]: Start of recursive call 110: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,365 INFO L550 ElimStorePlain]: Start of recursive call 111: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,454 INFO L628 ElimStorePlain]: treesize reduction 47, result has 72.8 percent of original size [2021-06-05 22:13:02,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:13:02,455 INFO L247 ElimStorePlain]: Needed 111 recursive calls to eliminate 2 variables, input treesize:5093, output treesize:126 [2021-06-05 22:13:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:02,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726941488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:02,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:02,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:13:02,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163384118] [2021-06-05 22:13:02,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:13:02,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:02,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:13:02,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:13:02,576 INFO L87 Difference]: Start difference. First operand 704 states and 2218 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:02,840 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-06-05 22:13:03,589 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 22:13:03,807 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 22:13:03,931 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 22:13:04,053 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 22:13:04,315 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 22:13:04,440 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 22:13:04,556 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-06-05 22:13:04,795 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 22:13:04,995 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 22:13:05,122 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 22:13:05,337 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 22:13:05,666 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-05 22:13:06,094 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 22:13:06,578 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 22:13:06,726 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 22:13:06,885 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-05 22:13:07,100 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 22:13:07,223 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 22:13:07,490 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-05 22:13:07,620 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-05 22:13:07,784 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 22:13:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:08,214 INFO L93 Difference]: Finished difference Result 1349 states and 3957 transitions. [2021-06-05 22:13:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:13:08,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:08,216 INFO L225 Difference]: With dead ends: 1349 [2021-06-05 22:13:08,216 INFO L226 Difference]: Without dead ends: 1130 [2021-06-05 22:13:08,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 5429.7ms TimeCoverageRelationStatistics Valid=799, Invalid=4031, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:13:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-06-05 22:13:08,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 747. [2021-06-05 22:13:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.175603217158177) internal successors, (2369), 746 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2369 transitions. [2021-06-05 22:13:08,225 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2369 transitions. Word has length 20 [2021-06-05 22:13:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:08,225 INFO L482 AbstractCegarLoop]: Abstraction has 747 states and 2369 transitions. [2021-06-05 22:13:08,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2369 transitions. [2021-06-05 22:13:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:08,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:08,226 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:08,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1920 [2021-06-05 22:13:08,427 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1486200768, now seen corresponding path program 8 times [2021-06-05 22:13:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:08,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661168643] [2021-06-05 22:13:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:08,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:08,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661168643] [2021-06-05 22:13:08,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661168643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:08,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849782300] [2021-06-05 22:13:08,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:08,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:08,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:13:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:08,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:08,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:08,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:08,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,699 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:08,702 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,709 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,712 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,715 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,718 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,721 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,724 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,727 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:08,730 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,733 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:08,737 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,739 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,742 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:08,746 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,748 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,748 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,751 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:08,753 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:08,824 INFO L628 ElimStorePlain]: treesize reduction 58, result has 62.6 percent of original size [2021-06-05 22:13:08,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:13:08,827 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 2 variables, input treesize:816, output treesize:89 [2021-06-05 22:13:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:09,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849782300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:09,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:09,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:13:09,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145926209] [2021-06-05 22:13:09,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:09,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:09,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:09,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:09,207 INFO L87 Difference]: Start difference. First operand 747 states and 2369 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:09,494 INFO L93 Difference]: Finished difference Result 856 states and 2664 transitions. [2021-06-05 22:13:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:13:09,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:09,496 INFO L225 Difference]: With dead ends: 856 [2021-06-05 22:13:09,496 INFO L226 Difference]: Without dead ends: 809 [2021-06-05 22:13:09,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-06-05 22:13:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 755. [2021-06-05 22:13:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.1856763925729443) internal successors, (2402), 754 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2402 transitions. [2021-06-05 22:13:09,503 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2402 transitions. Word has length 20 [2021-06-05 22:13:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:09,503 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2402 transitions. [2021-06-05 22:13:09,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2402 transitions. [2021-06-05 22:13:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:09,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:09,504 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:09,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1977,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:09,709 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1034431834, now seen corresponding path program 9 times [2021-06-05 22:13:09,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:09,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336282805] [2021-06-05 22:13:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:09,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:09,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336282805] [2021-06-05 22:13:09,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336282805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:09,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940601747] [2021-06-05 22:13:09,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:09,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:13:09,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:13:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:09,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:09,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:09,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:09,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:09,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,977 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,980 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,984 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,987 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,991 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:09,994 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:09,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:09,998 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:10,001 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:10,004 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:10,007 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:10,010 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:10,012 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:10,015 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,089 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.8 percent of original size [2021-06-05 22:13:10,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:13:10,092 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 2 variables, input treesize:710, output treesize:89 [2021-06-05 22:13:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:10,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:10,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:10,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:10,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:10,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:13:10,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:10,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:10,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:13:10,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:13:10,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,830 INFO L628 ElimStorePlain]: treesize reduction 240, result has 26.6 percent of original size [2021-06-05 22:13:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:10,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:10,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:10,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:10,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:10,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:10,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:10,907 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:440, output treesize:37 [2021-06-05 22:13:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:11,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940601747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:11,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:11,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:13:11,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835828907] [2021-06-05 22:13:11,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:11,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:11,001 INFO L87 Difference]: Start difference. First operand 755 states and 2402 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:11,277 INFO L93 Difference]: Finished difference Result 928 states and 2901 transitions. [2021-06-05 22:13:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:11,278 INFO L225 Difference]: With dead ends: 928 [2021-06-05 22:13:11,278 INFO L226 Difference]: Without dead ends: 881 [2021-06-05 22:13:11,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:13:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-06-05 22:13:11,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 739. [2021-06-05 22:13:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.176151761517615) internal successors, (2344), 738 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2344 transitions. [2021-06-05 22:13:11,286 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2344 transitions. Word has length 20 [2021-06-05 22:13:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:11,286 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2344 transitions. [2021-06-05 22:13:11,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2344 transitions. [2021-06-05 22:13:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:11,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:11,287 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:11,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2063,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:11,488 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:11,488 INFO L82 PathProgramCache]: Analyzing trace with hash 148568754, now seen corresponding path program 10 times [2021-06-05 22:13:11,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:11,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426351323] [2021-06-05 22:13:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:11,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:11,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426351323] [2021-06-05 22:13:11,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426351323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:11,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224181223] [2021-06-05 22:13:11,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:11,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:11,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:11,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:13:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:11,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:11,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:11,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:11,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:11,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,783 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,787 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,790 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:11,794 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,797 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:11,800 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:11,803 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,806 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,809 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,812 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,815 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:11,819 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:11,822 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:11,826 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,901 INFO L628 ElimStorePlain]: treesize reduction 83, result has 53.9 percent of original size [2021-06-05 22:13:11,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:13:11,904 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 2 variables, input treesize:710, output treesize:89 [2021-06-05 22:13:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:12,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224181223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:12,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:12,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:13:12,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496033904] [2021-06-05 22:13:12,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:12,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:12,481 INFO L87 Difference]: Start difference. First operand 739 states and 2344 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:12,826 INFO L93 Difference]: Finished difference Result 849 states and 2630 transitions. [2021-06-05 22:13:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:12,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:12,827 INFO L225 Difference]: With dead ends: 849 [2021-06-05 22:13:12,827 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 22:13:12,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:13:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 22:13:12,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 747. [2021-06-05 22:13:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.1823056300268098) internal successors, (2374), 746 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2374 transitions. [2021-06-05 22:13:12,835 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2374 transitions. Word has length 20 [2021-06-05 22:13:12,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:12,835 INFO L482 AbstractCegarLoop]: Abstraction has 747 states and 2374 transitions. [2021-06-05 22:13:12,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2374 transitions. [2021-06-05 22:13:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:12,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:12,836 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:13,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2231,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:13,036 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1380085074, now seen corresponding path program 11 times [2021-06-05 22:13:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:13,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057462683] [2021-06-05 22:13:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:13,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:13,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057462683] [2021-06-05 22:13:13,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057462683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:13,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083737007] [2021-06-05 22:13:13,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:13,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:13,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:13,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:13:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:13,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083737007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:13,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:13,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:13:13,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590712043] [2021-06-05 22:13:13,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:13:13,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:13:13,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:13:13,419 INFO L87 Difference]: Start difference. First operand 747 states and 2374 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:15,269 INFO L93 Difference]: Finished difference Result 1274 states and 3857 transitions. [2021-06-05 22:13:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:13:15,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:15,271 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 22:13:15,271 INFO L226 Difference]: Without dead ends: 1176 [2021-06-05 22:13:15,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1633.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:13:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-05 22:13:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 773. [2021-06-05 22:13:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.198186528497409) internal successors, (2469), 772 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2469 transitions. [2021-06-05 22:13:15,280 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2469 transitions. Word has length 20 [2021-06-05 22:13:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:15,280 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2469 transitions. [2021-06-05 22:13:15,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2469 transitions. [2021-06-05 22:13:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:15,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:15,281 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:15,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2378 [2021-06-05 22:13:15,482 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:15,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:15,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1333148950, now seen corresponding path program 12 times [2021-06-05 22:13:15,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:15,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715829298] [2021-06-05 22:13:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:15,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:15,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715829298] [2021-06-05 22:13:15,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715829298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:15,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980237113] [2021-06-05 22:13:15,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:15,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:13:15,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:15,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:13:15,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:15,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980237113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:15,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:15,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:13:15,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785447414] [2021-06-05 22:13:15,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:15,748 INFO L87 Difference]: Start difference. First operand 773 states and 2469 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:16,328 INFO L93 Difference]: Finished difference Result 1059 states and 3263 transitions. [2021-06-05 22:13:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:13:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:16,329 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 22:13:16,329 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 22:13:16,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 611.3ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:13:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 22:13:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 775. [2021-06-05 22:13:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.197674418604651) internal successors, (2475), 774 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2475 transitions. [2021-06-05 22:13:16,337 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2475 transitions. Word has length 20 [2021-06-05 22:13:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:16,338 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2475 transitions. [2021-06-05 22:13:16,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2475 transitions. [2021-06-05 22:13:16,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:16,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:16,339 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:16,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2391 [2021-06-05 22:13:16,539 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1784917884, now seen corresponding path program 13 times [2021-06-05 22:13:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:16,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009602085] [2021-06-05 22:13:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:16,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:16,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009602085] [2021-06-05 22:13:16,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009602085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:16,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557534011] [2021-06-05 22:13:16,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:16,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:13:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:16,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557534011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:16,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:16,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:13:16,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168749083] [2021-06-05 22:13:16,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:13:16,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:16,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:13:16,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:13:16,782 INFO L87 Difference]: Start difference. First operand 775 states and 2475 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:17,789 INFO L93 Difference]: Finished difference Result 1383 states and 4272 transitions. [2021-06-05 22:13:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:13:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:17,791 INFO L225 Difference]: With dead ends: 1383 [2021-06-05 22:13:17,791 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 22:13:17,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 808.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:13:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 22:13:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 756. [2021-06-05 22:13:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.168211920529801) internal successors, (2392), 755 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2392 transitions. [2021-06-05 22:13:17,800 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2392 transitions. Word has length 20 [2021-06-05 22:13:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:17,800 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2392 transitions. [2021-06-05 22:13:17,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2392 transitions. [2021-06-05 22:13:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:17,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:17,801 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:18,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2401 [2021-06-05 22:13:18,001 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash 116700917, now seen corresponding path program 14 times [2021-06-05 22:13:18,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:18,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084794619] [2021-06-05 22:13:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:18,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:18,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084794619] [2021-06-05 22:13:18,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084794619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:18,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686956801] [2021-06-05 22:13:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:18,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:18,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:18,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:13:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:18,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:18,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:18,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:18,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:18,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,179 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,181 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:18,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:18,191 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,194 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,197 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,199 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,202 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,205 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:18,208 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,211 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,213 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,216 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,275 INFO L628 ElimStorePlain]: treesize reduction 50, result has 62.7 percent of original size [2021-06-05 22:13:18,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:18,276 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:595, output treesize:84 [2021-06-05 22:13:18,578 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_5]} [2021-06-05 22:13:18,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:18,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:18,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:18,608 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,613 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,618 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:18,624 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,629 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,633 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,638 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,641 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,646 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:18,651 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,654 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,658 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:18,663 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,667 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:18,672 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:18,677 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,681 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,685 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,689 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,693 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,698 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,702 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,706 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,710 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,714 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,718 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,721 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,725 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,729 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,733 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,737 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,740 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,744 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,747 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,751 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,754 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,758 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,761 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,765 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,768 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,771 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,775 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,781 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,785 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,788 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,790 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,870 INFO L628 ElimStorePlain]: treesize reduction 85, result has 56.9 percent of original size [2021-06-05 22:13:18,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:18,874 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:18,877 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:18,880 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:18,882 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:18,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:18,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:18,905 INFO L247 ElimStorePlain]: Needed 56 recursive calls to eliminate 2 variables, input treesize:1912, output treesize:61 [2021-06-05 22:13:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:18,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686956801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:18,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:18,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:13:18,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778593283] [2021-06-05 22:13:18,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:18,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:18,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:18,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:18,965 INFO L87 Difference]: Start difference. First operand 756 states and 2392 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:19,878 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 22:13:20,029 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 22:13:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:20,054 INFO L93 Difference]: Finished difference Result 861 states and 2650 transitions. [2021-06-05 22:13:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:13:20,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:20,055 INFO L225 Difference]: With dead ends: 861 [2021-06-05 22:13:20,055 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 22:13:20,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1064.9ms TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:13:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 22:13:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 734. [2021-06-05 22:13:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.145975443383356) internal successors, (2306), 733 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2306 transitions. [2021-06-05 22:13:20,063 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2306 transitions. Word has length 20 [2021-06-05 22:13:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:20,063 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2306 transitions. [2021-06-05 22:13:20,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2306 transitions. [2021-06-05 22:13:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:20,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:20,064 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:20,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2417 [2021-06-05 22:13:20,264 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:20,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1556220975, now seen corresponding path program 15 times [2021-06-05 22:13:20,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:20,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47403258] [2021-06-05 22:13:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:20,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:20,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47403258] [2021-06-05 22:13:20,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47403258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:20,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255671200] [2021-06-05 22:13:20,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:20,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:13:20,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:20,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:13:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:20,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:20,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:20,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:20,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,490 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:20,497 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,499 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:20,502 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,508 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,511 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,514 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,517 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:20,520 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,522 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,525 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:20,527 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:20,588 INFO L628 ElimStorePlain]: treesize reduction 50, result has 62.7 percent of original size [2021-06-05 22:13:20,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:20,589 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:595, output treesize:84 [2021-06-05 22:13:21,053 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_5]} [2021-06-05 22:13:21,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:21,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:21,101 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,107 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,113 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,119 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:21,127 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,135 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,141 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,148 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,154 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,160 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,167 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,173 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,179 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,187 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,194 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,199 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,205 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,212 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,219 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,232 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,239 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,245 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,250 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,256 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,263 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,268 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,275 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,281 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,287 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:21,294 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,300 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,306 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,312 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,318 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,324 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,330 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,336 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,342 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,348 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,354 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,359 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,366 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,371 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,377 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,382 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,387 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,393 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,399 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,405 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,411 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,416 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,421 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,427 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,432 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,437 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,442 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,448 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,452 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,458 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,463 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,468 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,473 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,478 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,483 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:21,489 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,494 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,499 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,503 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,508 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,513 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,518 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,523 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,529 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,534 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,538 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,543 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,548 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,552 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,556 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,561 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,565 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,570 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,574 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,578 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,807 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 22:13:21,808 INFO L628 ElimStorePlain]: treesize reduction 261, result has 52.8 percent of original size [2021-06-05 22:13:21,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,811 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:21,815 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:21,819 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:21,822 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,825 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:21,828 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:21,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:21,832 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:21,835 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:21,925 INFO L628 ElimStorePlain]: treesize reduction 47, result has 72.8 percent of original size [2021-06-05 22:13:21,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:13:21,927 INFO L247 ElimStorePlain]: Needed 99 recursive calls to eliminate 2 variables, input treesize:4223, output treesize:126 [2021-06-05 22:13:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:22,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255671200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:22,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:22,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:13:22,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518238884] [2021-06-05 22:13:22,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:22,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:22,053 INFO L87 Difference]: Start difference. First operand 734 states and 2306 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:22,734 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 22:13:22,946 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 22:13:23,298 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-05 22:13:23,511 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 22:13:23,686 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-06-05 22:13:23,828 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-05 22:13:23,963 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 22:13:24,105 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-06-05 22:13:24,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:24,216 INFO L93 Difference]: Finished difference Result 992 states and 3000 transitions. [2021-06-05 22:13:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:13:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:24,218 INFO L225 Difference]: With dead ends: 992 [2021-06-05 22:13:24,218 INFO L226 Difference]: Without dead ends: 881 [2021-06-05 22:13:24,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2157.4ms TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:13:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-06-05 22:13:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 710. [2021-06-05 22:13:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.101551480959097) internal successors, (2199), 709 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2199 transitions. [2021-06-05 22:13:24,226 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2199 transitions. Word has length 20 [2021-06-05 22:13:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:24,226 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2199 transitions. [2021-06-05 22:13:24,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2199 transitions. [2021-06-05 22:13:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:24,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:24,227 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:24,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2475 [2021-06-05 22:13:24,427 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:24,428 INFO L82 PathProgramCache]: Analyzing trace with hash -239221005, now seen corresponding path program 16 times [2021-06-05 22:13:24,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:24,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068000419] [2021-06-05 22:13:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:24,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:24,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068000419] [2021-06-05 22:13:24,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068000419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:24,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977025368] [2021-06-05 22:13:24,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:24,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:24,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:13:24,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:24,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:24,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:24,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:24,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:24,733 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,738 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:24,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,743 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:24,751 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,754 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,757 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,760 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,763 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,765 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:24,769 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,772 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,774 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:24,777 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:24,836 INFO L628 ElimStorePlain]: treesize reduction 50, result has 62.7 percent of original size [2021-06-05 22:13:24,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:24,837 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:595, output treesize:84 [2021-06-05 22:13:25,512 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_5]} [2021-06-05 22:13:25,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:25,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,554 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,560 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:25,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,574 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:25,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,590 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:25,597 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,605 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,612 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,619 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:25,627 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:25,635 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,642 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,649 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,655 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,662 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,669 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,675 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:25,683 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,691 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,699 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,707 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,714 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,721 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,727 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,734 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,741 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,747 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:25,755 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,762 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,769 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,776 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,783 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,789 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,796 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,803 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,809 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,815 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,822 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:25,829 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,836 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,842 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,849 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,856 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,861 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:25,868 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,875 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,881 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,887 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,893 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:25,900 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,907 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,913 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:25,921 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,927 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,932 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,938 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,943 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,950 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:25,956 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,962 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,967 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:25,973 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,979 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,984 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:25,990 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:25,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:25,995 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,001 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,006 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,012 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,017 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,023 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,027 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,033 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:26,038 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,043 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,048 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,054 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,059 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,063 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,067 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,072 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,077 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,081 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:26,087 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,091 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,096 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,100 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,105 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,109 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,114 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,118 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,122 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,126 INFO L550 ElimStorePlain]: Start of recursive call 100: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,130 INFO L550 ElimStorePlain]: Start of recursive call 101: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,347 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 22:13:26,347 INFO L628 ElimStorePlain]: treesize reduction 266, result has 52.3 percent of original size [2021-06-05 22:13:26,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:26,353 INFO L550 ElimStorePlain]: Start of recursive call 102: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:26,357 INFO L550 ElimStorePlain]: Start of recursive call 103: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:26,361 INFO L550 ElimStorePlain]: Start of recursive call 104: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:26,365 INFO L550 ElimStorePlain]: Start of recursive call 105: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,368 INFO L550 ElimStorePlain]: Start of recursive call 106: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:26,371 INFO L550 ElimStorePlain]: Start of recursive call 107: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:26,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:26,375 INFO L550 ElimStorePlain]: Start of recursive call 108: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:26,379 INFO L550 ElimStorePlain]: Start of recursive call 109: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:26,468 INFO L628 ElimStorePlain]: treesize reduction 47, result has 72.8 percent of original size [2021-06-05 22:13:26,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:13:26,470 INFO L247 ElimStorePlain]: Needed 109 recursive calls to eliminate 2 variables, input treesize:4709, output treesize:126 [2021-06-05 22:13:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:26,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977025368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:26,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:26,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:13:26,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812779657] [2021-06-05 22:13:26,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:13:26,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:26,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:13:26,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:13:26,594 INFO L87 Difference]: Start difference. First operand 710 states and 2199 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:27,167 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-05 22:13:27,305 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 22:13:27,869 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 22:13:28,062 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 22:13:28,178 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-05 22:13:28,313 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 22:13:28,486 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 22:13:28,626 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 22:13:28,890 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 22:13:29,050 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 22:13:29,365 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 22:13:29,585 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 22:13:29,707 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-05 22:13:30,029 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-06-05 22:13:30,215 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 22:13:30,422 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 22:13:30,557 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 22:13:30,809 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-06-05 22:13:31,104 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 22:13:31,288 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-06-05 22:13:31,483 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 22:13:31,655 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-06-05 22:13:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:31,694 INFO L93 Difference]: Finished difference Result 1493 states and 4509 transitions. [2021-06-05 22:13:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:13:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:31,696 INFO L225 Difference]: With dead ends: 1493 [2021-06-05 22:13:31,696 INFO L226 Difference]: Without dead ends: 846 [2021-06-05 22:13:31,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 4920.3ms TimeCoverageRelationStatistics Valid=562, Invalid=2300, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:13:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-06-05 22:13:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 574. [2021-06-05 22:13:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.986038394415358) internal successors, (1711), 573 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1711 transitions. [2021-06-05 22:13:31,702 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1711 transitions. Word has length 20 [2021-06-05 22:13:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:31,702 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1711 transitions. [2021-06-05 22:13:31,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1711 transitions. [2021-06-05 22:13:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:31,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:31,703 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:31,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2616 [2021-06-05 22:13:31,904 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash 136518641, now seen corresponding path program 17 times [2021-06-05 22:13:31,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:31,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435789370] [2021-06-05 22:13:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:32,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435789370] [2021-06-05 22:13:32,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435789370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569630900] [2021-06-05 22:13:32,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:32,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:32,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:32,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:13:32,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:32,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:32,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:32,133 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,143 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,146 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,149 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,154 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,157 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,160 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,162 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:32,165 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,168 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:32,171 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,237 INFO L628 ElimStorePlain]: treesize reduction 56, result has 64.3 percent of original size [2021-06-05 22:13:32,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:32,238 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:614, output treesize:101 [2021-06-05 22:13:32,539 INFO L446 ElimStorePlain]: Different costs {0=[char_at_5], 1=[char_at_1]} [2021-06-05 22:13:32,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,576 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,585 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,590 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,594 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,599 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:32,604 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,610 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,615 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,619 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,624 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,629 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,634 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,639 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:32,644 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:32,649 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,654 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,659 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,664 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,669 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,673 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,677 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,681 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,686 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,689 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,693 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,697 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,702 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,706 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,710 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,721 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,725 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,729 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,733 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,737 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,740 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,744 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,748 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,751 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,771 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,774 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,778 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,782 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,785 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,789 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,792 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,795 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,798 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,801 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,804 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,807 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,892 INFO L628 ElimStorePlain]: treesize reduction 151, result has 40.8 percent of original size [2021-06-05 22:13:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:32,895 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:32,898 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:32,901 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:32,904 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:32,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:32,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:32,922 INFO L247 ElimStorePlain]: Needed 62 recursive calls to eliminate 2 variables, input treesize:2669, output treesize:51 [2021-06-05 22:13:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:32,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569630900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:32,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:32,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:13:32,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198045446] [2021-06-05 22:13:32,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:13:32,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:32,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:13:32,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:13:32,983 INFO L87 Difference]: Start difference. First operand 574 states and 1711 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:33,735 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:13:34,070 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 22:13:34,456 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 22:13:35,126 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 22:13:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:35,246 INFO L93 Difference]: Finished difference Result 877 states and 2397 transitions. [2021-06-05 22:13:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:13:35,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:35,247 INFO L225 Difference]: With dead ends: 877 [2021-06-05 22:13:35,247 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 22:13:35,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2237.8ms TimeCoverageRelationStatistics Valid=437, Invalid=1543, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:13:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 22:13:35,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 580. [2021-06-05 22:13:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.9637305699481864) internal successors, (1716), 579 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1716 transitions. [2021-06-05 22:13:35,254 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1716 transitions. Word has length 20 [2021-06-05 22:13:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:35,254 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1716 transitions. [2021-06-05 22:13:35,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1716 transitions. [2021-06-05 22:13:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:13:35,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:35,255 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:35,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2809 [2021-06-05 22:13:35,455 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -640833135, now seen corresponding path program 18 times [2021-06-05 22:13:35,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:35,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917429206] [2021-06-05 22:13:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:35,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917429206] [2021-06-05 22:13:35,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917429206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:35,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257647262] [2021-06-05 22:13:35,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:35,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:13:35,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:13:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:35,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:35,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:35,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:35,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,704 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,707 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,713 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,716 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,719 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,722 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,725 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,728 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:35,731 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,734 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,737 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,739 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,804 INFO L628 ElimStorePlain]: treesize reduction 30, result has 74.8 percent of original size [2021-06-05 22:13:35,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:35,806 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 1 variables, input treesize:695, output treesize:89 [2021-06-05 22:13:36,345 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_1]} [2021-06-05 22:13:36,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:36,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:36,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,379 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,393 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,407 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,414 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,419 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,426 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,432 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,439 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:36,446 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,451 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,457 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,462 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:36,469 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,475 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,480 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,486 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,492 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:36,498 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:36,505 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,511 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,517 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,523 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,529 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,536 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,542 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,547 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,552 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,557 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,563 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,569 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,574 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,580 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,586 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,591 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,596 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,602 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,608 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,614 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:36,621 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,628 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,634 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:36,641 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,647 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,653 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,659 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,663 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,668 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,673 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,678 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,683 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,687 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:36,693 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,698 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,703 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,707 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,712 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,717 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,722 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,727 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,732 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,736 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,740 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,745 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,750 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,754 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,758 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,762 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,767 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,771 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,775 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,779 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,784 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,788 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,792 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:36,797 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,801 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,805 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,808 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,812 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,816 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,819 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,984 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 22:13:36,984 INFO L628 ElimStorePlain]: treesize reduction 257, result has 42.4 percent of original size [2021-06-05 22:13:36,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:36,989 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:36,992 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:36,996 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:36,999 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:37,004 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:37,007 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,073 INFO L628 ElimStorePlain]: treesize reduction 19, result has 82.4 percent of original size [2021-06-05 22:13:37,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:13:37,074 INFO L247 ElimStorePlain]: Needed 94 recursive calls to eliminate 2 variables, input treesize:4310, output treesize:89 [2021-06-05 22:13:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:37,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257647262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:37,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:37,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:13:37,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102729941] [2021-06-05 22:13:37,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:13:37,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:37,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:13:37,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:13:37,186 INFO L87 Difference]: Start difference. First operand 580 states and 1716 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:37,494 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 22:13:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:38,487 INFO L93 Difference]: Finished difference Result 764 states and 2167 transitions. [2021-06-05 22:13:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:13:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:13:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:38,488 INFO L225 Difference]: With dead ends: 764 [2021-06-05 22:13:38,488 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 22:13:38,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1368.3ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:13:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 22:13:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 599. [2021-06-05 22:13:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.9665551839464883) internal successors, (1774), 598 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1774 transitions. [2021-06-05 22:13:38,494 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1774 transitions. Word has length 20 [2021-06-05 22:13:38,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:38,494 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1774 transitions. [2021-06-05 22:13:38,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:38,494 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1774 transitions. [2021-06-05 22:13:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:38,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:38,495 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:38,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2899,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:38,697 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1834020867, now seen corresponding path program 14 times [2021-06-05 22:13:38,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:38,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927254504] [2021-06-05 22:13:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:38,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:38,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927254504] [2021-06-05 22:13:38,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927254504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:38,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501365825] [2021-06-05 22:13:38,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:38,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:38,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:38,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501365825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:38,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:38,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 22:13:38,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599079334] [2021-06-05 22:13:38,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:38,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:38,889 INFO L87 Difference]: Start difference. First operand 599 states and 1774 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:39,966 INFO L93 Difference]: Finished difference Result 1146 states and 3326 transitions. [2021-06-05 22:13:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:13:39,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:39,967 INFO L225 Difference]: With dead ends: 1146 [2021-06-05 22:13:39,967 INFO L226 Difference]: Without dead ends: 964 [2021-06-05 22:13:39,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=449, Invalid=1807, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:13:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-06-05 22:13:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 601. [2021-06-05 22:13:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.993333333333333) internal successors, (1796), 600 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1796 transitions. [2021-06-05 22:13:39,974 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1796 transitions. Word has length 21 [2021-06-05 22:13:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:39,974 INFO L482 AbstractCegarLoop]: Abstraction has 601 states and 1796 transitions. [2021-06-05 22:13:39,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1796 transitions. [2021-06-05 22:13:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:39,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:39,975 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:40,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3003,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:40,176 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash 272596531, now seen corresponding path program 15 times [2021-06-05 22:13:40,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:40,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121240283] [2021-06-05 22:13:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:40,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:40,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121240283] [2021-06-05 22:13:40,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121240283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:40,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052588830] [2021-06-05 22:13:40,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:40,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:13:40,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:40,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:40,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:40,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:40,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:40,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:40,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:40,308 INFO L628 ElimStorePlain]: treesize reduction 32, result has 48.4 percent of original size [2021-06-05 22:13:40,309 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:13:40,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:40,309 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:30 [2021-06-05 22:13:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:40,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052588830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:40,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:40,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:13:40,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616423807] [2021-06-05 22:13:40,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:13:40,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:40,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:13:40,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:40,505 INFO L87 Difference]: Start difference. First operand 601 states and 1796 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:40,606 INFO L93 Difference]: Finished difference Result 739 states and 2199 transitions. [2021-06-05 22:13:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:13:40,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:40,607 INFO L225 Difference]: With dead ends: 739 [2021-06-05 22:13:40,607 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 22:13:40,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 22:13:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 621. [2021-06-05 22:13:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 3.011290322580645) internal successors, (1867), 620 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1867 transitions. [2021-06-05 22:13:40,613 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1867 transitions. Word has length 21 [2021-06-05 22:13:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:40,613 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1867 transitions. [2021-06-05 22:13:40,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1867 transitions. [2021-06-05 22:13:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:40,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:40,614 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:40,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:40,815 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:40,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:40,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1249318769, now seen corresponding path program 16 times [2021-06-05 22:13:40,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:40,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403613240] [2021-06-05 22:13:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:40,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:40,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403613240] [2021-06-05 22:13:40,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403613240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:40,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927739480] [2021-06-05 22:13:40,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:40,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:40,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:40,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:40,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:40,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:40,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:40,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:40,962 INFO L628 ElimStorePlain]: treesize reduction 32, result has 48.4 percent of original size [2021-06-05 22:13:40,962 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:13:40,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:40,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:30 [2021-06-05 22:13:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:41,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927739480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:41,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:41,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:13:41,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568327436] [2021-06-05 22:13:41,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:41,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:41,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:41,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:41,136 INFO L87 Difference]: Start difference. First operand 621 states and 1867 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:41,640 INFO L93 Difference]: Finished difference Result 1007 states and 2926 transitions. [2021-06-05 22:13:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:13:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:41,642 INFO L225 Difference]: With dead ends: 1007 [2021-06-05 22:13:41,642 INFO L226 Difference]: Without dead ends: 911 [2021-06-05 22:13:41,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 491.1ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:13:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-06-05 22:13:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 645. [2021-06-05 22:13:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.029503105590062) internal successors, (1951), 644 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1951 transitions. [2021-06-05 22:13:41,649 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1951 transitions. Word has length 21 [2021-06-05 22:13:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:41,649 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 1951 transitions. [2021-06-05 22:13:41,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1951 transitions. [2021-06-05 22:13:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:41,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:41,650 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:41,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:41,850 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1446979055, now seen corresponding path program 17 times [2021-06-05 22:13:41,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:41,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186546799] [2021-06-05 22:13:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:41,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:41,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186546799] [2021-06-05 22:13:41,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186546799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:41,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047279596] [2021-06-05 22:13:41,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:41,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:13:41,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:42,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047279596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:42,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:42,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:13:42,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758657899] [2021-06-05 22:13:42,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:42,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:42,054 INFO L87 Difference]: Start difference. First operand 645 states and 1951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:42,200 INFO L93 Difference]: Finished difference Result 762 states and 2267 transitions. [2021-06-05 22:13:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:13:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:42,201 INFO L225 Difference]: With dead ends: 762 [2021-06-05 22:13:42,202 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 22:13:42,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 22:13:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 621. [2021-06-05 22:13:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 3.0129032258064514) internal successors, (1868), 620 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1868 transitions. [2021-06-05 22:13:42,208 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1868 transitions. Word has length 21 [2021-06-05 22:13:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:42,208 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1868 transitions. [2021-06-05 22:13:42,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1868 transitions. [2021-06-05 22:13:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:42,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:42,208 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:42,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:42,409 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:42,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1577466005, now seen corresponding path program 18 times [2021-06-05 22:13:42,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:42,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598500935] [2021-06-05 22:13:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:42,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:42,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598500935] [2021-06-05 22:13:42,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598500935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:42,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678142329] [2021-06-05 22:13:42,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:42,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:13:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:42,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:42,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:42,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:42,536 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:42,539 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:42,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:42,546 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,549 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,557 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:42,561 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,565 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,568 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,579 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,582 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:42,585 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,588 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,591 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,594 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,597 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,599 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:42,602 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,605 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,659 INFO L628 ElimStorePlain]: treesize reduction 61, result has 54.5 percent of original size [2021-06-05 22:13:42,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:42,660 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 1 variables, input treesize:628, output treesize:73 [2021-06-05 22:13:42,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:42,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,723 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 22:13:42,723 INFO L518 ElimStorePlain]: Eliminatee v_prenex_14 vanished before elimination [2021-06-05 22:13:42,723 INFO L518 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2021-06-05 22:13:42,723 INFO L518 ElimStorePlain]: Eliminatee index_of_8 vanished before elimination [2021-06-05 22:13:42,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:42,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:29 [2021-06-05 22:13:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:42,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678142329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:42,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:42,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:13:42,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253613329] [2021-06-05 22:13:42,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:13:42,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:42,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:13:42,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:42,772 INFO L87 Difference]: Start difference. First operand 621 states and 1868 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:42,950 INFO L93 Difference]: Finished difference Result 701 states and 2082 transitions. [2021-06-05 22:13:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:42,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:42,951 INFO L225 Difference]: With dead ends: 701 [2021-06-05 22:13:42,951 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 22:13:42,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 22:13:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 629. [2021-06-05 22:13:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.0127388535031847) internal successors, (1892), 628 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1892 transitions. [2021-06-05 22:13:42,957 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1892 transitions. Word has length 21 [2021-06-05 22:13:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:42,957 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1892 transitions. [2021-06-05 22:13:42,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1892 transitions. [2021-06-05 22:13:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:42,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:42,958 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:43,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3095,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:43,161 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2001092945, now seen corresponding path program 19 times [2021-06-05 22:13:43,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:43,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800657237] [2021-06-05 22:13:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:43,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:43,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800657237] [2021-06-05 22:13:43,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800657237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951571542] [2021-06-05 22:13:43,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:43,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:43,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:43,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:43,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:43,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:43,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:43,299 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:43,302 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:43,305 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:43,308 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:43,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:43,313 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:43,316 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:43,318 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:43,321 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:43,370 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.0 percent of original size [2021-06-05 22:13:43,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:43,371 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:381, output treesize:73 [2021-06-05 22:13:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:43,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951571542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:43,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:43,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:13:43,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147171383] [2021-06-05 22:13:43,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:13:43,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:43,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:13:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:43,481 INFO L87 Difference]: Start difference. First operand 629 states and 1892 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:43,673 INFO L93 Difference]: Finished difference Result 821 states and 2442 transitions. [2021-06-05 22:13:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:43,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:43,674 INFO L225 Difference]: With dead ends: 821 [2021-06-05 22:13:43,674 INFO L226 Difference]: Without dead ends: 768 [2021-06-05 22:13:43,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-05 22:13:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 653. [2021-06-05 22:13:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.0306748466257667) internal successors, (1976), 652 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1976 transitions. [2021-06-05 22:13:43,680 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1976 transitions. Word has length 21 [2021-06-05 22:13:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:43,680 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1976 transitions. [2021-06-05 22:13:43,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1976 transitions. [2021-06-05 22:13:43,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:43,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:43,681 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:43,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3103,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:43,883 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash -695204879, now seen corresponding path program 20 times [2021-06-05 22:13:43,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:43,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283595411] [2021-06-05 22:13:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:43,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:43,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283595411] [2021-06-05 22:13:43,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283595411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:43,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471209242] [2021-06-05 22:13:43,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:43,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:43,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:44,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:44,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:44,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:44,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:44,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:44,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:44,050 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,053 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,056 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,059 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,062 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,065 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,068 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:44,071 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,074 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,077 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,080 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,083 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,086 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,088 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,091 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,094 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:44,098 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,100 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:44,103 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,106 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:44,109 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,112 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,115 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,117 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:44,120 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:44,173 INFO L628 ElimStorePlain]: treesize reduction 65, result has 52.9 percent of original size [2021-06-05 22:13:44,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:44,174 INFO L247 ElimStorePlain]: Needed 32 recursive calls to eliminate 1 variables, input treesize:903, output treesize:73 [2021-06-05 22:13:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:44,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471209242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:44,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:44,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:13:44,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334578160] [2021-06-05 22:13:44,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:44,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:44,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:44,293 INFO L87 Difference]: Start difference. First operand 653 states and 1976 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:44,774 INFO L93 Difference]: Finished difference Result 921 states and 2705 transitions. [2021-06-05 22:13:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:13:44,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:44,776 INFO L225 Difference]: With dead ends: 921 [2021-06-05 22:13:44,776 INFO L226 Difference]: Without dead ends: 802 [2021-06-05 22:13:44,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:13:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-05 22:13:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 620. [2021-06-05 22:13:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.012924071082391) internal successors, (1865), 619 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1865 transitions. [2021-06-05 22:13:44,782 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1865 transitions. Word has length 21 [2021-06-05 22:13:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:44,782 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1865 transitions. [2021-06-05 22:13:44,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1865 transitions. [2021-06-05 22:13:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:44,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:44,783 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:44,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3115,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:44,983 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1469943673, now seen corresponding path program 21 times [2021-06-05 22:13:44,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:44,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775659463] [2021-06-05 22:13:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:45,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:45,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775659463] [2021-06-05 22:13:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775659463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:45,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820356828] [2021-06-05 22:13:45,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:45,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:13:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:45,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820356828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:45,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:45,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:13:45,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433571720] [2021-06-05 22:13:45,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:13:45,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:45,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:13:45,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:45,156 INFO L87 Difference]: Start difference. First operand 620 states and 1865 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:45,306 INFO L93 Difference]: Finished difference Result 813 states and 2411 transitions. [2021-06-05 22:13:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:13:45,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:45,308 INFO L225 Difference]: With dead ends: 813 [2021-06-05 22:13:45,308 INFO L226 Difference]: Without dead ends: 770 [2021-06-05 22:13:45,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:45,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-06-05 22:13:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 634. [2021-06-05 22:13:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 3.0315955766192735) internal successors, (1919), 633 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1919 transitions. [2021-06-05 22:13:45,314 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1919 transitions. Word has length 21 [2021-06-05 22:13:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:45,314 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1919 transitions. [2021-06-05 22:13:45,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1919 transitions. [2021-06-05 22:13:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:45,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:45,315 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:45,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3125 [2021-06-05 22:13:45,531 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1848301385, now seen corresponding path program 22 times [2021-06-05 22:13:45,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:45,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813339973] [2021-06-05 22:13:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:45,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:45,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813339973] [2021-06-05 22:13:45,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813339973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:45,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346550144] [2021-06-05 22:13:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:45,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:45,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:45,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:45,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346550144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:45,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:45,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:13:45,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848793470] [2021-06-05 22:13:45,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:13:45,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:13:45,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:45,702 INFO L87 Difference]: Start difference. First operand 634 states and 1919 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:45,981 INFO L93 Difference]: Finished difference Result 883 states and 2599 transitions. [2021-06-05 22:13:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:13:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:45,982 INFO L225 Difference]: With dead ends: 883 [2021-06-05 22:13:45,982 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 22:13:45,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 22:13:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 658. [2021-06-05 22:13:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.0487062404870624) internal successors, (2003), 657 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2003 transitions. [2021-06-05 22:13:45,989 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2003 transitions. Word has length 21 [2021-06-05 22:13:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:45,989 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 2003 transitions. [2021-06-05 22:13:45,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2003 transitions. [2021-06-05 22:13:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:45,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:45,990 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:46,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3131,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:46,191 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:46,191 INFO L82 PathProgramCache]: Analyzing trace with hash -249631913, now seen corresponding path program 23 times [2021-06-05 22:13:46,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:46,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797563651] [2021-06-05 22:13:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:46,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:46,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797563651] [2021-06-05 22:13:46,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797563651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:46,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137423031] [2021-06-05 22:13:46,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:46,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:13:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:46,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137423031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:46,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:46,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:13:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015493782] [2021-06-05 22:13:46,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:13:46,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:13:46,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:46,380 INFO L87 Difference]: Start difference. First operand 658 states and 2003 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:46,569 INFO L93 Difference]: Finished difference Result 902 states and 2658 transitions. [2021-06-05 22:13:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:13:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:46,570 INFO L225 Difference]: With dead ends: 902 [2021-06-05 22:13:46,570 INFO L226 Difference]: Without dead ends: 859 [2021-06-05 22:13:46,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-06-05 22:13:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 640. [2021-06-05 22:13:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.028169014084507) internal successors, (1935), 639 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1935 transitions. [2021-06-05 22:13:46,577 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1935 transitions. Word has length 21 [2021-06-05 22:13:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:46,577 INFO L482 AbstractCegarLoop]: Abstraction has 640 states and 1935 transitions. [2021-06-05 22:13:46,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1935 transitions. [2021-06-05 22:13:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:46,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:46,578 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:46,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3141 [2021-06-05 22:13:46,781 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:46,781 INFO L82 PathProgramCache]: Analyzing trace with hash 98753771, now seen corresponding path program 24 times [2021-06-05 22:13:46,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:46,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573587571] [2021-06-05 22:13:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:46,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:46,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573587571] [2021-06-05 22:13:46,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573587571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:46,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612592427] [2021-06-05 22:13:46,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:46,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:13:46,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:46,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612592427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:46,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:46,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:13:46,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649837639] [2021-06-05 22:13:46,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:13:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:13:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:13:46,981 INFO L87 Difference]: Start difference. First operand 640 states and 1935 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:47,139 INFO L93 Difference]: Finished difference Result 868 states and 2550 transitions. [2021-06-05 22:13:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:13:47,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:47,140 INFO L225 Difference]: With dead ends: 868 [2021-06-05 22:13:47,140 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 22:13:47,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 22:13:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 587. [2021-06-05 22:13:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.0187713310580206) internal successors, (1769), 586 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1769 transitions. [2021-06-05 22:13:47,147 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1769 transitions. Word has length 21 [2021-06-05 22:13:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:47,147 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1769 transitions. [2021-06-05 22:13:47,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1769 transitions. [2021-06-05 22:13:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:47,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:47,148 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:47,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:47,348 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1173073939, now seen corresponding path program 25 times [2021-06-05 22:13:47,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:47,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610248732] [2021-06-05 22:13:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:47,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:47,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610248732] [2021-06-05 22:13:47,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610248732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:47,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640774401] [2021-06-05 22:13:47,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:47,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:47,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:47,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:47,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,482 INFO L628 ElimStorePlain]: treesize reduction 32, result has 48.4 percent of original size [2021-06-05 22:13:47,482 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-06-05 22:13:47,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:47,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:30 [2021-06-05 22:13:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:47,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640774401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:47,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:47,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:13:47,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831455227] [2021-06-05 22:13:47,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:13:47,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:47,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:13:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:13:47,539 INFO L87 Difference]: Start difference. First operand 587 states and 1769 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:47,612 INFO L93 Difference]: Finished difference Result 697 states and 2086 transitions. [2021-06-05 22:13:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:47,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:47,613 INFO L225 Difference]: With dead ends: 697 [2021-06-05 22:13:47,613 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 22:13:47,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 22:13:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 593. [2021-06-05 22:13:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.018581081081081) internal successors, (1787), 592 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1787 transitions. [2021-06-05 22:13:47,619 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1787 transitions. Word has length 21 [2021-06-05 22:13:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:47,619 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1787 transitions. [2021-06-05 22:13:47,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1787 transitions. [2021-06-05 22:13:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:47,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:47,620 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:47,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-06-05 22:13:47,821 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2145171119, now seen corresponding path program 26 times [2021-06-05 22:13:47,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:47,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617972198] [2021-06-05 22:13:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:47,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:47,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617972198] [2021-06-05 22:13:47,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617972198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:47,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490346442] [2021-06-05 22:13:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:47,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:47,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:47,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:47,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:47,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:47,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,956 INFO L628 ElimStorePlain]: treesize reduction 32, result has 48.4 percent of original size [2021-06-05 22:13:47,956 INFO L518 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2021-06-05 22:13:47,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:47,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:30 [2021-06-05 22:13:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:48,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490346442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:48,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:48,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:13:48,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369083503] [2021-06-05 22:13:48,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:13:48,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:48,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:13:48,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:13:48,034 INFO L87 Difference]: Start difference. First operand 593 states and 1787 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:48,141 INFO L93 Difference]: Finished difference Result 774 states and 2299 transitions. [2021-06-05 22:13:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:48,142 INFO L225 Difference]: With dead ends: 774 [2021-06-05 22:13:48,143 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 22:13:48,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:13:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 22:13:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 616. [2021-06-05 22:13:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.0341463414634147) internal successors, (1866), 615 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1866 transitions. [2021-06-05 22:13:48,149 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1866 transitions. Word has length 21 [2021-06-05 22:13:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:48,149 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 1866 transitions. [2021-06-05 22:13:48,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1866 transitions. [2021-06-05 22:13:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:48,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:48,150 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:48,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3161 [2021-06-05 22:13:48,351 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:48,351 INFO L82 PathProgramCache]: Analyzing trace with hash -546501647, now seen corresponding path program 27 times [2021-06-05 22:13:48,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:48,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877946798] [2021-06-05 22:13:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:48,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:48,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877946798] [2021-06-05 22:13:48,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877946798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:48,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452855106] [2021-06-05 22:13:48,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:48,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:13:48,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:48,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:48,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452855106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:48,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:48,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 22:13:48,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886659300] [2021-06-05 22:13:48,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:13:48,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:48,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:13:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:13:48,834 INFO L87 Difference]: Start difference. First operand 616 states and 1866 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:49,650 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-06-05 22:13:50,112 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 22:13:50,309 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 22:13:50,443 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 22:13:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:50,809 INFO L93 Difference]: Finished difference Result 1044 states and 3029 transitions. [2021-06-05 22:13:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:13:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:50,811 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 22:13:50,811 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 22:13:50,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1945.6ms TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:13:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 22:13:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 583. [2021-06-05 22:13:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.0034364261168385) internal successors, (1748), 582 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1748 transitions. [2021-06-05 22:13:50,817 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1748 transitions. Word has length 21 [2021-06-05 22:13:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:50,817 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1748 transitions. [2021-06-05 22:13:50,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1748 transitions. [2021-06-05 22:13:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:50,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:50,818 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:51,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-06-05 22:13:51,019 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:51,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:51,019 INFO L82 PathProgramCache]: Analyzing trace with hash -676988597, now seen corresponding path program 28 times [2021-06-05 22:13:51,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:51,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829714052] [2021-06-05 22:13:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:51,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:51,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829714052] [2021-06-05 22:13:51,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829714052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:51,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905248134] [2021-06-05 22:13:51,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:51,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:51,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:51,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:51,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:51,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:51,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:51,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:51,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:51,161 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:51,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,168 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,173 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,176 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,179 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,181 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:51,185 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,187 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,190 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,192 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,195 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,198 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,201 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,203 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,206 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:51,209 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,212 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:51,215 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,217 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:51,220 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,223 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,225 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,228 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,230 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,282 INFO L628 ElimStorePlain]: treesize reduction 65, result has 52.9 percent of original size [2021-06-05 22:13:51,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:51,283 INFO L247 ElimStorePlain]: Needed 32 recursive calls to eliminate 1 variables, input treesize:903, output treesize:73 [2021-06-05 22:13:51,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:51,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:51,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:51,339 INFO L518 ElimStorePlain]: Eliminatee index_of_8 vanished before elimination [2021-06-05 22:13:51,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:51,340 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:29 [2021-06-05 22:13:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:51,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905248134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:51,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:51,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:13:51,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712407682] [2021-06-05 22:13:51,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:13:51,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:51,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:13:51,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:51,389 INFO L87 Difference]: Start difference. First operand 583 states and 1748 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:51,605 INFO L93 Difference]: Finished difference Result 643 states and 1899 transitions. [2021-06-05 22:13:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:51,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:51,606 INFO L225 Difference]: With dead ends: 643 [2021-06-05 22:13:51,606 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 22:13:51,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 22:13:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-06-05 22:13:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.989637305699482) internal successors, (1731), 579 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1731 transitions. [2021-06-05 22:13:51,617 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1731 transitions. Word has length 21 [2021-06-05 22:13:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:51,617 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1731 transitions. [2021-06-05 22:13:51,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1731 transitions. [2021-06-05 22:13:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:51,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:51,618 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:51,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 22:13:51,819 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:51,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1393396943, now seen corresponding path program 29 times [2021-06-05 22:13:51,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:51,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866625035] [2021-06-05 22:13:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:51,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:51,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866625035] [2021-06-05 22:13:51,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866625035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:51,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783740853] [2021-06-05 22:13:51,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:51,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:51,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:52,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783740853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:52,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:52,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:13:52,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101996412] [2021-06-05 22:13:52,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:13:52,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:52,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:13:52,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:13:52,059 INFO L87 Difference]: Start difference. First operand 580 states and 1731 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:52,342 INFO L93 Difference]: Finished difference Result 792 states and 2321 transitions. [2021-06-05 22:13:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:13:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:52,343 INFO L225 Difference]: With dead ends: 792 [2021-06-05 22:13:52,343 INFO L226 Difference]: Without dead ends: 741 [2021-06-05 22:13:52,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:13:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-05 22:13:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 600. [2021-06-05 22:13:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.0) internal successors, (1797), 599 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1797 transitions. [2021-06-05 22:13:52,349 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1797 transitions. Word has length 21 [2021-06-05 22:13:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:52,349 INFO L482 AbstractCegarLoop]: Abstraction has 600 states and 1797 transitions. [2021-06-05 22:13:52,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1797 transitions. [2021-06-05 22:13:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:52,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:52,350 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:52,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3194 [2021-06-05 22:13:52,550 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash 205272529, now seen corresponding path program 30 times [2021-06-05 22:13:52,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:52,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036178138] [2021-06-05 22:13:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:52,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:52,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036178138] [2021-06-05 22:13:52,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036178138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:52,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939207871] [2021-06-05 22:13:52,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:52,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:13:52,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:52,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:52,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:52,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:13:52,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:52,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:52,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:13:52,699 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:52,702 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:52,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:52,707 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:52,710 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:13:52,715 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:52,718 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:52,720 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:52,723 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:52,773 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.0 percent of original size [2021-06-05 22:13:52,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:52,774 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:381, output treesize:73 [2021-06-05 22:13:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:52,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939207871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:52,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:52,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:13:52,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538766082] [2021-06-05 22:13:52,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:13:52,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:52,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:13:52,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:13:52,879 INFO L87 Difference]: Start difference. First operand 600 states and 1797 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:53,071 INFO L93 Difference]: Finished difference Result 739 states and 2163 transitions. [2021-06-05 22:13:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:53,072 INFO L225 Difference]: With dead ends: 739 [2021-06-05 22:13:53,072 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 22:13:53,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 22:13:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 580. [2021-06-05 22:13:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.98272884283247) internal successors, (1727), 579 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1727 transitions. [2021-06-05 22:13:53,078 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1727 transitions. Word has length 21 [2021-06-05 22:13:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:53,078 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1727 transitions. [2021-06-05 22:13:53,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1727 transitions. [2021-06-05 22:13:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:53,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:53,079 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:53,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3205,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:53,293 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:53,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:53,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1596328119, now seen corresponding path program 31 times [2021-06-05 22:13:53,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:53,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690208079] [2021-06-05 22:13:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:53,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:53,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690208079] [2021-06-05 22:13:53,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690208079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:53,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438676702] [2021-06-05 22:13:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:53,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438676702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:53,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:53,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:13:53,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788759769] [2021-06-05 22:13:53,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:53,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:53,515 INFO L87 Difference]: Start difference. First operand 580 states and 1727 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:53,827 INFO L93 Difference]: Finished difference Result 838 states and 2438 transitions. [2021-06-05 22:13:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:53,829 INFO L225 Difference]: With dead ends: 838 [2021-06-05 22:13:53,829 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 22:13:53,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 22:13:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 604. [2021-06-05 22:13:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.9718076285240462) internal successors, (1792), 603 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1792 transitions. [2021-06-05 22:13:53,835 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1792 transitions. Word has length 21 [2021-06-05 22:13:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:53,835 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1792 transitions. [2021-06-05 22:13:53,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1792 transitions. [2021-06-05 22:13:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:53,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:53,836 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:54,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3216,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:54,038 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:54,038 INFO L82 PathProgramCache]: Analyzing trace with hash -114282799, now seen corresponding path program 32 times [2021-06-05 22:13:54,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:54,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472887277] [2021-06-05 22:13:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:54,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:54,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472887277] [2021-06-05 22:13:54,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472887277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:54,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461489210] [2021-06-05 22:13:54,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:54,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:54,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:54,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461489210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:54,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:54,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:13:54,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623408087] [2021-06-05 22:13:54,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:54,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:54,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:54,277 INFO L87 Difference]: Start difference. First operand 604 states and 1792 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:54,577 INFO L93 Difference]: Finished difference Result 835 states and 2426 transitions. [2021-06-05 22:13:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:54,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:54,578 INFO L225 Difference]: With dead ends: 835 [2021-06-05 22:13:54,578 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 22:13:54,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 22:13:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 613. [2021-06-05 22:13:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.9836601307189543) internal successors, (1826), 612 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1826 transitions. [2021-06-05 22:13:54,585 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1826 transitions. Word has length 21 [2021-06-05 22:13:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:54,585 INFO L482 AbstractCegarLoop]: Abstraction has 613 states and 1826 transitions. [2021-06-05 22:13:54,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1826 transitions. [2021-06-05 22:13:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:54,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:54,586 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:54,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3222,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:54,787 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:54,787 INFO L82 PathProgramCache]: Analyzing trace with hash -830691145, now seen corresponding path program 33 times [2021-06-05 22:13:54,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:54,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587845095] [2021-06-05 22:13:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:54,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:54,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587845095] [2021-06-05 22:13:54,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587845095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:54,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974292036] [2021-06-05 22:13:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:54,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:13:54,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:54,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:55,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974292036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:55,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:55,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:13:55,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025739187] [2021-06-05 22:13:55,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:55,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:55,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:55,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:55,048 INFO L87 Difference]: Start difference. First operand 613 states and 1826 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:55,637 INFO L93 Difference]: Finished difference Result 922 states and 2641 transitions. [2021-06-05 22:13:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:13:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:55,639 INFO L225 Difference]: With dead ends: 922 [2021-06-05 22:13:55,639 INFO L226 Difference]: Without dead ends: 873 [2021-06-05 22:13:55,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:13:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-05 22:13:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 626. [2021-06-05 22:13:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.0096) internal successors, (1881), 625 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1881 transitions. [2021-06-05 22:13:55,646 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1881 transitions. Word has length 21 [2021-06-05 22:13:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:55,646 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1881 transitions. [2021-06-05 22:13:55,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1881 transitions. [2021-06-05 22:13:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:55,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:55,647 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:55,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-06-05 22:13:55,847 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash 767978327, now seen corresponding path program 34 times [2021-06-05 22:13:55,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:55,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875359023] [2021-06-05 22:13:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:55,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:55,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875359023] [2021-06-05 22:13:55,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875359023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:55,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314524829] [2021-06-05 22:13:55,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:55,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:56,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314524829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:56,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:56,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:13:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681189121] [2021-06-05 22:13:56,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:13:56,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:56,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:13:56,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:13:56,093 INFO L87 Difference]: Start difference. First operand 626 states and 1881 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:56,430 INFO L93 Difference]: Finished difference Result 818 states and 2379 transitions. [2021-06-05 22:13:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:56,431 INFO L225 Difference]: With dead ends: 818 [2021-06-05 22:13:56,431 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 22:13:56,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 22:13:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 610. [2021-06-05 22:13:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 2.9835796387520523) internal successors, (1817), 609 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1817 transitions. [2021-06-05 22:13:56,437 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1817 transitions. Word has length 21 [2021-06-05 22:13:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:56,437 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1817 transitions. [2021-06-05 22:13:56,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1817 transitions. [2021-06-05 22:13:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:56,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:56,438 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:56,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3237,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:56,638 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:56,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1056726783, now seen corresponding path program 35 times [2021-06-05 22:13:56,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:56,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636435115] [2021-06-05 22:13:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:56,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:56,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636435115] [2021-06-05 22:13:56,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636435115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:56,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710889164] [2021-06-05 22:13:56,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:56,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:13:56,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:56,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:56,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:56,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710889164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:56,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:56,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:13:56,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178689931] [2021-06-05 22:13:56,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:56,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:56,872 INFO L87 Difference]: Start difference. First operand 610 states and 1817 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:58,704 INFO L93 Difference]: Finished difference Result 1158 states and 3358 transitions. [2021-06-05 22:13:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:13:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:13:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:58,705 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 22:13:58,705 INFO L226 Difference]: Without dead ends: 957 [2021-06-05 22:13:58,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1545.1ms TimeCoverageRelationStatistics Valid=504, Invalid=2148, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:13:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-06-05 22:13:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 624. [2021-06-05 22:13:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.998394863563403) internal successors, (1868), 623 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1868 transitions. [2021-06-05 22:13:58,712 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1868 transitions. Word has length 21 [2021-06-05 22:13:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:58,712 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1868 transitions. [2021-06-05 22:13:58,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1868 transitions. [2021-06-05 22:13:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:13:58,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:58,713 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:58,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3243 [2021-06-05 22:13:58,914 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:58,914 INFO L82 PathProgramCache]: Analyzing trace with hash -356572755, now seen corresponding path program 36 times [2021-06-05 22:13:58,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:58,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622519432] [2021-06-05 22:13:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:58,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:58,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622519432] [2021-06-05 22:13:58,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622519432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:58,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73332685] [2021-06-05 22:13:58,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:59,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:13:59,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:59,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:13:59,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:59,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73332685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:59,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:59,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:13:59,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462194696] [2021-06-05 22:13:59,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:13:59,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:13:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:13:59,133 INFO L87 Difference]: Start difference. First operand 624 states and 1868 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:00,623 INFO L93 Difference]: Finished difference Result 1268 states and 3580 transitions. [2021-06-05 22:14:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:14:00,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:00,625 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 22:14:00,625 INFO L226 Difference]: Without dead ends: 1052 [2021-06-05 22:14:00,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1223.6ms TimeCoverageRelationStatistics Valid=486, Invalid=2064, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:14:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-05 22:14:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 660. [2021-06-05 22:14:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.0136570561456755) internal successors, (1986), 659 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1986 transitions. [2021-06-05 22:14:00,633 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1986 transitions. Word has length 21 [2021-06-05 22:14:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:00,633 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1986 transitions. [2021-06-05 22:14:00,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1986 transitions. [2021-06-05 22:14:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:14:00,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:00,634 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:00,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3249,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:00,836 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:00,836 INFO L82 PathProgramCache]: Analyzing trace with hash -927722751, now seen corresponding path program 37 times [2021-06-05 22:14:00,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:00,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616146426] [2021-06-05 22:14:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:00,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:00,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616146426] [2021-06-05 22:14:00,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616146426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:00,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829104930] [2021-06-05 22:14:00,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:00,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:01,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829104930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:01,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:01,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:14:01,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745607697] [2021-06-05 22:14:01,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:14:01,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:01,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:14:01,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:01,059 INFO L87 Difference]: Start difference. First operand 660 states and 1986 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:01,808 INFO L93 Difference]: Finished difference Result 1027 states and 2974 transitions. [2021-06-05 22:14:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:14:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:01,810 INFO L225 Difference]: With dead ends: 1027 [2021-06-05 22:14:01,810 INFO L226 Difference]: Without dead ends: 842 [2021-06-05 22:14:01,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:14:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-05 22:14:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 651. [2021-06-05 22:14:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.0107692307692306) internal successors, (1957), 650 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1957 transitions. [2021-06-05 22:14:01,819 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1957 transitions. Word has length 21 [2021-06-05 22:14:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:01,819 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 1957 transitions. [2021-06-05 22:14:01,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1957 transitions. [2021-06-05 22:14:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:14:01,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:01,820 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:02,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:02,020 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash -472818675, now seen corresponding path program 38 times [2021-06-05 22:14:02,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:02,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633831591] [2021-06-05 22:14:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:02,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:02,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633831591] [2021-06-05 22:14:02,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633831591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:02,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629966000] [2021-06-05 22:14:02,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:02,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:02,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:02,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:02,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:02,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629966000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:02,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:02,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:14:02,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761959795] [2021-06-05 22:14:02,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:02,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:02,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:02,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:02,203 INFO L87 Difference]: Start difference. First operand 651 states and 1957 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:02,373 INFO L93 Difference]: Finished difference Result 816 states and 2381 transitions. [2021-06-05 22:14:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:14:02,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:02,374 INFO L225 Difference]: With dead ends: 816 [2021-06-05 22:14:02,374 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 22:14:02,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 22:14:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 593. [2021-06-05 22:14:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.9695945945945947) internal successors, (1758), 592 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1758 transitions. [2021-06-05 22:14:02,380 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1758 transitions. Word has length 21 [2021-06-05 22:14:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:02,380 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1758 transitions. [2021-06-05 22:14:02,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1758 transitions. [2021-06-05 22:14:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:14:02,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:02,381 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:02,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3264,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:02,593 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash -568319523, now seen corresponding path program 39 times [2021-06-05 22:14:02,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:02,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95804578] [2021-06-05 22:14:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:02,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:02,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95804578] [2021-06-05 22:14:02,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95804578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:02,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600743572] [2021-06-05 22:14:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:02,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:14:02,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:02,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:02,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600743572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:02,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:02,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-06-05 22:14:02,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219904243] [2021-06-05 22:14:02,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:14:02,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:14:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:14:02,922 INFO L87 Difference]: Start difference. First operand 593 states and 1758 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:04,221 INFO L93 Difference]: Finished difference Result 1048 states and 3034 transitions. [2021-06-05 22:14:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:14:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:04,222 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 22:14:04,222 INFO L226 Difference]: Without dead ends: 903 [2021-06-05 22:14:04,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1187.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:14:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-06-05 22:14:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 653. [2021-06-05 22:14:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.0015337423312882) internal successors, (1957), 652 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1957 transitions. [2021-06-05 22:14:04,229 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1957 transitions. Word has length 21 [2021-06-05 22:14:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:04,229 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1957 transitions. [2021-06-05 22:14:04,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1957 transitions. [2021-06-05 22:14:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:14:04,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:04,230 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:04,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3274 [2021-06-05 22:14:04,431 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:04,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1786467549, now seen corresponding path program 40 times [2021-06-05 22:14:04,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:04,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732386442] [2021-06-05 22:14:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:04,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:04,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732386442] [2021-06-05 22:14:04,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732386442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:04,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179525988] [2021-06-05 22:14:04,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:04,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:04,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179525988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:04,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:04,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:14:04,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314393483] [2021-06-05 22:14:04,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:04,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:04,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:04,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:04,699 INFO L87 Difference]: Start difference. First operand 653 states and 1957 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:05,405 INFO L93 Difference]: Finished difference Result 931 states and 2695 transitions. [2021-06-05 22:14:05,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:14:05,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:05,406 INFO L225 Difference]: With dead ends: 931 [2021-06-05 22:14:05,406 INFO L226 Difference]: Without dead ends: 776 [2021-06-05 22:14:05,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 588.6ms TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:14:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-06-05 22:14:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 598. [2021-06-05 22:14:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 2.959798994974874) internal successors, (1767), 597 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1767 transitions. [2021-06-05 22:14:05,412 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1767 transitions. Word has length 21 [2021-06-05 22:14:05,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:05,412 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1767 transitions. [2021-06-05 22:14:05,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1767 transitions. [2021-06-05 22:14:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:14:05,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:05,413 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:05,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3280 [2021-06-05 22:14:05,613 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:05,614 INFO L82 PathProgramCache]: Analyzing trace with hash 69984509, now seen corresponding path program 41 times [2021-06-05 22:14:05,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:05,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49513830] [2021-06-05 22:14:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:05,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:05,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49513830] [2021-06-05 22:14:05,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49513830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:05,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838855629] [2021-06-05 22:14:05,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:05,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:05,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:05,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:05,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838855629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:05,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:05,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:14:05,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267319937] [2021-06-05 22:14:05,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:14:05,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:05,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:14:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:05,854 INFO L87 Difference]: Start difference. First operand 598 states and 1767 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:06,857 INFO L93 Difference]: Finished difference Result 945 states and 2706 transitions. [2021-06-05 22:14:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:14:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:06,858 INFO L225 Difference]: With dead ends: 945 [2021-06-05 22:14:06,858 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 22:14:06,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 873.1ms TimeCoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:14:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 22:14:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 600. [2021-06-05 22:14:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.9315525876460766) internal successors, (1756), 599 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1756 transitions. [2021-06-05 22:14:06,864 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1756 transitions. Word has length 21 [2021-06-05 22:14:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:06,864 INFO L482 AbstractCegarLoop]: Abstraction has 600 states and 1756 transitions. [2021-06-05 22:14:06,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1756 transitions. [2021-06-05 22:14:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:14:06,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:06,865 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:07,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-06-05 22:14:07,065 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash -291902633, now seen corresponding path program 42 times [2021-06-05 22:14:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:07,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854823528] [2021-06-05 22:14:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:07,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:07,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854823528] [2021-06-05 22:14:07,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854823528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:07,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94084952] [2021-06-05 22:14:07,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:07,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:14:07,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:07,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:07,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94084952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:07,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:07,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:14:07,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324862398] [2021-06-05 22:14:07,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:14:07,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:07,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:14:07,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:07,302 INFO L87 Difference]: Start difference. First operand 600 states and 1756 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:08,786 INFO L93 Difference]: Finished difference Result 1076 states and 3014 transitions. [2021-06-05 22:14:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:14:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:08,788 INFO L225 Difference]: With dead ends: 1076 [2021-06-05 22:14:08,788 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 22:14:08,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1353.1ms TimeCoverageRelationStatistics Valid=482, Invalid=2274, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:14:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 22:14:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 609. [2021-06-05 22:14:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 2.9851973684210527) internal successors, (1815), 608 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1815 transitions. [2021-06-05 22:14:08,794 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1815 transitions. Word has length 21 [2021-06-05 22:14:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:08,794 INFO L482 AbstractCegarLoop]: Abstraction has 609 states and 1815 transitions. [2021-06-05 22:14:08,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1815 transitions. [2021-06-05 22:14:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:14:08,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:08,795 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:08,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3291,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:08,996 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash -162976903, now seen corresponding path program 19 times [2021-06-05 22:14:08,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:08,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241803068] [2021-06-05 22:14:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:09,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:09,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241803068] [2021-06-05 22:14:09,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241803068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:09,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657808740] [2021-06-05 22:14:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:09,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:14:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:09,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:09,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:09,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:09,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,111 INFO L628 ElimStorePlain]: treesize reduction 12, result has 33.3 percent of original size [2021-06-05 22:14:09,111 INFO L518 ElimStorePlain]: Eliminatee last_index_of_3 vanished before elimination [2021-06-05 22:14:09,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:6 [2021-06-05 22:14:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:09,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657808740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:09,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:09,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 22:14:09,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334230815] [2021-06-05 22:14:09,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:14:09,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:14:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:09,124 INFO L87 Difference]: Start difference. First operand 609 states and 1815 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:09,210 INFO L93 Difference]: Finished difference Result 639 states and 1832 transitions. [2021-06-05 22:14:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:09,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:09,210 INFO L225 Difference]: With dead ends: 639 [2021-06-05 22:14:09,210 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 22:14:09,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:14:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 22:14:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 422. [2021-06-05 22:14:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.98812351543943) internal successors, (1258), 421 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1258 transitions. [2021-06-05 22:14:09,215 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1258 transitions. Word has length 21 [2021-06-05 22:14:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:09,215 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1258 transitions. [2021-06-05 22:14:09,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1258 transitions. [2021-06-05 22:14:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:14:09,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:09,215 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:09,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:09,416 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 97257547, now seen corresponding path program 20 times [2021-06-05 22:14:09,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:09,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138632258] [2021-06-05 22:14:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:09,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:09,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138632258] [2021-06-05 22:14:09,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138632258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:09,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280035798] [2021-06-05 22:14:09,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:09,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:09,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:14:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:09,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:09,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:09,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:09,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,525 INFO L628 ElimStorePlain]: treesize reduction 19, result has 24.0 percent of original size [2021-06-05 22:14:09,526 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:14:09,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:14:09,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:6 [2021-06-05 22:14:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:09,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280035798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:09,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:09,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 22:14:09,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988109791] [2021-06-05 22:14:09,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:14:09,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:09,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:14:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:09,542 INFO L87 Difference]: Start difference. First operand 422 states and 1258 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:09,614 INFO L93 Difference]: Finished difference Result 410 states and 1218 transitions. [2021-06-05 22:14:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:09,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:14:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:09,614 INFO L225 Difference]: With dead ends: 410 [2021-06-05 22:14:09,614 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 22:14:09,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:14:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 22:14:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-06-05 22:14:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.052910052910053) internal successors, (1154), 378 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1154 transitions. [2021-06-05 22:14:09,618 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1154 transitions. Word has length 21 [2021-06-05 22:14:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:09,618 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1154 transitions. [2021-06-05 22:14:09,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1154 transitions. [2021-06-05 22:14:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:09,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:09,619 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:09,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:09,820 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:09,820 INFO L82 PathProgramCache]: Analyzing trace with hash -171068830, now seen corresponding path program 43 times [2021-06-05 22:14:09,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:09,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572886589] [2021-06-05 22:14:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:09,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:09,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572886589] [2021-06-05 22:14:09,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572886589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:09,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054524742] [2021-06-05 22:14:09,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:09,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:10,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054524742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:10,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:10,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385918766] [2021-06-05 22:14:10,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:10,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:10,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:10,080 INFO L87 Difference]: Start difference. First operand 379 states and 1154 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:11,040 INFO L93 Difference]: Finished difference Result 683 states and 1958 transitions. [2021-06-05 22:14:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:14:11,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:11,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:11,041 INFO L225 Difference]: With dead ends: 683 [2021-06-05 22:14:11,041 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 22:14:11,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 938.8ms TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:14:11,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 22:14:11,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 397. [2021-06-05 22:14:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0303030303030303) internal successors, (1200), 396 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:11,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1200 transitions. [2021-06-05 22:14:11,045 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1200 transitions. Word has length 22 [2021-06-05 22:14:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:11,045 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1200 transitions. [2021-06-05 22:14:11,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1200 transitions. [2021-06-05 22:14:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:11,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:11,046 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:11,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3306 [2021-06-05 22:14:11,246 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1814460070, now seen corresponding path program 44 times [2021-06-05 22:14:11,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:11,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039572193] [2021-06-05 22:14:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:11,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:11,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039572193] [2021-06-05 22:14:11,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039572193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:11,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224258904] [2021-06-05 22:14:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:11,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:11,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:11,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:11,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224258904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:11,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:11,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:11,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884776898] [2021-06-05 22:14:11,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:11,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:11,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:11,490 INFO L87 Difference]: Start difference. First operand 397 states and 1200 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:12,114 INFO L93 Difference]: Finished difference Result 636 states and 1848 transitions. [2021-06-05 22:14:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:14:12,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:12,115 INFO L225 Difference]: With dead ends: 636 [2021-06-05 22:14:12,115 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 22:14:12,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:14:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 22:14:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 407. [2021-06-05 22:14:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-06-05 22:14:12,119 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 22 [2021-06-05 22:14:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:12,119 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-06-05 22:14:12,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-06-05 22:14:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:12,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:12,120 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:12,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-05 22:14:12,321 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2021502488, now seen corresponding path program 45 times [2021-06-05 22:14:12,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:12,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722715958] [2021-06-05 22:14:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:12,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:12,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722715958] [2021-06-05 22:14:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722715958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524974426] [2021-06-05 22:14:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:12,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:14:12,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:12,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:12,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524974426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:12,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:12,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:14:12,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444518654] [2021-06-05 22:14:12,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:14:12,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:12,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:14:12,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:12,559 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:13,103 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-05 22:14:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:13,119 INFO L93 Difference]: Finished difference Result 697 states and 2059 transitions. [2021-06-05 22:14:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:14:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:13,120 INFO L225 Difference]: With dead ends: 697 [2021-06-05 22:14:13,120 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 22:14:13,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:14:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 22:14:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 442. [2021-06-05 22:14:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.061224489795918) internal successors, (1350), 441 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1350 transitions. [2021-06-05 22:14:13,125 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1350 transitions. Word has length 22 [2021-06-05 22:14:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:13,125 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1350 transitions. [2021-06-05 22:14:13,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1350 transitions. [2021-06-05 22:14:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:13,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:13,125 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:13,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3310,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:13,326 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:13,326 INFO L82 PathProgramCache]: Analyzing trace with hash -631505268, now seen corresponding path program 46 times [2021-06-05 22:14:13,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:13,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917187880] [2021-06-05 22:14:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:13,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:13,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917187880] [2021-06-05 22:14:13,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917187880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:13,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102850743] [2021-06-05 22:14:13,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:13,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:13,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:13,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102850743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:13,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:13,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:13,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185298145] [2021-06-05 22:14:13,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:13,639 INFO L87 Difference]: Start difference. First operand 442 states and 1350 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:14,392 INFO L93 Difference]: Finished difference Result 656 states and 1949 transitions. [2021-06-05 22:14:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:14:14,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:14,393 INFO L225 Difference]: With dead ends: 656 [2021-06-05 22:14:14,393 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 22:14:14,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 777.2ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:14:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 22:14:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 400. [2021-06-05 22:14:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0401002506265664) internal successors, (1213), 399 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1213 transitions. [2021-06-05 22:14:14,398 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1213 transitions. Word has length 22 [2021-06-05 22:14:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:14,398 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1213 transitions. [2021-06-05 22:14:14,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1213 transitions. [2021-06-05 22:14:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:14,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:14,399 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:14,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3318,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:14,599 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:14,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1399293088, now seen corresponding path program 47 times [2021-06-05 22:14:14,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:14,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364839977] [2021-06-05 22:14:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:14,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364839977] [2021-06-05 22:14:14,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364839977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117768736] [2021-06-05 22:14:14,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:14,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:14,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:14,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:14,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:14,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117768736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:14,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:14,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 22:14:14,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367233313] [2021-06-05 22:14:14,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:14,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:14,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:14,843 INFO L87 Difference]: Start difference. First operand 400 states and 1213 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:15,225 INFO L93 Difference]: Finished difference Result 549 states and 1604 transitions. [2021-06-05 22:14:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:14:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:15,226 INFO L225 Difference]: With dead ends: 549 [2021-06-05 22:14:15,226 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:14:15,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:14:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 419. [2021-06-05 22:14:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0430622009569377) internal successors, (1272), 418 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1272 transitions. [2021-06-05 22:14:15,230 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1272 transitions. Word has length 22 [2021-06-05 22:14:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:15,230 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1272 transitions. [2021-06-05 22:14:15,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1272 transitions. [2021-06-05 22:14:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:15,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:15,231 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:15,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:15,431 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1606335506, now seen corresponding path program 48 times [2021-06-05 22:14:15,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:15,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790852943] [2021-06-05 22:14:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:15,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790852943] [2021-06-05 22:14:15,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790852943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:15,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330903795] [2021-06-05 22:14:15,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:15,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:14:15,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:15,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:15,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:15,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:15,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:15,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:15,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:15,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:15,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:15,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:15,845 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,288 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2021-06-05 22:14:16,289 INFO L628 ElimStorePlain]: treesize reduction 408, result has 54.0 percent of original size [2021-06-05 22:14:16,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:16,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,485 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 22:14:16,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:16,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,491 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,496 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,501 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,684 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 22:14:16,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:16,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,690 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,695 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,700 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,876 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 22:14:16,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:16,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,882 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,887 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:16,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:16,891 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,061 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 22:14:17,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:17,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: 15 dim-0 vars, and 16 xjuncts. [2021-06-05 22:14:17,070 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 11 variables, input treesize:985, output treesize:413 [2021-06-05 22:14:17,266 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 103 [2021-06-05 22:14:17,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:17,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:17,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:17,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,652 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-06-05 22:14:17,652 INFO L628 ElimStorePlain]: treesize reduction 267, result has 31.7 percent of original size [2021-06-05 22:14:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:17,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:17,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:17,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:17,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:17,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:17,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:17,786 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:17,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:17,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:17,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:17,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:17,875 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:445, output treesize:13 [2021-06-05 22:14:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:17,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330903795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:17,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:17,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:17,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969939023] [2021-06-05 22:14:17,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:17,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:17,932 INFO L87 Difference]: Start difference. First operand 419 states and 1272 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:18,226 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-06-05 22:14:18,457 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 89 [2021-06-05 22:14:18,672 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-06-05 22:14:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:18,925 INFO L93 Difference]: Finished difference Result 671 states and 1970 transitions. [2021-06-05 22:14:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:14:18,925 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:18,926 INFO L225 Difference]: With dead ends: 671 [2021-06-05 22:14:18,926 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 22:14:18,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1211.1ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:14:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 22:14:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 454. [2021-06-05 22:14:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.0706401766004414) internal successors, (1391), 453 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1391 transitions. [2021-06-05 22:14:18,931 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1391 transitions. Word has length 22 [2021-06-05 22:14:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:18,931 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1391 transitions. [2021-06-05 22:14:18,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1391 transitions. [2021-06-05 22:14:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:18,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:18,931 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:19,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:19,132 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1046672250, now seen corresponding path program 49 times [2021-06-05 22:14:19,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:19,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278484854] [2021-06-05 22:14:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:19,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:19,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278484854] [2021-06-05 22:14:19,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278484854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:19,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521471781] [2021-06-05 22:14:19,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:19,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:19,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521471781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:19,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:19,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:19,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993883943] [2021-06-05 22:14:19,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:19,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:19,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:19,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:19,972 INFO L87 Difference]: Start difference. First operand 454 states and 1391 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:20,411 INFO L93 Difference]: Finished difference Result 569 states and 1705 transitions. [2021-06-05 22:14:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:14:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:20,412 INFO L225 Difference]: With dead ends: 569 [2021-06-05 22:14:20,412 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 22:14:20,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 546.0ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:14:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 22:14:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 409. [2021-06-05 22:14:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.0416666666666665) internal successors, (1241), 408 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1241 transitions. [2021-06-05 22:14:20,416 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1241 transitions. Word has length 22 [2021-06-05 22:14:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:20,416 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1241 transitions. [2021-06-05 22:14:20,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1241 transitions. [2021-06-05 22:14:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:20,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:20,417 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:20,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:20,617 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash 840567118, now seen corresponding path program 50 times [2021-06-05 22:14:20,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:20,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865416463] [2021-06-05 22:14:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:20,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:20,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865416463] [2021-06-05 22:14:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865416463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441525637] [2021-06-05 22:14:20,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:20,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:20,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:21,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:21,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:21,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:21,021 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:21,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:21,031 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:21,036 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,040 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:21,044 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:21,048 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:21,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,056 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,060 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,064 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,067 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:21,072 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,075 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,078 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,081 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:21,085 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:21,089 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,092 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:21,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:21,096 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,104 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:21,107 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:21,264 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-05 22:14:21,265 INFO L628 ElimStorePlain]: treesize reduction 25, result has 88.8 percent of original size [2021-06-05 22:14:21,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 9 xjuncts. [2021-06-05 22:14:21,268 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 2 variables, input treesize:909, output treesize:198 [2021-06-05 22:14:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:21,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441525637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:21,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:21,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:21,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655928277] [2021-06-05 22:14:21,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:21,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:21,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:21,550 INFO L87 Difference]: Start difference. First operand 409 states and 1241 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:21,994 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-06-05 22:14:22,169 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 22:14:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:22,339 INFO L93 Difference]: Finished difference Result 566 states and 1647 transitions. [2021-06-05 22:14:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:14:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:22,340 INFO L225 Difference]: With dead ends: 566 [2021-06-05 22:14:22,340 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 22:14:22,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:14:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 22:14:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 365. [2021-06-05 22:14:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0054945054945055) internal successors, (1094), 364 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1094 transitions. [2021-06-05 22:14:22,344 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1094 transitions. Word has length 22 [2021-06-05 22:14:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:22,344 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1094 transitions. [2021-06-05 22:14:22,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:22,344 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1094 transitions. [2021-06-05 22:14:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:22,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:22,345 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:22,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-05 22:14:22,547 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -479900404, now seen corresponding path program 51 times [2021-06-05 22:14:22,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:22,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642714470] [2021-06-05 22:14:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:22,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:22,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642714470] [2021-06-05 22:14:22,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642714470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:22,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861677789] [2021-06-05 22:14:22,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:22,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:14:22,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:22,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:22,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861677789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:22,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:22,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:14:22,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490317332] [2021-06-05 22:14:22,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:14:22,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:22,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:14:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:14:22,827 INFO L87 Difference]: Start difference. First operand 365 states and 1094 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:23,791 INFO L93 Difference]: Finished difference Result 1011 states and 2930 transitions. [2021-06-05 22:14:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:14:23,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:23,792 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 22:14:23,792 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 22:14:23,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 739.0ms TimeCoverageRelationStatistics Valid=264, Invalid=1628, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:14:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 22:14:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 479. [2021-06-05 22:14:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.062761506276151) internal successors, (1464), 478 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1464 transitions. [2021-06-05 22:14:23,798 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1464 transitions. Word has length 22 [2021-06-05 22:14:23,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:23,798 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1464 transitions. [2021-06-05 22:14:23,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1464 transitions. [2021-06-05 22:14:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:23,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:23,799 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:23,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3742,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:23,999 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2131840522, now seen corresponding path program 52 times [2021-06-05 22:14:24,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:24,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806557080] [2021-06-05 22:14:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:24,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:24,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806557080] [2021-06-05 22:14:24,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806557080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:24,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848413126] [2021-06-05 22:14:24,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:24,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:24,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:24,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:24,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,324 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:24,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:24,332 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,335 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,338 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,341 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,345 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,347 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,350 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,353 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,356 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:24,364 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:24,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 6 xjuncts. [2021-06-05 22:14:24,440 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:591, output treesize:131 [2021-06-05 22:14:25,319 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_54, char_at_5], 10=[v_prenex_53, char_at_9]} [2021-06-05 22:14:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:25,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:25,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:25,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:25,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:25,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,605 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2021-06-05 22:14:25,606 INFO L628 ElimStorePlain]: treesize reduction 804, result has 23.5 percent of original size [2021-06-05 22:14:25,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,621 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,625 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:25,628 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:25,632 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,635 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:25,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:25,697 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,805 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 22:14:25,806 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.4 percent of original size [2021-06-05 22:14:25,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,809 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,813 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,816 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,820 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:25,822 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:25,826 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:25,895 INFO L628 ElimStorePlain]: treesize reduction 14, result has 87.0 percent of original size [2021-06-05 22:14:25,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:25,898 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 13 variables, input treesize:1173, output treesize:12 [2021-06-05 22:14:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:25,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848413126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:25,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:25,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:25,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965352005] [2021-06-05 22:14:25,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:25,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:25,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:25,929 INFO L87 Difference]: Start difference. First operand 479 states and 1464 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:26,061 INFO L93 Difference]: Finished difference Result 826 states and 2450 transitions. [2021-06-05 22:14:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:14:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:26,062 INFO L225 Difference]: With dead ends: 826 [2021-06-05 22:14:26,062 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 22:14:26,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:14:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 22:14:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 506. [2021-06-05 22:14:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.118811881188119) internal successors, (1575), 505 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1575 transitions. [2021-06-05 22:14:26,068 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1575 transitions. Word has length 22 [2021-06-05 22:14:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:26,068 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1575 transitions. [2021-06-05 22:14:26,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1575 transitions. [2021-06-05 22:14:26,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:26,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:26,069 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:26,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3752,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:26,269 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:26,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1577051290, now seen corresponding path program 53 times [2021-06-05 22:14:26,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:26,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776869120] [2021-06-05 22:14:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:26,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:26,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776869120] [2021-06-05 22:14:26,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776869120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:26,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476884143] [2021-06-05 22:14:26,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:26,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:26,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:26,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:26,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:26,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476884143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:26,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:26,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:14:26,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333786179] [2021-06-05 22:14:26,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:14:26,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:26,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:14:26,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:14:26,630 INFO L87 Difference]: Start difference. First operand 506 states and 1575 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:27,724 INFO L93 Difference]: Finished difference Result 942 states and 2870 transitions. [2021-06-05 22:14:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:14:27,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:27,725 INFO L225 Difference]: With dead ends: 942 [2021-06-05 22:14:27,725 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 22:14:27,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 994.2ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:14:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 22:14:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 535. [2021-06-05 22:14:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 3.136704119850187) internal successors, (1675), 534 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1675 transitions. [2021-06-05 22:14:27,733 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1675 transitions. Word has length 22 [2021-06-05 22:14:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:27,733 INFO L482 AbstractCegarLoop]: Abstraction has 535 states and 1675 transitions. [2021-06-05 22:14:27,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1675 transitions. [2021-06-05 22:14:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:27,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:27,734 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:27,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3967 [2021-06-05 22:14:27,951 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:27,951 INFO L82 PathProgramCache]: Analyzing trace with hash -572920134, now seen corresponding path program 54 times [2021-06-05 22:14:27,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:27,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617424935] [2021-06-05 22:14:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:28,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:28,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617424935] [2021-06-05 22:14:28,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617424935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:28,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725198417] [2021-06-05 22:14:28,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:28,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:14:28,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:28,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:28,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:28,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:28,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:28,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:28,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:28,309 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:28,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,318 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,322 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,326 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,330 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,334 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:28,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:28,339 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,343 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,346 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,350 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,354 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,357 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,360 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,364 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:28,367 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:28,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:28,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 9 xjuncts. [2021-06-05 22:14:28,445 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:706, output treesize:184 [2021-06-05 22:14:29,642 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_61, v_prenex_71, v_prenex_60, v_prenex_65, v_prenex_64, v_prenex_63, v_prenex_62, char_at_9, char_at_5], 10=[v_prenex_70]} [2021-06-05 22:14:29,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:29,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:29,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,801 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 40 [2021-06-05 22:14:29,802 INFO L628 ElimStorePlain]: treesize reduction 754, result has 13.8 percent of original size [2021-06-05 22:14:29,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:29,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:29,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:29,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:29,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:29,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_60 vanished before elimination [2021-06-05 22:14:29,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_65 vanished before elimination [2021-06-05 22:14:29,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-06-05 22:14:29,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-06-05 22:14:29,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-06-05 22:14:29,855 INFO L518 ElimStorePlain]: Eliminatee char_at_9 vanished before elimination [2021-06-05 22:14:29,855 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:14:29,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:29,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:29,862 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:29,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:29,868 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:29,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 10 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,900 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 19 variables, input treesize:905, output treesize:6 [2021-06-05 22:14:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:29,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725198417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:29,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:29,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:29,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205387016] [2021-06-05 22:14:29,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:29,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:29,913 INFO L87 Difference]: Start difference. First operand 535 states and 1675 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,188 INFO L93 Difference]: Finished difference Result 772 states and 2339 transitions. [2021-06-05 22:14:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:14:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,189 INFO L225 Difference]: With dead ends: 772 [2021-06-05 22:14:30,189 INFO L226 Difference]: Without dead ends: 726 [2021-06-05 22:14:30,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:14:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-06-05 22:14:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 505. [2021-06-05 22:14:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.0833333333333335) internal successors, (1554), 504 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1554 transitions. [2021-06-05 22:14:30,195 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1554 transitions. Word has length 22 [2021-06-05 22:14:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,195 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1554 transitions. [2021-06-05 22:14:30,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,195 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1554 transitions. [2021-06-05 22:14:30,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:30,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,196 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:30,396 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,396 INFO L82 PathProgramCache]: Analyzing trace with hash -359457940, now seen corresponding path program 55 times [2021-06-05 22:14:30,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094340823] [2021-06-05 22:14:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:30,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094340823] [2021-06-05 22:14:30,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094340823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:30,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111006785] [2021-06-05 22:14:30,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:30,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111006785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:30,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:30,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:14:30,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115417343] [2021-06-05 22:14:30,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:30,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:30,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:30,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:30,757 INFO L87 Difference]: Start difference. First operand 505 states and 1554 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:31,044 INFO L93 Difference]: Finished difference Result 659 states and 1962 transitions. [2021-06-05 22:14:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:14:31,044 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:31,045 INFO L225 Difference]: With dead ends: 659 [2021-06-05 22:14:31,045 INFO L226 Difference]: Without dead ends: 623 [2021-06-05 22:14:31,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:14:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-06-05 22:14:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 512. [2021-06-05 22:14:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.0743639921722115) internal successors, (1571), 511 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1571 transitions. [2021-06-05 22:14:31,056 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1571 transitions. Word has length 22 [2021-06-05 22:14:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:31,056 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1571 transitions. [2021-06-05 22:14:31,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1571 transitions. [2021-06-05 22:14:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:31,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:31,057 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:31,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:31,257 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:31,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2020277362, now seen corresponding path program 56 times [2021-06-05 22:14:31,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:31,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108421811] [2021-06-05 22:14:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:31,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108421811] [2021-06-05 22:14:31,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108421811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:31,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863355465] [2021-06-05 22:14:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:31,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:31,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863355465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:31,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:31,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:31,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436004424] [2021-06-05 22:14:31,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:31,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:31,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:31,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:31,566 INFO L87 Difference]: Start difference. First operand 512 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:31,977 INFO L93 Difference]: Finished difference Result 745 states and 2167 transitions. [2021-06-05 22:14:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:14:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:31,979 INFO L225 Difference]: With dead ends: 745 [2021-06-05 22:14:31,979 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 22:14:31,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 387.2ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 22:14:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 516. [2021-06-05 22:14:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.07378640776699) internal successors, (1583), 515 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1583 transitions. [2021-06-05 22:14:31,984 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1583 transitions. Word has length 22 [2021-06-05 22:14:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:31,984 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1583 transitions. [2021-06-05 22:14:31,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1583 transitions. [2021-06-05 22:14:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:31,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:31,985 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:32,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4290,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:32,185 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:32,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:32,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1595309012, now seen corresponding path program 57 times [2021-06-05 22:14:32,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:32,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136963523] [2021-06-05 22:14:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136963523] [2021-06-05 22:14:32,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136963523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427361498] [2021-06-05 22:14:32,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:32,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:14:32,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:32,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:32,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:32,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:32,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:32,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:32,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:32,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,426 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,429 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:32,432 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,435 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,438 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:32,441 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:32,444 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:32,448 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,451 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,454 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,457 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:32,460 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:32,463 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,473 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,476 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:32,479 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,482 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,485 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,488 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,490 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,493 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,496 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:32,498 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,561 INFO L628 ElimStorePlain]: treesize reduction 21, result has 82.1 percent of original size [2021-06-05 22:14:32,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:14:32,562 INFO L247 ElimStorePlain]: Needed 32 recursive calls to eliminate 1 variables, input treesize:874, output treesize:96 [2021-06-05 22:14:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:32,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427361498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:32,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:32,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:14:32,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257062041] [2021-06-05 22:14:32,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:14:32,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:32,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:14:32,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:32,684 INFO L87 Difference]: Start difference. First operand 516 states and 1583 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:33,222 INFO L93 Difference]: Finished difference Result 854 states and 2508 transitions. [2021-06-05 22:14:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:14:33,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:33,223 INFO L225 Difference]: With dead ends: 854 [2021-06-05 22:14:33,223 INFO L226 Difference]: Without dead ends: 752 [2021-06-05 22:14:33,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:14:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-05 22:14:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 510. [2021-06-05 22:14:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.0785854616895874) internal successors, (1567), 509 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1567 transitions. [2021-06-05 22:14:33,229 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1567 transitions. Word has length 22 [2021-06-05 22:14:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:33,230 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1567 transitions. [2021-06-05 22:14:33,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1567 transitions. [2021-06-05 22:14:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:33,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:33,230 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:33,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4335 [2021-06-05 22:14:33,431 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1139229768, now seen corresponding path program 58 times [2021-06-05 22:14:33,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:33,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259850611] [2021-06-05 22:14:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:33,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:33,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259850611] [2021-06-05 22:14:33,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259850611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:33,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725344831] [2021-06-05 22:14:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:33,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:33,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:34,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725344831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:34,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:34,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:34,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242653529] [2021-06-05 22:14:34,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:34,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:34,047 INFO L87 Difference]: Start difference. First operand 510 states and 1567 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:34,462 INFO L93 Difference]: Finished difference Result 708 states and 2138 transitions. [2021-06-05 22:14:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:14:34,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:34,463 INFO L225 Difference]: With dead ends: 708 [2021-06-05 22:14:34,463 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 22:14:34,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 504.3ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:14:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 22:14:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 507. [2021-06-05 22:14:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.0731225296442686) internal successors, (1555), 506 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1555 transitions. [2021-06-05 22:14:34,469 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1555 transitions. Word has length 22 [2021-06-05 22:14:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:34,469 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1555 transitions. [2021-06-05 22:14:34,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1555 transitions. [2021-06-05 22:14:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:34,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:34,469 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:34,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4348,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:34,670 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 454343106, now seen corresponding path program 59 times [2021-06-05 22:14:34,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:34,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408020615] [2021-06-05 22:14:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:34,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:34,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408020615] [2021-06-05 22:14:34,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408020615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:34,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827012609] [2021-06-05 22:14:34,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:34,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:14:34,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:34,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:34,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:35,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:35,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:35,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:35,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:35,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:35,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:35,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:35,043 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:35,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:35,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:35,054 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:35,057 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:35,060 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:35,062 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:35,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:35,066 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:35,069 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:35,071 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:35,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 6 xjuncts. [2021-06-05 22:14:35,108 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:501, output treesize:101 [2021-06-05 22:14:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:35,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827012609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:35,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:35,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:35,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395613680] [2021-06-05 22:14:35,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:35,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:35,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:35,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:35,541 INFO L87 Difference]: Start difference. First operand 507 states and 1555 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:35,811 INFO L93 Difference]: Finished difference Result 627 states and 1905 transitions. [2021-06-05 22:14:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:14:35,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:35,812 INFO L225 Difference]: With dead ends: 627 [2021-06-05 22:14:35,812 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 22:14:35,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:14:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 22:14:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 507. [2021-06-05 22:14:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.0731225296442686) internal successors, (1555), 506 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1555 transitions. [2021-06-05 22:14:35,817 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1555 transitions. Word has length 22 [2021-06-05 22:14:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:35,818 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1555 transitions. [2021-06-05 22:14:35,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1555 transitions. [2021-06-05 22:14:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:35,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:35,818 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:36,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4524 [2021-06-05 22:14:36,019 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:36,019 INFO L82 PathProgramCache]: Analyzing trace with hash 515862918, now seen corresponding path program 60 times [2021-06-05 22:14:36,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:36,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010229234] [2021-06-05 22:14:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:36,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:36,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010229234] [2021-06-05 22:14:36,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010229234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:36,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708498655] [2021-06-05 22:14:36,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:36,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:14:36,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:36,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:14:36,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:37,138 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_1]} [2021-06-05 22:14:37,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:37,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:37,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:37,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,182 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,188 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:37,195 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,200 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,206 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,211 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,217 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:37,222 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:37,229 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,235 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,241 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,246 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,251 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,257 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,262 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,268 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,272 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,278 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,284 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,290 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,295 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,300 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,305 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,310 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:37,316 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,322 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,327 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,332 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,337 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,342 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,347 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,353 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,357 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,363 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,368 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,376 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,383 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,389 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,396 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,401 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,408 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,414 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,419 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,423 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,429 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,434 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,439 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,443 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,449 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,453 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,460 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,464 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,469 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,474 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,478 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,483 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,488 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:37,493 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,497 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,501 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,505 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,510 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,514 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:37,519 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,524 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,528 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,532 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,536 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,541 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,545 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,550 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,554 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,558 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,563 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,567 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,571 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,574 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,578 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,582 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,586 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,590 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,595 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,599 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,603 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,606 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:37,610 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,709 INFO L628 ElimStorePlain]: treesize reduction 130, result has 48.8 percent of original size [2021-06-05 22:14:37,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:37,713 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:37,716 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,719 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:37,722 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:37,724 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:37,765 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.2 percent of original size [2021-06-05 22:14:37,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:37,766 INFO L247 ElimStorePlain]: Needed 98 recursive calls to eliminate 3 variables, input treesize:3452, output treesize:32 [2021-06-05 22:14:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:37,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708498655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:37,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:37,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:37,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399826546] [2021-06-05 22:14:37,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:37,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:37,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:37,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:37,823 INFO L87 Difference]: Start difference. First operand 507 states and 1555 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:39,162 INFO L93 Difference]: Finished difference Result 989 states and 2876 transitions. [2021-06-05 22:14:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:14:39,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:39,164 INFO L225 Difference]: With dead ends: 989 [2021-06-05 22:14:39,164 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 22:14:39,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1028.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:14:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 22:14:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 489. [2021-06-05 22:14:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.0942622950819674) internal successors, (1510), 488 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1510 transitions. [2021-06-05 22:14:39,169 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1510 transitions. Word has length 22 [2021-06-05 22:14:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:39,170 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1510 transitions. [2021-06-05 22:14:39,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1510 transitions. [2021-06-05 22:14:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:39,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:39,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:39,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-06-05 22:14:39,371 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1159633394, now seen corresponding path program 61 times [2021-06-05 22:14:39,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:39,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677042591] [2021-06-05 22:14:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:39,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677042591] [2021-06-05 22:14:39,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677042591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596729447] [2021-06-05 22:14:39,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:39,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:39,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:39,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:39,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:39,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:39,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:39,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,748 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,749 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,752 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,756 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,759 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,763 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:39,767 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,771 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,774 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:39,778 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,781 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,784 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,787 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,790 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,793 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,796 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:39,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 9 xjuncts. [2021-06-05 22:14:39,859 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:637, output treesize:157 [2021-06-05 22:14:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:40,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596729447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:40,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:40,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:14:40,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120830993] [2021-06-05 22:14:40,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:40,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:40,722 INFO L87 Difference]: Start difference. First operand 489 states and 1510 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,018 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-06-05 22:14:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:41,324 INFO L93 Difference]: Finished difference Result 755 states and 2268 transitions. [2021-06-05 22:14:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:14:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:41,325 INFO L225 Difference]: With dead ends: 755 [2021-06-05 22:14:41,325 INFO L226 Difference]: Without dead ends: 709 [2021-06-05 22:14:41,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 660.8ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:14:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-06-05 22:14:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 431. [2021-06-05 22:14:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.046511627906977) internal successors, (1310), 430 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1310 transitions. [2021-06-05 22:14:41,330 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1310 transitions. Word has length 22 [2021-06-05 22:14:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:41,330 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1310 transitions. [2021-06-05 22:14:41,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1310 transitions. [2021-06-05 22:14:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:41,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:41,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:41,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4905,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:41,531 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:41,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:41,531 INFO L82 PathProgramCache]: Analyzing trace with hash -136496902, now seen corresponding path program 62 times [2021-06-05 22:14:41,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:41,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003752514] [2021-06-05 22:14:41,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:41,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:41,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003752514] [2021-06-05 22:14:41,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003752514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:41,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118719788] [2021-06-05 22:14:41,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:41,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:41,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:41,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:41,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118719788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:41,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:41,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 22:14:41,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853607080] [2021-06-05 22:14:41,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:41,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:41,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:41,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:41,791 INFO L87 Difference]: Start difference. First operand 431 states and 1310 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:42,256 INFO L93 Difference]: Finished difference Result 752 states and 2223 transitions. [2021-06-05 22:14:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:14:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:42,258 INFO L225 Difference]: With dead ends: 752 [2021-06-05 22:14:42,258 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 22:14:42,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:14:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 22:14:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 494. [2021-06-05 22:14:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.0851926977687625) internal successors, (1521), 493 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1521 transitions. [2021-06-05 22:14:42,263 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1521 transitions. Word has length 22 [2021-06-05 22:14:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:42,263 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1521 transitions. [2021-06-05 22:14:42,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1521 transitions. [2021-06-05 22:14:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:42,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:42,264 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:42,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5052,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:42,464 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash 983438164, now seen corresponding path program 63 times [2021-06-05 22:14:42,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:42,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696060315] [2021-06-05 22:14:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:42,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:42,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696060315] [2021-06-05 22:14:42,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696060315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:42,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147077210] [2021-06-05 22:14:42,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:42,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:14:42,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:42,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147077210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:42,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:42,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 22:14:42,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969848939] [2021-06-05 22:14:42,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:42,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:42,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:42,717 INFO L87 Difference]: Start difference. First operand 494 states and 1521 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:43,119 INFO L93 Difference]: Finished difference Result 771 states and 2249 transitions. [2021-06-05 22:14:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:14:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:43,121 INFO L225 Difference]: With dead ends: 771 [2021-06-05 22:14:43,121 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 22:14:43,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:14:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 22:14:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 470. [2021-06-05 22:14:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.0639658848614073) internal successors, (1437), 469 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1437 transitions. [2021-06-05 22:14:43,126 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1437 transitions. Word has length 22 [2021-06-05 22:14:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:43,126 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1437 transitions. [2021-06-05 22:14:43,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1437 transitions. [2021-06-05 22:14:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:43,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:43,127 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:43,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5055 [2021-06-05 22:14:43,327 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1171678198, now seen corresponding path program 64 times [2021-06-05 22:14:43,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:43,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830831073] [2021-06-05 22:14:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:43,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:43,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830831073] [2021-06-05 22:14:43,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830831073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:43,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174145932] [2021-06-05 22:14:43,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:43,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:43,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:43,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:43,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:43,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174145932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:43,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:43,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 22:14:43,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721581329] [2021-06-05 22:14:43,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:43,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:43,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:43,591 INFO L87 Difference]: Start difference. First operand 470 states and 1437 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:44,462 INFO L93 Difference]: Finished difference Result 878 states and 2559 transitions. [2021-06-05 22:14:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:14:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:44,463 INFO L225 Difference]: With dead ends: 878 [2021-06-05 22:14:44,463 INFO L226 Difference]: Without dead ends: 768 [2021-06-05 22:14:44,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:14:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-05 22:14:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 503. [2021-06-05 22:14:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.1254980079681274) internal successors, (1569), 502 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1569 transitions. [2021-06-05 22:14:44,469 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1569 transitions. Word has length 22 [2021-06-05 22:14:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:44,469 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1569 transitions. [2021-06-05 22:14:44,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1569 transitions. [2021-06-05 22:14:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:44,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:44,470 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:44,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5058 [2021-06-05 22:14:44,670 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:44,670 INFO L82 PathProgramCache]: Analyzing trace with hash -51743132, now seen corresponding path program 65 times [2021-06-05 22:14:44,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:44,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672432388] [2021-06-05 22:14:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:44,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672432388] [2021-06-05 22:14:44,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672432388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716994264] [2021-06-05 22:14:44,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:44,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:14:44,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:44,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:44,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716994264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:44,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:44,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:14:44,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987862279] [2021-06-05 22:14:44,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:14:44,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:44,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:14:44,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:44,906 INFO L87 Difference]: Start difference. First operand 503 states and 1569 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:45,102 INFO L93 Difference]: Finished difference Result 719 states and 2119 transitions. [2021-06-05 22:14:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:45,103 INFO L225 Difference]: With dead ends: 719 [2021-06-05 22:14:45,103 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 22:14:45,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 22:14:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 470. [2021-06-05 22:14:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.0874200426439233) internal successors, (1448), 469 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1448 transitions. [2021-06-05 22:14:45,108 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1448 transitions. Word has length 22 [2021-06-05 22:14:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:45,108 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1448 transitions. [2021-06-05 22:14:45,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1448 transitions. [2021-06-05 22:14:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:45,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:45,109 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:45,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5061,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:45,309 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1141845422, now seen corresponding path program 66 times [2021-06-05 22:14:45,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:45,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167646931] [2021-06-05 22:14:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:45,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:45,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167646931] [2021-06-05 22:14:45,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167646931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:45,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086761516] [2021-06-05 22:14:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:45,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:14:45,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:45,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086761516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:45,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:45,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:45,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19981670] [2021-06-05 22:14:45,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:45,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:45,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:45,526 INFO L87 Difference]: Start difference. First operand 470 states and 1448 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:46,248 INFO L93 Difference]: Finished difference Result 899 states and 2610 transitions. [2021-06-05 22:14:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:14:46,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:46,249 INFO L225 Difference]: With dead ends: 899 [2021-06-05 22:14:46,249 INFO L226 Difference]: Without dead ends: 767 [2021-06-05 22:14:46,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:14:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-06-05 22:14:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 521. [2021-06-05 22:14:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-06-05 22:14:46,255 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 22 [2021-06-05 22:14:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:46,255 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-06-05 22:14:46,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-06-05 22:14:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:46,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:46,256 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:46,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5071 [2021-06-05 22:14:46,456 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2133094148, now seen corresponding path program 67 times [2021-06-05 22:14:46,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:46,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224047833] [2021-06-05 22:14:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:46,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:46,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224047833] [2021-06-05 22:14:46,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224047833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:46,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309885227] [2021-06-05 22:14:46,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:46,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309885227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:46,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:46,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:46,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718504665] [2021-06-05 22:14:46,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:46,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:46,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:46,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:46,684 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:47,370 INFO L93 Difference]: Finished difference Result 889 states and 2615 transitions. [2021-06-05 22:14:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:14:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:47,371 INFO L225 Difference]: With dead ends: 889 [2021-06-05 22:14:47,371 INFO L226 Difference]: Without dead ends: 803 [2021-06-05 22:14:47,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 572.6ms TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:14:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-05 22:14:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 507. [2021-06-05 22:14:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.0968379446640317) internal successors, (1567), 506 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1567 transitions. [2021-06-05 22:14:47,377 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1567 transitions. Word has length 22 [2021-06-05 22:14:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:47,377 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1567 transitions. [2021-06-05 22:14:47,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1567 transitions. [2021-06-05 22:14:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:47,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:47,378 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:47,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5075,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:47,579 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:47,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1256194908, now seen corresponding path program 68 times [2021-06-05 22:14:47,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:47,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586811546] [2021-06-05 22:14:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:47,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:47,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586811546] [2021-06-05 22:14:47,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586811546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:47,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480847383] [2021-06-05 22:14:47,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:47,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:47,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:47,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:47,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:47,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:47,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:47,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:47,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:47,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:47,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:47,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:47,982 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:47,986 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:47,990 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:47,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:47,995 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:47,999 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:48,003 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,007 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:48,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:48,011 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,015 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:48,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:48,020 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:48,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:48,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:48,024 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,028 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,031 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,035 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,038 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,041 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:48,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:48,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:48,046 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,049 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:48,052 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:48,209 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-06-05 22:14:48,209 INFO L628 ElimStorePlain]: treesize reduction 33, result has 87.6 percent of original size [2021-06-05 22:14:48,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 9 xjuncts. [2021-06-05 22:14:48,215 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:981, output treesize:226 [2021-06-05 22:14:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:48,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480847383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:48,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:48,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:14:48,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291712734] [2021-06-05 22:14:48,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:14:48,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:14:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:48,453 INFO L87 Difference]: Start difference. First operand 507 states and 1567 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:48,702 INFO L93 Difference]: Finished difference Result 677 states and 2030 transitions. [2021-06-05 22:14:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:14:48,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:48,703 INFO L225 Difference]: With dead ends: 677 [2021-06-05 22:14:48,703 INFO L226 Difference]: Without dead ends: 667 [2021-06-05 22:14:48,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-06-05 22:14:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 529. [2021-06-05 22:14:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.106060606060606) internal successors, (1640), 528 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1640 transitions. [2021-06-05 22:14:48,709 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1640 transitions. Word has length 22 [2021-06-05 22:14:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:48,709 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1640 transitions. [2021-06-05 22:14:48,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1640 transitions. [2021-06-05 22:14:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:48,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:48,710 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:48,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5082,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:48,910 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:48,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1236858428, now seen corresponding path program 69 times [2021-06-05 22:14:48,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:48,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924629575] [2021-06-05 22:14:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:48,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:48,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924629575] [2021-06-05 22:14:48,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924629575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:48,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518771341] [2021-06-05 22:14:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:49,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:14:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:49,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:49,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518771341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:49,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:49,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 22:14:49,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233734623] [2021-06-05 22:14:49,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:49,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:49,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:49,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:49,174 INFO L87 Difference]: Start difference. First operand 529 states and 1640 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:49,706 INFO L93 Difference]: Finished difference Result 849 states and 2487 transitions. [2021-06-05 22:14:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:14:49,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:49,707 INFO L225 Difference]: With dead ends: 849 [2021-06-05 22:14:49,707 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 22:14:49,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:14:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 22:14:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 492. [2021-06-05 22:14:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.0773930753564156) internal successors, (1511), 491 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1511 transitions. [2021-06-05 22:14:49,713 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1511 transitions. Word has length 22 [2021-06-05 22:14:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:49,713 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1511 transitions. [2021-06-05 22:14:49,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1511 transitions. [2021-06-05 22:14:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:49,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:49,714 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:49,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5170 [2021-06-05 22:14:49,914 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:49,914 INFO L82 PathProgramCache]: Analyzing trace with hash -367421658, now seen corresponding path program 70 times [2021-06-05 22:14:49,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:49,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388156008] [2021-06-05 22:14:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:50,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:50,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388156008] [2021-06-05 22:14:50,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388156008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:50,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10956921] [2021-06-05 22:14:50,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:50,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:50,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:50,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:50,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:50,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10956921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:50,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:50,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 22:14:50,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646468430] [2021-06-05 22:14:50,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:14:50,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:14:50,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:50,235 INFO L87 Difference]: Start difference. First operand 492 states and 1511 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:50,706 INFO L93 Difference]: Finished difference Result 647 states and 1971 transitions. [2021-06-05 22:14:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:14:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:50,707 INFO L225 Difference]: With dead ends: 647 [2021-06-05 22:14:50,707 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 22:14:50,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:14:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 22:14:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 503. [2021-06-05 22:14:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.091633466135458) internal successors, (1552), 502 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1552 transitions. [2021-06-05 22:14:50,713 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1552 transitions. Word has length 22 [2021-06-05 22:14:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:50,713 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1552 transitions. [2021-06-05 22:14:50,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1552 transitions. [2021-06-05 22:14:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:50,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:50,713 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:50,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5176 [2021-06-05 22:14:50,933 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash 861367590, now seen corresponding path program 71 times [2021-06-05 22:14:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:50,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492543147] [2021-06-05 22:14:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:50,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:50,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492543147] [2021-06-05 22:14:50,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492543147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:50,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928861028] [2021-06-05 22:14:50,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:51,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:51,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:51,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928861028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:51,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:51,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:51,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81453170] [2021-06-05 22:14:51,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:51,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:51,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:51,233 INFO L87 Difference]: Start difference. First operand 503 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:52,497 INFO L93 Difference]: Finished difference Result 957 states and 2836 transitions. [2021-06-05 22:14:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:14:52,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:52,499 INFO L225 Difference]: With dead ends: 957 [2021-06-05 22:14:52,499 INFO L226 Difference]: Without dead ends: 829 [2021-06-05 22:14:52,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 952.6ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:14:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-06-05 22:14:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 525. [2021-06-05 22:14:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.1393129770992365) internal successors, (1645), 524 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1645 transitions. [2021-06-05 22:14:52,505 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1645 transitions. Word has length 22 [2021-06-05 22:14:52,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:52,505 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1645 transitions. [2021-06-05 22:14:52,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1645 transitions. [2021-06-05 22:14:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:52,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:52,506 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:52,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5180,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:52,722 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash -651355128, now seen corresponding path program 72 times [2021-06-05 22:14:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:52,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614137321] [2021-06-05 22:14:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:52,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:52,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614137321] [2021-06-05 22:14:52,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614137321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:52,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179997165] [2021-06-05 22:14:52,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:52,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:14:52,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:52,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:52,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:52,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179997165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:52,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:52,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:52,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3149603] [2021-06-05 22:14:52,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:52,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:52,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:52,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:52,957 INFO L87 Difference]: Start difference. First operand 525 states and 1645 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:53,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:53,452 INFO L93 Difference]: Finished difference Result 787 states and 2370 transitions. [2021-06-05 22:14:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:14:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:53,453 INFO L225 Difference]: With dead ends: 787 [2021-06-05 22:14:53,453 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 22:14:53,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:14:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 22:14:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 470. [2021-06-05 22:14:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.1194029850746268) internal successors, (1463), 469 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1463 transitions. [2021-06-05 22:14:53,459 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1463 transitions. Word has length 22 [2021-06-05 22:14:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:53,459 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1463 transitions. [2021-06-05 22:14:53,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1463 transitions. [2021-06-05 22:14:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:53,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:53,459 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:53,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5193 [2021-06-05 22:14:53,665 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:53,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1471737370, now seen corresponding path program 73 times [2021-06-05 22:14:53,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:53,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929546547] [2021-06-05 22:14:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:53,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929546547] [2021-06-05 22:14:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929546547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412613059] [2021-06-05 22:14:53,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:53,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:53,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412613059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:53,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:53,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:14:53,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329883379] [2021-06-05 22:14:53,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:53,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:53,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:53,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:53,872 INFO L87 Difference]: Start difference. First operand 470 states and 1463 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:54,341 INFO L93 Difference]: Finished difference Result 657 states and 1962 transitions. [2021-06-05 22:14:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:14:54,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:54,342 INFO L225 Difference]: With dead ends: 657 [2021-06-05 22:14:54,343 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 22:14:54,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:14:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 22:14:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 397. [2021-06-05 22:14:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.073232323232323) internal successors, (1217), 396 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1217 transitions. [2021-06-05 22:14:54,347 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1217 transitions. Word has length 22 [2021-06-05 22:14:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:54,347 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1217 transitions. [2021-06-05 22:14:54,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1217 transitions. [2021-06-05 22:14:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:54,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:54,348 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:54,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5196 [2021-06-05 22:14:54,549 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1851817696, now seen corresponding path program 74 times [2021-06-05 22:14:54,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:54,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228855283] [2021-06-05 22:14:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:54,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:54,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228855283] [2021-06-05 22:14:54,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228855283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:54,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060516021] [2021-06-05 22:14:54,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:54,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:54,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:54,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060516021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:54,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:54,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:14:54,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370425403] [2021-06-05 22:14:54,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:54,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:54,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:54,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:54,773 INFO L87 Difference]: Start difference. First operand 397 states and 1217 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:54,969 INFO L93 Difference]: Finished difference Result 555 states and 1655 transitions. [2021-06-05 22:14:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:14:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:54,970 INFO L225 Difference]: With dead ends: 555 [2021-06-05 22:14:54,970 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 22:14:54,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 22:14:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 403. [2021-06-05 22:14:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.072139303482587) internal successors, (1235), 402 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1235 transitions. [2021-06-05 22:14:54,975 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1235 transitions. Word has length 22 [2021-06-05 22:14:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:54,975 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1235 transitions. [2021-06-05 22:14:54,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1235 transitions. [2021-06-05 22:14:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:54,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:54,975 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:55,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5198 [2021-06-05 22:14:55,189 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash -43086534, now seen corresponding path program 75 times [2021-06-05 22:14:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:55,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009331282] [2021-06-05 22:14:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:55,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009331282] [2021-06-05 22:14:55,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009331282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902242379] [2021-06-05 22:14:55,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:55,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:14:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:55,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902242379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:55,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:55,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:14:55,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369516025] [2021-06-05 22:14:55,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:55,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:55,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:55,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:55,425 INFO L87 Difference]: Start difference. First operand 403 states and 1235 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:55,631 INFO L93 Difference]: Finished difference Result 565 states and 1688 transitions. [2021-06-05 22:14:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:14:55,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:55,632 INFO L225 Difference]: With dead ends: 565 [2021-06-05 22:14:55,632 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 22:14:55,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:14:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 22:14:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 406. [2021-06-05 22:14:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.071604938271605) internal successors, (1244), 405 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1244 transitions. [2021-06-05 22:14:55,637 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1244 transitions. Word has length 22 [2021-06-05 22:14:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:55,637 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1244 transitions. [2021-06-05 22:14:55,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1244 transitions. [2021-06-05 22:14:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:55,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:55,637 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:55,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5200 [2021-06-05 22:14:55,839 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:55,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash -507420384, now seen corresponding path program 76 times [2021-06-05 22:14:55,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:55,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536616143] [2021-06-05 22:14:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:55,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:55,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536616143] [2021-06-05 22:14:55,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536616143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:55,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661977725] [2021-06-05 22:14:55,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:55,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:55,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:55,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661977725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:56,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:56,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817853585] [2021-06-05 22:14:56,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:56,072 INFO L87 Difference]: Start difference. First operand 406 states and 1244 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:56,860 INFO L93 Difference]: Finished difference Result 934 states and 2679 transitions. [2021-06-05 22:14:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:14:56,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:56,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:56,861 INFO L225 Difference]: With dead ends: 934 [2021-06-05 22:14:56,861 INFO L226 Difference]: Without dead ends: 838 [2021-06-05 22:14:56,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:14:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-06-05 22:14:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 455. [2021-06-05 22:14:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.0969162995594712) internal successors, (1406), 454 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1406 transitions. [2021-06-05 22:14:56,867 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1406 transitions. Word has length 22 [2021-06-05 22:14:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:56,867 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1406 transitions. [2021-06-05 22:14:56,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1406 transitions. [2021-06-05 22:14:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:56,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:56,868 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:57,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5202,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:57,069 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 863074426, now seen corresponding path program 77 times [2021-06-05 22:14:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232984537] [2021-06-05 22:14:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:57,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232984537] [2021-06-05 22:14:57,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232984537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277558781] [2021-06-05 22:14:57,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:57,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:14:57,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:57,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:57,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277558781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:57,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:57,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:57,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186863021] [2021-06-05 22:14:57,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:57,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:57,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:57,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:57,354 INFO L87 Difference]: Start difference. First operand 455 states and 1406 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:57,800 INFO L93 Difference]: Finished difference Result 803 states and 2320 transitions. [2021-06-05 22:14:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:14:57,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:57,801 INFO L225 Difference]: With dead ends: 803 [2021-06-05 22:14:57,801 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 22:14:57,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:14:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 22:14:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 392. [2021-06-05 22:14:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.051150895140665) internal successors, (1193), 391 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1193 transitions. [2021-06-05 22:14:57,806 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1193 transitions. Word has length 22 [2021-06-05 22:14:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:57,806 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1193 transitions. [2021-06-05 22:14:57,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1193 transitions. [2021-06-05 22:14:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:57,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:57,807 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:58,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5206 [2021-06-05 22:14:58,021 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 993948904, now seen corresponding path program 78 times [2021-06-05 22:14:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000093643] [2021-06-05 22:14:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:58,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:58,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000093643] [2021-06-05 22:14:58,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000093643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:58,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042896456] [2021-06-05 22:14:58,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:58,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:14:58,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:58,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:58,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:58,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042896456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:58,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:58,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:58,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805401809] [2021-06-05 22:14:58,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:58,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:58,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:58,259 INFO L87 Difference]: Start difference. First operand 392 states and 1193 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:59,104 INFO L93 Difference]: Finished difference Result 867 states and 2428 transitions. [2021-06-05 22:14:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:14:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:14:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:59,105 INFO L225 Difference]: With dead ends: 867 [2021-06-05 22:14:59,106 INFO L226 Difference]: Without dead ends: 661 [2021-06-05 22:14:59,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 736.9ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:14:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-05 22:14:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 392. [2021-06-05 22:14:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0153452685421995) internal successors, (1179), 391 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1179 transitions. [2021-06-05 22:14:59,110 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1179 transitions. Word has length 22 [2021-06-05 22:14:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:59,110 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1179 transitions. [2021-06-05 22:14:59,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1179 transitions. [2021-06-05 22:14:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:14:59,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:59,111 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:59,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5210 [2021-06-05 22:14:59,311 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash 244300430, now seen corresponding path program 79 times [2021-06-05 22:14:59,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:59,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106372934] [2021-06-05 22:14:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:59,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106372934] [2021-06-05 22:14:59,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106372934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335482227] [2021-06-05 22:14:59,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:14:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:59,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:59,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:14:59,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:59,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:59,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:59,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:59,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:59,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:59,695 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:14:59,699 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,702 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:14:59,707 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:59,711 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,715 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,719 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:14:59,723 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,726 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,729 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,732 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,736 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,739 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,742 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:14:59,745 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,748 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,883 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-05 22:14:59,883 INFO L628 ElimStorePlain]: treesize reduction 30, result has 87.3 percent of original size [2021-06-05 22:14:59,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 9 xjuncts. [2021-06-05 22:14:59,887 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:897, output treesize:199 [2021-06-05 22:15:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:00,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335482227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:00,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:00,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:15:00,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671618577] [2021-06-05 22:15:00,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:15:00,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:00,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:15:00,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:00,199 INFO L87 Difference]: Start difference. First operand 392 states and 1179 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:00,660 INFO L93 Difference]: Finished difference Result 577 states and 1674 transitions. [2021-06-05 22:15:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:15:00,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:15:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:00,662 INFO L225 Difference]: With dead ends: 577 [2021-06-05 22:15:00,662 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 22:15:00,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 22:15:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 416. [2021-06-05 22:15:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.0096385542168673) internal successors, (1249), 415 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1249 transitions. [2021-06-05 22:15:00,666 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1249 transitions. Word has length 22 [2021-06-05 22:15:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:00,666 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1249 transitions. [2021-06-05 22:15:00,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1249 transitions. [2021-06-05 22:15:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:15:00,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:00,667 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:00,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5215,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:00,877 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash 263636910, now seen corresponding path program 80 times [2021-06-05 22:15:00,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:00,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819206288] [2021-06-05 22:15:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:00,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:00,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819206288] [2021-06-05 22:15:00,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819206288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:00,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489641326] [2021-06-05 22:15:00,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:00,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:00,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:00,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:15:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:01,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489641326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:01,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:01,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:15:01,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997839853] [2021-06-05 22:15:01,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:15:01,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:15:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:01,136 INFO L87 Difference]: Start difference. First operand 416 states and 1249 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:02,223 INFO L93 Difference]: Finished difference Result 727 states and 2063 transitions. [2021-06-05 22:15:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:15:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:15:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:02,224 INFO L225 Difference]: With dead ends: 727 [2021-06-05 22:15:02,224 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 22:15:02,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 941.5ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:15:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 22:15:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 371. [2021-06-05 22:15:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.983783783783784) internal successors, (1104), 370 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1104 transitions. [2021-06-05 22:15:02,232 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1104 transitions. Word has length 22 [2021-06-05 22:15:02,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:02,232 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1104 transitions. [2021-06-05 22:15:02,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,232 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1104 transitions. [2021-06-05 22:15:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:02,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:02,232 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:02,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5303,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:02,433 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:02,433 INFO L82 PathProgramCache]: Analyzing trace with hash -211869843, now seen corresponding path program 81 times [2021-06-05 22:15:02,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:02,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540472489] [2021-06-05 22:15:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:02,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:02,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540472489] [2021-06-05 22:15:02,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540472489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:02,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862226858] [2021-06-05 22:15:02,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:02,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:15:02,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:02,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:02,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:02,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862226858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:02,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:02,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:15:02,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835787470] [2021-06-05 22:15:02,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:15:02,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:02,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:15:02,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:02,857 INFO L87 Difference]: Start difference. First operand 371 states and 1104 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:03,180 INFO L93 Difference]: Finished difference Result 540 states and 1597 transitions. [2021-06-05 22:15:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:03,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:03,181 INFO L225 Difference]: With dead ends: 540 [2021-06-05 22:15:03,181 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 22:15:03,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:15:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 22:15:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 383. [2021-06-05 22:15:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.0) internal successors, (1146), 382 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1146 transitions. [2021-06-05 22:15:03,185 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1146 transitions. Word has length 23 [2021-06-05 22:15:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:03,185 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1146 transitions. [2021-06-05 22:15:03,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1146 transitions. [2021-06-05 22:15:03,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:03,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:03,186 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:03,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5308,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:03,387 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:03,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1867717003, now seen corresponding path program 82 times [2021-06-05 22:15:03,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:03,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144819805] [2021-06-05 22:15:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:03,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:03,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144819805] [2021-06-05 22:15:03,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144819805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:03,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173810173] [2021-06-05 22:15:03,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:03,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:03,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:03,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:03,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173810173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:03,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:03,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:15:03,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781180625] [2021-06-05 22:15:03,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:15:03,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:03,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:15:03,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:15:03,711 INFO L87 Difference]: Start difference. First operand 383 states and 1146 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:04,090 INFO L93 Difference]: Finished difference Result 578 states and 1697 transitions. [2021-06-05 22:15:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:04,091 INFO L225 Difference]: With dead ends: 578 [2021-06-05 22:15:04,091 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 22:15:04,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:15:04,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 22:15:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 377. [2021-06-05 22:15:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.984042553191489) internal successors, (1122), 376 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1122 transitions. [2021-06-05 22:15:04,095 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1122 transitions. Word has length 23 [2021-06-05 22:15:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:04,095 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1122 transitions. [2021-06-05 22:15:04,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1122 transitions. [2021-06-05 22:15:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:04,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:04,095 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:04,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5322 [2021-06-05 22:15:04,296 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:04,296 INFO L82 PathProgramCache]: Analyzing trace with hash 544876595, now seen corresponding path program 83 times [2021-06-05 22:15:04,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:04,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73620239] [2021-06-05 22:15:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:04,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:04,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73620239] [2021-06-05 22:15:04,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73620239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:04,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182325152] [2021-06-05 22:15:04,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:04,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:04,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:04,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:04,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182325152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:04,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:04,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:15:04,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644858248] [2021-06-05 22:15:04,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:15:04,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:04,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:15:04,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:04,624 INFO L87 Difference]: Start difference. First operand 377 states and 1122 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:06,867 INFO L93 Difference]: Finished difference Result 1167 states and 3417 transitions. [2021-06-05 22:15:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:15:06,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:06,869 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 22:15:06,869 INFO L226 Difference]: Without dead ends: 990 [2021-06-05 22:15:06,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1528.8ms TimeCoverageRelationStatistics Valid=355, Invalid=3185, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:15:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-06-05 22:15:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 462. [2021-06-05 22:15:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.056399132321041) internal successors, (1409), 461 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1409 transitions. [2021-06-05 22:15:06,876 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1409 transitions. Word has length 23 [2021-06-05 22:15:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:06,876 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1409 transitions. [2021-06-05 22:15:06,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1409 transitions. [2021-06-05 22:15:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:06,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:06,876 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:07,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5333 [2021-06-05 22:15:07,077 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:07,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:07,077 INFO L82 PathProgramCache]: Analyzing trace with hash 842785489, now seen corresponding path program 84 times [2021-06-05 22:15:07,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:07,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148209612] [2021-06-05 22:15:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:07,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:07,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148209612] [2021-06-05 22:15:07,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148209612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:07,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449461744] [2021-06-05 22:15:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:07,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:07,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:07,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:07,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:07,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449461744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:07,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:07,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:15:07,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589535225] [2021-06-05 22:15:07,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:15:07,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:07,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:15:07,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:15:07,448 INFO L87 Difference]: Start difference. First operand 462 states and 1409 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:10,266 INFO L93 Difference]: Finished difference Result 1392 states and 4164 transitions. [2021-06-05 22:15:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:15:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:10,268 INFO L225 Difference]: With dead ends: 1392 [2021-06-05 22:15:10,268 INFO L226 Difference]: Without dead ends: 1228 [2021-06-05 22:15:10,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 2170.0ms TimeCoverageRelationStatistics Valid=804, Invalid=6336, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 22:15:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-05 22:15:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 512. [2021-06-05 22:15:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.146771037181996) internal successors, (1608), 511 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1608 transitions. [2021-06-05 22:15:10,275 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1608 transitions. Word has length 23 [2021-06-05 22:15:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:10,275 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1608 transitions. [2021-06-05 22:15:10,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1608 transitions. [2021-06-05 22:15:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:10,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:10,276 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:10,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5345,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:10,476 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1522547371, now seen corresponding path program 85 times [2021-06-05 22:15:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:10,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540347124] [2021-06-05 22:15:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:10,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:10,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540347124] [2021-06-05 22:15:10,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540347124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:10,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514579874] [2021-06-05 22:15:10,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:10,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:12,191 INFO L446 ElimStorePlain]: Different costs {0=[char_at_1], 1=[char_at_5]} [2021-06-05 22:15:12,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:12,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:12,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:12,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:12,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,233 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:12,239 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,244 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:12,250 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,256 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:12,262 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,268 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,274 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,279 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,285 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,290 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,295 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,300 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,305 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,310 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,314 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,319 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:12,330 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,336 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,341 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,346 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,351 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,357 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,362 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,367 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,372 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,378 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,382 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,387 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,391 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,403 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,408 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,412 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,416 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,421 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,425 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,429 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,434 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,438 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,442 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,446 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,449 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,453 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,457 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,461 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,465 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,468 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,472 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,476 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,479 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,484 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,488 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,491 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,495 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,498 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,502 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,505 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,509 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,512 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,516 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,519 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,522 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,526 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,529 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,532 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,536 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,539 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,635 INFO L628 ElimStorePlain]: treesize reduction 52, result has 70.8 percent of original size [2021-06-05 22:15:12,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:12,639 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:12,643 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:12,646 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,649 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:12,651 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,692 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.2 percent of original size [2021-06-05 22:15:12,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:12,693 INFO L247 ElimStorePlain]: Needed 79 recursive calls to eliminate 3 variables, input treesize:2679, output treesize:32 [2021-06-05 22:15:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:12,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514579874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:12,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:12,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:15:12,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504415108] [2021-06-05 22:15:12,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:15:12,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:12,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:15:12,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:15:12,759 INFO L87 Difference]: Start difference. First operand 512 states and 1608 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:13,035 INFO L93 Difference]: Finished difference Result 949 states and 2886 transitions. [2021-06-05 22:15:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:15:13,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:13,036 INFO L225 Difference]: With dead ends: 949 [2021-06-05 22:15:13,036 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 22:15:13,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:15:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 22:15:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 556. [2021-06-05 22:15:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.1765765765765765) internal successors, (1763), 555 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1763 transitions. [2021-06-05 22:15:13,043 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1763 transitions. Word has length 23 [2021-06-05 22:15:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:13,043 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1763 transitions. [2021-06-05 22:15:13,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1763 transitions. [2021-06-05 22:15:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:13,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:13,044 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:13,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5356,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:13,253 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash 642251707, now seen corresponding path program 86 times [2021-06-05 22:15:13,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:13,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110555405] [2021-06-05 22:15:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:13,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:13,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110555405] [2021-06-05 22:15:13,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110555405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:13,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696856316] [2021-06-05 22:15:13,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:13,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:13,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:13,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:13,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696856316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:13,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:13,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:15:13,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912752010] [2021-06-05 22:15:13,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:15:13,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:15:13,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:15:13,619 INFO L87 Difference]: Start difference. First operand 556 states and 1763 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:15,124 INFO L93 Difference]: Finished difference Result 1127 states and 3350 transitions. [2021-06-05 22:15:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:15:15,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:15,126 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 22:15:15,126 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 22:15:15,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 966.9ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:15:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 22:15:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 577. [2021-06-05 22:15:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.2100694444444446) internal successors, (1849), 576 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1849 transitions. [2021-06-05 22:15:15,133 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1849 transitions. Word has length 23 [2021-06-05 22:15:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:15,133 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1849 transitions. [2021-06-05 22:15:15,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1849 transitions. [2021-06-05 22:15:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:15,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:15,134 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:15,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5928 [2021-06-05 22:15:15,334 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2106051753, now seen corresponding path program 87 times [2021-06-05 22:15:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:15,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409648619] [2021-06-05 22:15:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:15,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:15,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409648619] [2021-06-05 22:15:15,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409648619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:15,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755144182] [2021-06-05 22:15:15,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:15,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:15:15,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:15,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:15,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:15,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:15,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,646 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:15,653 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,657 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,660 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,663 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,667 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:15,670 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,673 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,676 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,679 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:15,683 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:15,687 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,690 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,693 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,696 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,699 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,702 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,705 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:15,707 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,800 INFO L628 ElimStorePlain]: treesize reduction 66, result has 62.3 percent of original size [2021-06-05 22:15:15,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:15:15,803 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 2 variables, input treesize:963, output treesize:101 [2021-06-05 22:15:16,436 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_96, char_at_5], 1=[char_at_1]} [2021-06-05 22:15:16,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:16,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:16,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,701 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-06-05 22:15:16,702 INFO L628 ElimStorePlain]: treesize reduction 1190, result has 17.8 percent of original size [2021-06-05 22:15:16,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:16,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:16,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:16,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:16,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:16,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:16,719 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,801 INFO L628 ElimStorePlain]: treesize reduction 46, result has 72.1 percent of original size [2021-06-05 22:15:16,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:16,805 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:16,807 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:16,810 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,854 INFO L628 ElimStorePlain]: treesize reduction 18, result has 78.0 percent of original size [2021-06-05 22:15:16,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:16,855 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:1471, output treesize:34 [2021-06-05 22:15:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:16,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755144182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:16,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:16,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:15:16,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206465387] [2021-06-05 22:15:16,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:15:16,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:15:16,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:16,914 INFO L87 Difference]: Start difference. First operand 577 states and 1849 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:17,124 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 22:15:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:17,345 INFO L93 Difference]: Finished difference Result 750 states and 2347 transitions. [2021-06-05 22:15:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:15:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:17,346 INFO L225 Difference]: With dead ends: 750 [2021-06-05 22:15:17,346 INFO L226 Difference]: Without dead ends: 711 [2021-06-05 22:15:17,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 506.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:15:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-06-05 22:15:17,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 582. [2021-06-05 22:15:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.2220309810671255) internal successors, (1872), 581 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1872 transitions. [2021-06-05 22:15:17,352 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1872 transitions. Word has length 23 [2021-06-05 22:15:17,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:17,352 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 1872 transitions. [2021-06-05 22:15:17,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1872 transitions. [2021-06-05 22:15:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:17,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:17,353 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:17,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5942,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:17,554 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:17,554 INFO L82 PathProgramCache]: Analyzing trace with hash 911986167, now seen corresponding path program 88 times [2021-06-05 22:15:17,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:17,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007988883] [2021-06-05 22:15:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:17,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:17,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007988883] [2021-06-05 22:15:17,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007988883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:17,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193437984] [2021-06-05 22:15:17,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:17,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:17,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:17,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:17,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:17,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:17,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:17,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:17,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,847 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,850 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,853 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:17,857 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:17,861 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:17,864 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,868 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:17,871 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,874 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,877 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,881 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,884 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,887 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,890 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:17,893 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,896 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,899 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,902 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,905 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,994 INFO L628 ElimStorePlain]: treesize reduction 122, result has 47.2 percent of original size [2021-06-05 22:15:17,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:15:17,998 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 2 variables, input treesize:947, output treesize:101 [2021-06-05 22:15:18,566 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 91 [2021-06-05 22:15:19,845 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_99, char_at_5], 6=[char_at_1]} [2021-06-05 22:15:19,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:19,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:19,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,895 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,902 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:19,910 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:19,917 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:19,925 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,931 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,937 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:19,945 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,952 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,965 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,971 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,979 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:19,985 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:19,993 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,006 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,016 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,023 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,033 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,041 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,047 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,053 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,060 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,067 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,073 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,078 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,085 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,091 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,099 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,106 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,119 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,128 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,136 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,144 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,150 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,158 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,167 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,174 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,182 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,191 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,198 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,204 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,211 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,217 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,224 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,231 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,238 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,245 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,252 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,258 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,265 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,271 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,278 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,287 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,293 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,299 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,306 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,312 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,596 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-06-05 22:15:20,597 INFO L628 ElimStorePlain]: treesize reduction 648, result has 29.3 percent of original size [2021-06-05 22:15:20,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:20,603 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:20,607 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,743 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 22:15:20,743 INFO L628 ElimStorePlain]: treesize reduction 70, result has 71.4 percent of original size [2021-06-05 22:15:20,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:20,748 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:20,752 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:20,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:20,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:20,757 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:20,761 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:20,764 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,839 INFO L628 ElimStorePlain]: treesize reduction 22, result has 82.3 percent of original size [2021-06-05 22:15:20,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:20,841 INFO L247 ElimStorePlain]: Needed 71 recursive calls to eliminate 7 variables, input treesize:3521, output treesize:37 [2021-06-05 22:15:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:20,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193437984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:20,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:20,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:15:20,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767692823] [2021-06-05 22:15:20,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:15:20,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:15:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:20,947 INFO L87 Difference]: Start difference. First operand 582 states and 1872 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:21,503 INFO L93 Difference]: Finished difference Result 890 states and 2755 transitions. [2021-06-05 22:15:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:15:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:21,504 INFO L225 Difference]: With dead ends: 890 [2021-06-05 22:15:21,504 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 22:15:21,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 22:15:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 590. [2021-06-05 22:15:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.235993208828523) internal successors, (1906), 589 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1906 transitions. [2021-06-05 22:15:21,511 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1906 transitions. Word has length 23 [2021-06-05 22:15:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:21,511 INFO L482 AbstractCegarLoop]: Abstraction has 590 states and 1906 transitions. [2021-06-05 22:15:21,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1906 transitions. [2021-06-05 22:15:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:21,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:21,512 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:21,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6066 [2021-06-05 22:15:21,712 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash -883156757, now seen corresponding path program 89 times [2021-06-05 22:15:21,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:21,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378329474] [2021-06-05 22:15:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:21,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378329474] [2021-06-05 22:15:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378329474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089359740] [2021-06-05 22:15:21,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:21,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:21,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:21,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:21,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:22,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089359740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:22,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:22,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:15:22,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321744731] [2021-06-05 22:15:22,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:15:22,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:22,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:15:22,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:22,118 INFO L87 Difference]: Start difference. First operand 590 states and 1906 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:24,447 INFO L93 Difference]: Finished difference Result 1408 states and 4252 transitions. [2021-06-05 22:15:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:15:24,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:24,449 INFO L225 Difference]: With dead ends: 1408 [2021-06-05 22:15:24,449 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 22:15:24,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1641.6ms TimeCoverageRelationStatistics Valid=335, Invalid=3325, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:15:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 22:15:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 659. [2021-06-05 22:15:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 3.2872340425531914) internal successors, (2163), 658 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2163 transitions. [2021-06-05 22:15:24,457 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2163 transitions. Word has length 23 [2021-06-05 22:15:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:24,457 INFO L482 AbstractCegarLoop]: Abstraction has 659 states and 2163 transitions. [2021-06-05 22:15:24,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2163 transitions. [2021-06-05 22:15:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:24,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:24,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:24,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6284,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:24,658 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash 114891947, now seen corresponding path program 90 times [2021-06-05 22:15:24,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:24,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48712820] [2021-06-05 22:15:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:24,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:24,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48712820] [2021-06-05 22:15:24,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48712820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:24,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195059728] [2021-06-05 22:15:24,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:24,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:24,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:24,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:24,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:24,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:24,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:24,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:24,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:24,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:24,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:24,962 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:24,979 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:24,982 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:24,986 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:24,989 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:24,993 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:24,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:24,995 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:25,084 INFO L628 ElimStorePlain]: treesize reduction 33, result has 79.2 percent of original size [2021-06-05 22:15:25,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-06-05 22:15:25,087 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:465, output treesize:126 [2021-06-05 22:15:26,367 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 109 [2021-06-05 22:15:26,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:15:26,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:26,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:26,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:15:26,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:15:26,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:26,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:15:26,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,852 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2021-06-05 22:15:26,852 INFO L628 ElimStorePlain]: treesize reduction 764, result has 14.0 percent of original size [2021-06-05 22:15:26,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:26,856 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:26,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:26,899 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:26,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:26,941 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:26,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:26,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:26,980 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:27,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:27,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:27,020 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:1041, output treesize:36 [2021-06-05 22:15:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:27,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195059728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:27,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:27,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:15:27,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722304893] [2021-06-05 22:15:27,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:15:27,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:15:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:27,121 INFO L87 Difference]: Start difference. First operand 659 states and 2163 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:28,037 INFO L93 Difference]: Finished difference Result 1062 states and 3330 transitions. [2021-06-05 22:15:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:15:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:28,039 INFO L225 Difference]: With dead ends: 1062 [2021-06-05 22:15:28,039 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 22:15:28,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 957.6ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:15:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 22:15:28,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 671. [2021-06-05 22:15:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.301492537313433) internal successors, (2212), 670 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2212 transitions. [2021-06-05 22:15:28,047 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2212 transitions. Word has length 23 [2021-06-05 22:15:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:28,047 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 2212 transitions. [2021-06-05 22:15:28,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2212 transitions. [2021-06-05 22:15:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:28,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:28,048 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:28,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6297,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:28,261 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1409725143, now seen corresponding path program 91 times [2021-06-05 22:15:28,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:28,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174894651] [2021-06-05 22:15:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:28,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:28,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174894651] [2021-06-05 22:15:28,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174894651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:28,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044704047] [2021-06-05 22:15:28,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:28,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:28,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044704047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:28,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:28,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:15:28,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576090405] [2021-06-05 22:15:28,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:28,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:28,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:28,762 INFO L87 Difference]: Start difference. First operand 671 states and 2212 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:29,907 INFO L93 Difference]: Finished difference Result 940 states and 2968 transitions. [2021-06-05 22:15:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:15:29,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:29,909 INFO L225 Difference]: With dead ends: 940 [2021-06-05 22:15:29,909 INFO L226 Difference]: Without dead ends: 862 [2021-06-05 22:15:29,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:15:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-06-05 22:15:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 671. [2021-06-05 22:15:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.301492537313433) internal successors, (2212), 670 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2212 transitions. [2021-06-05 22:15:29,916 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2212 transitions. Word has length 23 [2021-06-05 22:15:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:29,916 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 2212 transitions. [2021-06-05 22:15:29,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2212 transitions. [2021-06-05 22:15:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:29,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:29,917 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:30,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6539 [2021-06-05 22:15:30,134 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:30,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1285103815, now seen corresponding path program 92 times [2021-06-05 22:15:30,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:30,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139829081] [2021-06-05 22:15:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:30,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:30,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139829081] [2021-06-05 22:15:30,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139829081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:30,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963131301] [2021-06-05 22:15:30,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:30,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:30,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:30,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:30,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:30,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963131301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:30,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:30,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:15:30,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117104472] [2021-06-05 22:15:30,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:15:30,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:15:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:15:30,565 INFO L87 Difference]: Start difference. First operand 671 states and 2212 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:31,473 INFO L93 Difference]: Finished difference Result 1182 states and 3716 transitions. [2021-06-05 22:15:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:15:31,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:31,474 INFO L225 Difference]: With dead ends: 1182 [2021-06-05 22:15:31,474 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 22:15:31,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 836.0ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:15:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 22:15:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 656. [2021-06-05 22:15:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 3.285496183206107) internal successors, (2152), 655 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2152 transitions. [2021-06-05 22:15:31,482 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2152 transitions. Word has length 23 [2021-06-05 22:15:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:31,482 INFO L482 AbstractCegarLoop]: Abstraction has 656 states and 2152 transitions. [2021-06-05 22:15:31,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2152 transitions. [2021-06-05 22:15:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:31,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:31,483 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:31,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6553 [2021-06-05 22:15:31,683 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash -924195449, now seen corresponding path program 93 times [2021-06-05 22:15:31,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:31,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132864889] [2021-06-05 22:15:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:31,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:31,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132864889] [2021-06-05 22:15:31,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132864889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:31,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777793658] [2021-06-05 22:15:31,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:31,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:31,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:32,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777793658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:32,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:32,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:15:32,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525449811] [2021-06-05 22:15:32,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:15:32,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:15:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:15:32,062 INFO L87 Difference]: Start difference. First operand 656 states and 2152 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:32,399 INFO L93 Difference]: Finished difference Result 887 states and 2856 transitions. [2021-06-05 22:15:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:15:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:32,401 INFO L225 Difference]: With dead ends: 887 [2021-06-05 22:15:32,401 INFO L226 Difference]: Without dead ends: 833 [2021-06-05 22:15:32,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:15:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-06-05 22:15:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 643. [2021-06-05 22:15:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.2725856697819315) internal successors, (2101), 642 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2101 transitions. [2021-06-05 22:15:32,408 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2101 transitions. Word has length 23 [2021-06-05 22:15:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:32,408 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 2101 transitions. [2021-06-05 22:15:32,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2101 transitions. [2021-06-05 22:15:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:32,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:32,409 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:32,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6567,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:32,629 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1918877981, now seen corresponding path program 94 times [2021-06-05 22:15:32,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:32,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647616828] [2021-06-05 22:15:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:32,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:32,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647616828] [2021-06-05 22:15:32,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647616828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:32,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085185053] [2021-06-05 22:15:32,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:32,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:32,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:32,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:32,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:32,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:32,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:32,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:32,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,929 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:32,933 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,936 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,940 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:32,944 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,947 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,951 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,954 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,957 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,961 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,964 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,975 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:32,979 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:32,983 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,988 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,991 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,995 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:32,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:32,999 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,002 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,099 INFO L628 ElimStorePlain]: treesize reduction 92, result has 54.2 percent of original size [2021-06-05 22:15:33,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:15:33,102 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 2 variables, input treesize:968, output treesize:101 [2021-06-05 22:15:33,616 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_110, char_at_5], 1=[char_at_1]} [2021-06-05 22:15:33,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:33,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:33,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,648 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,651 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,656 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:33,661 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:33,665 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:33,670 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,675 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:33,680 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,685 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,688 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,692 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,696 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,700 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,704 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,708 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,712 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,716 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,720 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,724 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:33,728 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:33,733 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,736 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,740 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,744 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,748 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,751 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,755 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,758 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,762 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,765 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,769 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,777 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,781 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,786 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,790 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,896 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-05 22:15:33,897 INFO L628 ElimStorePlain]: treesize reduction 67, result has 68.1 percent of original size [2021-06-05 22:15:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:33,901 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:33,905 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:33,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:33,955 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:33,958 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:33,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:33,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:33,961 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:34,006 INFO L628 ElimStorePlain]: treesize reduction 18, result has 78.0 percent of original size [2021-06-05 22:15:34,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:34,008 INFO L247 ElimStorePlain]: Needed 47 recursive calls to eliminate 5 variables, input treesize:1673, output treesize:34 [2021-06-05 22:15:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:34,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085185053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:34,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:34,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:15:34,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754288354] [2021-06-05 22:15:34,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:15:34,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:34,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:15:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:34,071 INFO L87 Difference]: Start difference. First operand 643 states and 2101 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:34,531 INFO L93 Difference]: Finished difference Result 841 states and 2663 transitions. [2021-06-05 22:15:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:15:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:34,533 INFO L225 Difference]: With dead ends: 841 [2021-06-05 22:15:34,533 INFO L226 Difference]: Without dead ends: 802 [2021-06-05 22:15:34,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-05 22:15:34,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 662. [2021-06-05 22:15:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.2829046898638428) internal successors, (2170), 661 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2170 transitions. [2021-06-05 22:15:34,540 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2170 transitions. Word has length 23 [2021-06-05 22:15:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:34,540 INFO L482 AbstractCegarLoop]: Abstraction has 662 states and 2170 transitions. [2021-06-05 22:15:34,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2170 transitions. [2021-06-05 22:15:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:34,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:34,541 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:34,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6580 [2021-06-05 22:15:34,746 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:34,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1090336119, now seen corresponding path program 95 times [2021-06-05 22:15:34,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:34,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451172826] [2021-06-05 22:15:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:35,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:35,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451172826] [2021-06-05 22:15:35,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451172826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:35,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634684384] [2021-06-05 22:15:35,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:35,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:35,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:35,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:35,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:35,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:35,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:35,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:35,331 INFO L628 ElimStorePlain]: treesize reduction 19, result has 60.4 percent of original size [2021-06-05 22:15:35,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:35,332 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:69, output treesize:29 [2021-06-05 22:15:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:35,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634684384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:35,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:35,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:15:35,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972137399] [2021-06-05 22:15:35,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:35,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:35,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:35,506 INFO L87 Difference]: Start difference. First operand 662 states and 2170 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:36,494 INFO L93 Difference]: Finished difference Result 886 states and 2788 transitions. [2021-06-05 22:15:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:15:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:36,495 INFO L225 Difference]: With dead ends: 886 [2021-06-05 22:15:36,495 INFO L226 Difference]: Without dead ends: 832 [2021-06-05 22:15:36,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1105.7ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:15:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-06-05 22:15:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 662. [2021-06-05 22:15:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.2829046898638428) internal successors, (2170), 661 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2170 transitions. [2021-06-05 22:15:36,502 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2170 transitions. Word has length 23 [2021-06-05 22:15:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:36,503 INFO L482 AbstractCegarLoop]: Abstraction has 662 states and 2170 transitions. [2021-06-05 22:15:36,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2170 transitions. [2021-06-05 22:15:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:36,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:36,503 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:36,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6693,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:36,704 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash 634583489, now seen corresponding path program 96 times [2021-06-05 22:15:36,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:36,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235780217] [2021-06-05 22:15:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:36,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:36,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235780217] [2021-06-05 22:15:36,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235780217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:36,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913921175] [2021-06-05 22:15:36,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:36,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:36,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:36,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:36,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:36,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:36,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:36,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:37,088 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-06-05 22:15:37,088 INFO L628 ElimStorePlain]: treesize reduction 101, result has 64.8 percent of original size [2021-06-05 22:15:37,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:37,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:37,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:37,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:37,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:37,097 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:37,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:37,100 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:37,153 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.7 percent of original size [2021-06-05 22:15:37,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:15:37,155 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:323, output treesize:60 [2021-06-05 22:15:38,283 INFO L446 ElimStorePlain]: Different costs {0=[char_at_1], 3=[char_at_5]} [2021-06-05 22:15:38,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:38,315 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:38,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,325 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:38,335 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,340 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:38,346 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,351 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,355 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,359 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,363 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,368 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,372 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,376 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,380 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,385 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:38,389 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,401 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,406 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:38,411 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,415 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,419 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,423 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,427 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:38,432 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,436 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,440 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,444 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,448 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,452 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,456 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,459 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,463 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,467 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,471 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:38,475 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,479 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,482 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,486 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,489 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,493 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,496 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,650 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 22:15:38,650 INFO L628 ElimStorePlain]: treesize reduction 84, result has 70.7 percent of original size [2021-06-05 22:15:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,654 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,658 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:38,661 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,665 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,668 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:38,671 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:38,674 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:38,766 INFO L628 ElimStorePlain]: treesize reduction 22, result has 84.7 percent of original size [2021-06-05 22:15:38,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:15:38,768 INFO L247 ElimStorePlain]: Needed 56 recursive calls to eliminate 5 variables, input treesize:1843, output treesize:35 [2021-06-05 22:15:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:38,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913921175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:38,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:38,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:15:38,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814973410] [2021-06-05 22:15:38,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:15:38,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:15:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:38,840 INFO L87 Difference]: Start difference. First operand 662 states and 2170 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:39,140 INFO L93 Difference]: Finished difference Result 991 states and 3200 transitions. [2021-06-05 22:15:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:39,142 INFO L225 Difference]: With dead ends: 991 [2021-06-05 22:15:39,142 INFO L226 Difference]: Without dead ends: 944 [2021-06-05 22:15:39,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-06-05 22:15:39,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 696. [2021-06-05 22:15:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 3.274820143884892) internal successors, (2276), 695 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 2276 transitions. [2021-06-05 22:15:39,149 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 2276 transitions. Word has length 23 [2021-06-05 22:15:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:39,149 INFO L482 AbstractCegarLoop]: Abstraction has 696 states and 2276 transitions. [2021-06-05 22:15:39,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 2276 transitions. [2021-06-05 22:15:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:39,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:39,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:39,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6732,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:39,357 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1653613091, now seen corresponding path program 97 times [2021-06-05 22:15:39,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:39,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573122033] [2021-06-05 22:15:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:39,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:39,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573122033] [2021-06-05 22:15:39,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573122033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:39,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132111427] [2021-06-05 22:15:39,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:39,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:39,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:39,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:39,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:39,793 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:39,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:39,806 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:39,810 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,814 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,818 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:39,822 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:15:39,826 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,830 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,834 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,838 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,842 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,846 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,849 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:39,854 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,858 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:39,862 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,866 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,870 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,873 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:39,878 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,882 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,886 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:39,890 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,894 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,898 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,902 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,906 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:39,910 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,914 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,918 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,922 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,925 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,928 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,932 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,935 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,939 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,942 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,945 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,949 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,952 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,955 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,958 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:39,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:39,961 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:40,056 INFO L628 ElimStorePlain]: treesize reduction 81, result has 61.4 percent of original size [2021-06-05 22:15:40,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:40,060 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:40,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:40,063 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:40,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:40,066 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:40,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:40,069 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:40,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:40,071 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:40,123 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-06-05 22:15:40,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:40,125 INFO L247 ElimStorePlain]: Needed 55 recursive calls to eliminate 3 variables, input treesize:1705, output treesize:35 [2021-06-05 22:15:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:40,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132111427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:40,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:40,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:15:40,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674925899] [2021-06-05 22:15:40,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:15:40,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:40,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:15:40,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:40,223 INFO L87 Difference]: Start difference. First operand 696 states and 2276 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:40,544 INFO L93 Difference]: Finished difference Result 1001 states and 3224 transitions. [2021-06-05 22:15:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:15:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:40,546 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:15:40,546 INFO L226 Difference]: Without dead ends: 947 [2021-06-05 22:15:40,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:15:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-05 22:15:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 702. [2021-06-05 22:15:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.276747503566334) internal successors, (2297), 701 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2297 transitions. [2021-06-05 22:15:40,553 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2297 transitions. Word has length 23 [2021-06-05 22:15:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:40,553 INFO L482 AbstractCegarLoop]: Abstraction has 702 states and 2297 transitions. [2021-06-05 22:15:40,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2297 transitions. [2021-06-05 22:15:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:40,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:40,554 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:40,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6906 [2021-06-05 22:15:40,755 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:40,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1189460339, now seen corresponding path program 98 times [2021-06-05 22:15:40,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:40,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81559570] [2021-06-05 22:15:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:40,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:40,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81559570] [2021-06-05 22:15:40,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81559570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:40,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148063743] [2021-06-05 22:15:40,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:40,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:40,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:41,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148063743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:41,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:41,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:15:41,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114964279] [2021-06-05 22:15:41,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:15:41,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:41,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:15:41,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:41,166 INFO L87 Difference]: Start difference. First operand 702 states and 2297 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:42,375 INFO L93 Difference]: Finished difference Result 1104 states and 3393 transitions. [2021-06-05 22:15:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:15:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:42,377 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 22:15:42,377 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 22:15:42,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 875.7ms TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:15:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 22:15:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 763. [2021-06-05 22:15:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.304461942257218) internal successors, (2518), 762 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2518 transitions. [2021-06-05 22:15:42,386 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2518 transitions. Word has length 23 [2021-06-05 22:15:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:42,386 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2518 transitions. [2021-06-05 22:15:42,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2518 transitions. [2021-06-05 22:15:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:42,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:42,387 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:42,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6979 [2021-06-05 22:15:42,587 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1286302003, now seen corresponding path program 99 times [2021-06-05 22:15:42,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:42,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431164613] [2021-06-05 22:15:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:42,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:42,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431164613] [2021-06-05 22:15:42,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431164613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:42,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335515301] [2021-06-05 22:15:42,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:42,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:15:42,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:42,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:43,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:15:43,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:43,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:43,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:43,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:15:43,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:43,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:43,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:43,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:43,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:43,079 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 22:15:43,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:15:43,080 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:101 [2021-06-05 22:15:43,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:15:43,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:43,167 INFO L628 ElimStorePlain]: treesize reduction 9, result has 62.5 percent of original size [2021-06-05 22:15:43,167 INFO L518 ElimStorePlain]: Eliminatee index_of_4 vanished before elimination [2021-06-05 22:15:43,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:43,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-06-05 22:15:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:43,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335515301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:43,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:43,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 22:15:43,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409179590] [2021-06-05 22:15:43,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:15:43,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:43,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:15:43,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:15:43,196 INFO L87 Difference]: Start difference. First operand 763 states and 2518 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:45,148 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2021-06-05 22:15:46,378 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 22:15:46,552 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 22:15:46,733 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 22:15:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:46,754 INFO L93 Difference]: Finished difference Result 1498 states and 4529 transitions. [2021-06-05 22:15:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:15:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:46,756 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 22:15:46,756 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 22:15:46,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3179.9ms TimeCoverageRelationStatistics Valid=507, Invalid=4049, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:15:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 22:15:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 809. [2021-06-05 22:15:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.332920792079208) internal successors, (2693), 808 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2693 transitions. [2021-06-05 22:15:46,766 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2693 transitions. Word has length 23 [2021-06-05 22:15:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:46,766 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2693 transitions. [2021-06-05 22:15:46,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2693 transitions. [2021-06-05 22:15:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:46,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:46,767 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:46,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6991 [2021-06-05 22:15:46,968 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:46,968 INFO L82 PathProgramCache]: Analyzing trace with hash 435243955, now seen corresponding path program 100 times [2021-06-05 22:15:46,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:46,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64926896] [2021-06-05 22:15:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:47,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64926896] [2021-06-05 22:15:47,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64926896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019390237] [2021-06-05 22:15:47,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:47,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:47,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:47,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019390237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:47,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:47,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:15:47,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33021906] [2021-06-05 22:15:47,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:47,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:47,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:47,513 INFO L87 Difference]: Start difference. First operand 809 states and 2693 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:49,775 INFO L93 Difference]: Finished difference Result 1196 states and 3751 transitions. [2021-06-05 22:15:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:15:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:49,777 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 22:15:49,777 INFO L226 Difference]: Without dead ends: 1103 [2021-06-05 22:15:49,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2067.7ms TimeCoverageRelationStatistics Valid=368, Invalid=2182, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:15:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-05 22:15:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 788. [2021-06-05 22:15:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.2947903430749683) internal successors, (2593), 787 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2593 transitions. [2021-06-05 22:15:49,787 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2593 transitions. Word has length 23 [2021-06-05 22:15:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:49,787 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2593 transitions. [2021-06-05 22:15:49,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2593 transitions. [2021-06-05 22:15:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:49,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:49,788 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:49,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7015 [2021-06-05 22:15:49,988 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:49,988 INFO L82 PathProgramCache]: Analyzing trace with hash -465769423, now seen corresponding path program 101 times [2021-06-05 22:15:49,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:49,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722827505] [2021-06-05 22:15:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:50,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722827505] [2021-06-05 22:15:50,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722827505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:50,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043099999] [2021-06-05 22:15:50,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:50,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:15:50,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:50,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:50,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:50,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043099999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:50,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:50,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:15:50,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585776659] [2021-06-05 22:15:50,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:15:50,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:15:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:50,328 INFO L87 Difference]: Start difference. First operand 788 states and 2593 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:51,849 INFO L93 Difference]: Finished difference Result 1455 states and 4605 transitions. [2021-06-05 22:15:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:15:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:51,851 INFO L225 Difference]: With dead ends: 1455 [2021-06-05 22:15:51,851 INFO L226 Difference]: Without dead ends: 1307 [2021-06-05 22:15:51,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 882.0ms TimeCoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:15:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-05 22:15:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 815. [2021-06-05 22:15:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.2997542997542997) internal successors, (2686), 814 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2686 transitions. [2021-06-05 22:15:51,862 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2686 transitions. Word has length 23 [2021-06-05 22:15:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:51,862 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2686 transitions. [2021-06-05 22:15:51,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2686 transitions. [2021-06-05 22:15:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:51,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:51,863 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:52,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7023 [2021-06-05 22:15:52,073 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash -69978741, now seen corresponding path program 102 times [2021-06-05 22:15:52,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:52,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816774279] [2021-06-05 22:15:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:52,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816774279] [2021-06-05 22:15:52,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816774279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396631920] [2021-06-05 22:15:52,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:52,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:15:52,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:52,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:52,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:52,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:52,430 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-06-05 22:15:52,430 INFO L628 ElimStorePlain]: treesize reduction 89, result has 68.9 percent of original size [2021-06-05 22:15:52,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:52,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:52,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:52,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:52,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:52,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:52,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:52,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:52,509 INFO L628 ElimStorePlain]: treesize reduction 46, result has 66.4 percent of original size [2021-06-05 22:15:52,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:52,512 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:52,552 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.7 percent of original size [2021-06-05 22:15:52,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-06-05 22:15:52,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:15:52,554 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:291, output treesize:51 [2021-06-05 22:15:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:52,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396631920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:52,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:52,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:15:52,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291049269] [2021-06-05 22:15:52,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:15:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:15:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:52,645 INFO L87 Difference]: Start difference. First operand 815 states and 2686 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:52,812 INFO L93 Difference]: Finished difference Result 1030 states and 3327 transitions. [2021-06-05 22:15:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:15:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:52,814 INFO L225 Difference]: With dead ends: 1030 [2021-06-05 22:15:52,814 INFO L226 Difference]: Without dead ends: 991 [2021-06-05 22:15:52,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-06-05 22:15:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 828. [2021-06-05 22:15:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.2998790810157193) internal successors, (2729), 827 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2729 transitions. [2021-06-05 22:15:52,822 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2729 transitions. Word has length 23 [2021-06-05 22:15:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:52,822 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2729 transitions. [2021-06-05 22:15:52,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2729 transitions. [2021-06-05 22:15:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:52,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:52,823 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:53,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7034 [2021-06-05 22:15:53,030 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1505850101, now seen corresponding path program 103 times [2021-06-05 22:15:53,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:53,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655084069] [2021-06-05 22:15:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:53,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:53,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655084069] [2021-06-05 22:15:53,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655084069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:53,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868692816] [2021-06-05 22:15:53,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:15:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868692816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:53,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:53,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:15:53,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019257080] [2021-06-05 22:15:53,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:15:53,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:15:53,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:15:53,445 INFO L87 Difference]: Start difference. First operand 828 states and 2729 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:54,941 INFO L93 Difference]: Finished difference Result 1472 states and 4659 transitions. [2021-06-05 22:15:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:15:54,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:54,943 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 22:15:54,943 INFO L226 Difference]: Without dead ends: 1345 [2021-06-05 22:15:54,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1086.4ms TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:15:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-06-05 22:15:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 881. [2021-06-05 22:15:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.305681818181818) internal successors, (2909), 880 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2909 transitions. [2021-06-05 22:15:54,954 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2909 transitions. Word has length 23 [2021-06-05 22:15:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:54,954 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2909 transitions. [2021-06-05 22:15:54,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2909 transitions. [2021-06-05 22:15:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:54,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:54,955 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:55,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7055,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:55,156 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:55,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1930412499, now seen corresponding path program 104 times [2021-06-05 22:15:55,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:55,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951322347] [2021-06-05 22:15:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:55,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:55,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951322347] [2021-06-05 22:15:55,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951322347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:55,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4675340] [2021-06-05 22:15:55,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:55,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:55,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:55,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:55,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:55,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:55,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:55,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:55,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,460 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:55,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,468 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,471 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,475 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,478 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,481 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,485 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,488 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,491 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,494 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,497 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,500 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:55,504 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,507 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,510 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,513 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,516 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,518 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:55,521 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:55,605 INFO L628 ElimStorePlain]: treesize reduction 66, result has 62.3 percent of original size [2021-06-05 22:15:55,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:15:55,608 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:942, output treesize:101 [2021-06-05 22:15:56,751 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_122, v_prenex_123, v_prenex_124, v_prenex_125, v_prenex_126], 6=[char_at_1]} [2021-06-05 22:15:56,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:56,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:56,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:56,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:56,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:56,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:56,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:56,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:56,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:56,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:56,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:56,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:56,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:56,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:56,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:56,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,361 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 79 [2021-06-05 22:15:57,362 INFO L628 ElimStorePlain]: treesize reduction 788, result has 44.3 percent of original size [2021-06-05 22:15:57,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:57,367 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:57,372 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:57,376 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:57,381 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:57,385 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:57,390 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:57,394 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:57,398 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,681 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 22:15:57,682 INFO L628 ElimStorePlain]: treesize reduction 120, result has 74.9 percent of original size [2021-06-05 22:15:57,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:57,687 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:57,691 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,890 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 22:15:57,891 INFO L628 ElimStorePlain]: treesize reduction 80, result has 77.1 percent of original size [2021-06-05 22:15:57,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_125 vanished before elimination [2021-06-05 22:15:57,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:57,895 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:57,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:57,899 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:58,042 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 22:15:58,043 INFO L628 ElimStorePlain]: treesize reduction 70, result has 71.4 percent of original size [2021-06-05 22:15:58,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:58,048 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:58,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:58,052 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:58,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:58,056 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:58,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:58,059 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:58,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:58,063 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:58,143 INFO L628 ElimStorePlain]: treesize reduction 22, result has 82.3 percent of original size [2021-06-05 22:15:58,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:58,145 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 10 variables, input treesize:1685, output treesize:37 [2021-06-05 22:15:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:58,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4675340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:58,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:58,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:15:58,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28503256] [2021-06-05 22:15:58,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:15:58,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:58,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:15:58,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:58,239 INFO L87 Difference]: Start difference. First operand 881 states and 2909 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,479 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 22:15:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:58,642 INFO L93 Difference]: Finished difference Result 1161 states and 3735 transitions. [2021-06-05 22:15:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:15:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:15:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:58,644 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 22:15:58,644 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 22:15:58,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:15:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 22:15:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 866. [2021-06-05 22:15:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.298265895953757) internal successors, (2853), 865 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2853 transitions. [2021-06-05 22:15:58,653 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2853 transitions. Word has length 23 [2021-06-05 22:15:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:58,654 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2853 transitions. [2021-06-05 22:15:58,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2853 transitions. [2021-06-05 22:15:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:15:58,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:58,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:58,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7068 [2021-06-05 22:15:58,855 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1994451001, now seen corresponding path program 105 times [2021-06-05 22:15:58,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:58,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821877594] [2021-06-05 22:15:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:59,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:59,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821877594] [2021-06-05 22:15:59,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821877594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:59,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538633528] [2021-06-05 22:15:59,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:59,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:15:59,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:15:59,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:59,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:59,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:59,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:59,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:15:59,214 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:15:59,217 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,220 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,223 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,226 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,229 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,231 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:59,234 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:59,304 INFO L628 ElimStorePlain]: treesize reduction 29, result has 77.0 percent of original size [2021-06-05 22:15:59,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:15:59,308 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:465, output treesize:89 [2021-06-05 22:15:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:15:59,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538633528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:59,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:59,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:15:59,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704448492] [2021-06-05 22:15:59,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:15:59,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:15:59,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:59,656 INFO L87 Difference]: Start difference. First operand 866 states and 2853 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:59,931 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 22:16:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:00,204 INFO L93 Difference]: Finished difference Result 1150 states and 3667 transitions. [2021-06-05 22:16:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:16:00,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:16:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:00,206 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 22:16:00,206 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:16:00,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 642.9ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:16:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:16:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 882. [2021-06-05 22:16:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.3144154370034054) internal successors, (2920), 881 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2920 transitions. [2021-06-05 22:16:00,215 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2920 transitions. Word has length 23 [2021-06-05 22:16:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:00,215 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2920 transitions. [2021-06-05 22:16:00,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2920 transitions. [2021-06-05 22:16:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:16:00,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:00,216 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:00,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7367 [2021-06-05 22:16:00,432 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1909444947, now seen corresponding path program 106 times [2021-06-05 22:16:00,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:00,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469920592] [2021-06-05 22:16:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:00,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:00,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469920592] [2021-06-05 22:16:00,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469920592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:00,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750337469] [2021-06-05 22:16:00,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:00,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:00,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:16:00,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:16:00,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750337469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:00,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:00,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:16:00,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908986825] [2021-06-05 22:16:00,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:16:00,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:00,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:16:00,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:16:00,792 INFO L87 Difference]: Start difference. First operand 882 states and 2920 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:02,252 INFO L93 Difference]: Finished difference Result 1500 states and 4756 transitions. [2021-06-05 22:16:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:16:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:16:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:02,254 INFO L225 Difference]: With dead ends: 1500 [2021-06-05 22:16:02,254 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 22:16:02,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 965.6ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:16:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 22:16:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 900. [2021-06-05 22:16:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.3214682981090102) internal successors, (2986), 899 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2986 transitions. [2021-06-05 22:16:02,265 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2986 transitions. Word has length 23 [2021-06-05 22:16:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:02,265 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2986 transitions. [2021-06-05 22:16:02,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2986 transitions. [2021-06-05 22:16:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:16:02,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:02,266 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:02,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7431 [2021-06-05 22:16:02,466 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1607181827, now seen corresponding path program 107 times [2021-06-05 22:16:02,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:02,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597841760] [2021-06-05 22:16:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:02,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:02,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597841760] [2021-06-05 22:16:02,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597841760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:02,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212303670] [2021-06-05 22:16:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:02,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:02,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:16:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:02,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:02,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:02,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:02,746 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,749 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,752 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,756 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,759 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,762 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:02,765 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,768 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,772 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,775 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,778 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,781 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,785 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,788 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,790 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,793 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,796 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,799 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:02,802 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,805 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,807 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:02,810 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:02,913 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-06-05 22:16:02,913 INFO L628 ElimStorePlain]: treesize reduction 34, result has 76.2 percent of original size [2021-06-05 22:16:02,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:16:02,916 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 2 variables, input treesize:963, output treesize:101 [2021-06-05 22:16:03,413 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_131, char_at_9], 1=[char_at_5]} [2021-06-05 22:16:03,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:03,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:03,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:03,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:03,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:03,433 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:03,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,600 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 22:16:03,601 INFO L628 ElimStorePlain]: treesize reduction 384, result has 35.9 percent of original size [2021-06-05 22:16:03,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:03,604 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:03,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:03,610 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:03,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,694 INFO L628 ElimStorePlain]: treesize reduction 50, result has 66.9 percent of original size [2021-06-05 22:16:03,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:03,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:03,701 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:03,704 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:03,739 INFO L628 ElimStorePlain]: treesize reduction 20, result has 67.7 percent of original size [2021-06-05 22:16:03,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:03,740 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:753, output treesize:20 [2021-06-05 22:16:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:03,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212303670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:03,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:03,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:16:03,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719877576] [2021-06-05 22:16:03,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:16:03,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:03,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:16:03,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:03,787 INFO L87 Difference]: Start difference. First operand 900 states and 2986 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:04,072 INFO L93 Difference]: Finished difference Result 1088 states and 3513 transitions. [2021-06-05 22:16:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:04,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:16:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:04,073 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 22:16:04,073 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 22:16:04,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 22:16:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 897. [2021-06-05 22:16:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.3247767857142856) internal successors, (2979), 896 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2979 transitions. [2021-06-05 22:16:04,083 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2979 transitions. Word has length 23 [2021-06-05 22:16:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:04,083 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2979 transitions. [2021-06-05 22:16:04,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2979 transitions. [2021-06-05 22:16:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:16:04,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:04,084 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:04,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7442 [2021-06-05 22:16:04,284 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash -580235171, now seen corresponding path program 108 times [2021-06-05 22:16:04,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:04,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523977920] [2021-06-05 22:16:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:04,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:04,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523977920] [2021-06-05 22:16:04,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523977920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:04,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491953609] [2021-06-05 22:16:04,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:04,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:04,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:16:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:04,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491953609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:04,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:04,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:16:04,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774161542] [2021-06-05 22:16:04,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:04,835 INFO L87 Difference]: Start difference. First operand 897 states and 2979 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:05,954 INFO L93 Difference]: Finished difference Result 1292 states and 4147 transitions. [2021-06-05 22:16:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:16:05,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:16:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:05,956 INFO L225 Difference]: With dead ends: 1292 [2021-06-05 22:16:05,956 INFO L226 Difference]: Without dead ends: 1195 [2021-06-05 22:16:05,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1016.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:16:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-05 22:16:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 898. [2021-06-05 22:16:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.3244147157190636) internal successors, (2982), 897 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2982 transitions. [2021-06-05 22:16:05,966 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2982 transitions. Word has length 23 [2021-06-05 22:16:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:05,966 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 2982 transitions. [2021-06-05 22:16:05,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2982 transitions. [2021-06-05 22:16:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:16:05,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:05,967 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:06,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7565 [2021-06-05 22:16:06,173 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash 106107917, now seen corresponding path program 109 times [2021-06-05 22:16:06,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:06,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351958161] [2021-06-05 22:16:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:16:06,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:06,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351958161] [2021-06-05 22:16:06,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351958161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:06,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334384380] [2021-06-05 22:16:06,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:06,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:16:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:42,940 WARN L205 SmtUtils]: Spent 36.60 s on a formula simplification. DAG size of input: 124 DAG size of output: 58 [2021-06-05 22:16:43,087 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 22:16:43,617 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 22:16:44,082 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 22:16:44,223 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 44 [2021-06-05 22:16:44,905 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 22:16:57,511 WARN L205 SmtUtils]: Spent 12.55 s on a formula simplification. DAG size of input: 56 DAG size of output: 58 [2021-06-05 22:16:57,838 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 22:16:58,077 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 53 [2021-06-05 22:16:58,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:16:58,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:16:58,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:58,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,104 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:58,115 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:58,119 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,123 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,126 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,129 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,133 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,136 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,139 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:58,143 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,147 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,150 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:58,154 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,157 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,160 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:58,164 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,167 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,170 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,173 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,177 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,179 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,182 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,186 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,188 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,191 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,198 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,201 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,204 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,207 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,209 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,212 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,214 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,285 INFO L628 ElimStorePlain]: treesize reduction 54, result has 64.2 percent of original size [2021-06-05 22:16:58,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:16:58,288 INFO L247 ElimStorePlain]: Needed 38 recursive calls to eliminate 2 variables, input treesize:1285, output treesize:89 [2021-06-05 22:16:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:16:59,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:16:59,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:16:59,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:16:59,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:59,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:59,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,246 INFO L628 ElimStorePlain]: treesize reduction 364, result has 19.3 percent of original size [2021-06-05 22:16:59,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:16:59,250 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:59,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:16:59,281 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:59,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:16:59,307 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:612, output treesize:37 [2021-06-05 22:16:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:16:59,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334384380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:59,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:59,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:16:59,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337676462] [2021-06-05 22:16:59,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:16:59,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:16:59,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:59,409 INFO L87 Difference]: Start difference. First operand 898 states and 2982 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:00,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:00,003 INFO L93 Difference]: Finished difference Result 1212 states and 3904 transitions. [2021-06-05 22:17:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:00,005 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 22:17:00,005 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 22:17:00,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 650.7ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:17:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 22:17:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 875. [2021-06-05 22:17:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.303203661327231) internal successors, (2887), 874 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2887 transitions. [2021-06-05 22:17:00,015 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2887 transitions. Word has length 23 [2021-06-05 22:17:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:00,015 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2887 transitions. [2021-06-05 22:17:00,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2887 transitions. [2021-06-05 22:17:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:00,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:00,016 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:00,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7576 [2021-06-05 22:17:00,216 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:00,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1487733747, now seen corresponding path program 110 times [2021-06-05 22:17:00,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:00,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920181881] [2021-06-05 22:17:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:00,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:00,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920181881] [2021-06-05 22:17:00,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920181881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:00,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817341653] [2021-06-05 22:17:00,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:00,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:00,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:00,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:00,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817341653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:00,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:00,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:17:00,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401415151] [2021-06-05 22:17:00,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:17:00,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:00,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:17:00,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:00,548 INFO L87 Difference]: Start difference. First operand 875 states and 2887 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:02,635 INFO L93 Difference]: Finished difference Result 1587 states and 4874 transitions. [2021-06-05 22:17:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:17:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:02,638 INFO L225 Difference]: With dead ends: 1587 [2021-06-05 22:17:02,638 INFO L226 Difference]: Without dead ends: 1419 [2021-06-05 22:17:02,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1629.7ms TimeCoverageRelationStatistics Valid=358, Invalid=2948, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:17:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-05 22:17:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 929. [2021-06-05 22:17:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.3017241379310347) internal successors, (3064), 928 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3064 transitions. [2021-06-05 22:17:02,648 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3064 transitions. Word has length 23 [2021-06-05 22:17:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:02,648 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3064 transitions. [2021-06-05 22:17:02,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3064 transitions. [2021-06-05 22:17:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:02,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:02,649 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:02,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7744 [2021-06-05 22:17:02,850 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:02,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:02,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1364988877, now seen corresponding path program 111 times [2021-06-05 22:17:02,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:02,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375953823] [2021-06-05 22:17:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:02,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:02,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375953823] [2021-06-05 22:17:02,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375953823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:02,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667549413] [2021-06-05 22:17:02,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:03,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:03,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:17:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:03,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:03,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:03,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:03,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:03,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,143 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:03,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,149 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,152 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,155 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,157 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,160 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:03,162 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:03,222 INFO L628 ElimStorePlain]: treesize reduction 26, result has 76.6 percent of original size [2021-06-05 22:17:03,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:17:03,224 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:423, output treesize:77 [2021-06-05 22:17:04,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:04,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:04,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:04,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:04,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:04,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,379 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-05 22:17:04,379 INFO L628 ElimStorePlain]: treesize reduction 319, result has 32.4 percent of original size [2021-06-05 22:17:04,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:04,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:04,387 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:04,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:04,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:17:04,510 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:590, output treesize:68 [2021-06-05 22:17:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:04,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667549413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:04,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:04,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:17:04,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174441745] [2021-06-05 22:17:04,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:17:04,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:17:04,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:04,668 INFO L87 Difference]: Start difference. First operand 929 states and 3064 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:05,384 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 22:17:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:05,738 INFO L93 Difference]: Finished difference Result 1577 states and 4962 transitions. [2021-06-05 22:17:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:17:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:05,740 INFO L225 Difference]: With dead ends: 1577 [2021-06-05 22:17:05,740 INFO L226 Difference]: Without dead ends: 1487 [2021-06-05 22:17:05,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1159.9ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:17:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-05 22:17:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 954. [2021-06-05 22:17:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.3273871983210914) internal successors, (3171), 953 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3171 transitions. [2021-06-05 22:17:05,752 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3171 transitions. Word has length 23 [2021-06-05 22:17:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:05,752 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3171 transitions. [2021-06-05 22:17:05,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3171 transitions. [2021-06-05 22:17:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:05,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:05,753 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:05,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7756,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:05,953 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash 638203473, now seen corresponding path program 112 times [2021-06-05 22:17:05,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:05,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137281083] [2021-06-05 22:17:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:06,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:06,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137281083] [2021-06-05 22:17:06,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137281083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:06,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722768248] [2021-06-05 22:17:06,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:06,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:06,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:06,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:06,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:06,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:06,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:06,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:06,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,269 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:06,272 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,278 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,281 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,284 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,287 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,290 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,293 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,296 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,299 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,302 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,305 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,308 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:06,311 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,383 INFO L628 ElimStorePlain]: treesize reduction 62, result has 61.0 percent of original size [2021-06-05 22:17:06,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:17:06,386 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 2 variables, input treesize:747, output treesize:89 [2021-06-05 22:17:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 22:17:06,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 22:17:06,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:06,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:06,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,768 INFO L628 ElimStorePlain]: treesize reduction 240, result has 25.0 percent of original size [2021-06-05 22:17:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:06,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:06,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:06,801 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:06,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:06,827 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:440, output treesize:37 [2021-06-05 22:17:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:06,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722768248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:06,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:06,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:17:06,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319951397] [2021-06-05 22:17:06,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:17:06,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:17:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:06,947 INFO L87 Difference]: Start difference. First operand 954 states and 3171 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:07,514 INFO L93 Difference]: Finished difference Result 1349 states and 4376 transitions. [2021-06-05 22:17:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:07,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:07,516 INFO L225 Difference]: With dead ends: 1349 [2021-06-05 22:17:07,516 INFO L226 Difference]: Without dead ends: 1295 [2021-06-05 22:17:07,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:17:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-06-05 22:17:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 916. [2021-06-05 22:17:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.3256830601092897) internal successors, (3043), 915 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3043 transitions. [2021-06-05 22:17:07,526 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3043 transitions. Word has length 23 [2021-06-05 22:17:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:07,526 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3043 transitions. [2021-06-05 22:17:07,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3043 transitions. [2021-06-05 22:17:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:07,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:07,527 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:07,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7970 [2021-06-05 22:17:07,727 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1403744081, now seen corresponding path program 113 times [2021-06-05 22:17:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:07,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172421778] [2021-06-05 22:17:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:08,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:08,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172421778] [2021-06-05 22:17:08,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172421778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:08,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174586730] [2021-06-05 22:17:08,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:08,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:08,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:08,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:17:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:08,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:08,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:08,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,178 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,181 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,188 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:08,192 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,196 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:08,200 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,203 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,206 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:08,211 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,214 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,217 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,221 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,224 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,227 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:08,231 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,234 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,237 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,240 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,243 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:08,247 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:08,251 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,254 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:08,258 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,261 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,264 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:08,268 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,271 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:08,274 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,277 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,280 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,283 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,368 INFO L628 ElimStorePlain]: treesize reduction 90, result has 54.8 percent of original size [2021-06-05 22:17:08,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:17:08,371 INFO L247 ElimStorePlain]: Needed 38 recursive calls to eliminate 2 variables, input treesize:1384, output treesize:101 [2021-06-05 22:17:08,980 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 1=[char_at_5]} [2021-06-05 22:17:08,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:08,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:08,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:08,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:08,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:09,006 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,013 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,017 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:09,021 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,025 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,029 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,033 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,036 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:09,041 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:09,077 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,081 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,085 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,089 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,093 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,097 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,101 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,105 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,109 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,113 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,116 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:09,121 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,124 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,128 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:09,132 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,135 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,257 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 22:17:09,258 INFO L628 ElimStorePlain]: treesize reduction 112, result has 58.4 percent of original size [2021-06-05 22:17:09,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:09,261 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,264 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:09,267 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,270 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:09,273 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,321 INFO L628 ElimStorePlain]: treesize reduction 21, result has 75.6 percent of original size [2021-06-05 22:17:09,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:09,323 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 4 variables, input treesize:1332, output treesize:35 [2021-06-05 22:17:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:09,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174586730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:09,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:09,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 22:17:09,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956110617] [2021-06-05 22:17:09,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:09,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:09,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:09,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:09,389 INFO L87 Difference]: Start difference. First operand 916 states and 3043 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:10,549 INFO L93 Difference]: Finished difference Result 1137 states and 3638 transitions. [2021-06-05 22:17:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:17:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:10,551 INFO L225 Difference]: With dead ends: 1137 [2021-06-05 22:17:10,551 INFO L226 Difference]: Without dead ends: 1054 [2021-06-05 22:17:10,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 998.3ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:17:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-06-05 22:17:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 921. [2021-06-05 22:17:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.3293478260869565) internal successors, (3063), 920 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 3063 transitions. [2021-06-05 22:17:10,560 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 3063 transitions. Word has length 23 [2021-06-05 22:17:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:10,560 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 3063 transitions. [2021-06-05 22:17:10,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 3063 transitions. [2021-06-05 22:17:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:10,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:10,561 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:10,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8046,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:10,762 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:10,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1855513015, now seen corresponding path program 114 times [2021-06-05 22:17:10,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:10,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305817043] [2021-06-05 22:17:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:10,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:10,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305817043] [2021-06-05 22:17:10,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305817043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:10,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383441598] [2021-06-05 22:17:10,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:10,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:10,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:10,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:10,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:11,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:11,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:11,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:11,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:11,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,051 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,054 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:11,057 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,060 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,063 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,066 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,069 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,071 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:11,074 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,157 INFO L628 ElimStorePlain]: treesize reduction 34, result has 76.2 percent of original size [2021-06-05 22:17:11,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:17:11,159 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:582, output treesize:101 [2021-06-05 22:17:12,330 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9, v_prenex_148], 6=[char_at_5]} [2021-06-05 22:17:12,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:12,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,379 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:12,386 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,393 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,400 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:12,407 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,415 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,421 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,428 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:12,436 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,442 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,448 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,454 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,461 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,467 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,473 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,480 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:12,487 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,493 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,499 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,505 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,512 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,519 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,526 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,532 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:12,538 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,544 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,550 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,555 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:12,562 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,567 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,573 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,579 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,585 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,591 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,597 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,602 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,608 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,614 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,619 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,625 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,630 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,635 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,641 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,646 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,652 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,657 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,663 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,668 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:12,673 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,678 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,683 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,688 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,693 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,708 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,712 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,717 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,721 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,726 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,730 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,735 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,739 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,749 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,754 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,758 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,762 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:12,766 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,994 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 22:17:12,994 INFO L628 ElimStorePlain]: treesize reduction 177, result has 60.7 percent of original size [2021-06-05 22:17:12,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:12,999 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:13,003 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,139 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 22:17:13,139 INFO L628 ElimStorePlain]: treesize reduction 70, result has 71.9 percent of original size [2021-06-05 22:17:13,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:13,143 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:13,147 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:13,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:13,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:13,151 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:13,155 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:13,158 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,234 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.0 percent of original size [2021-06-05 22:17:13,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:13,235 INFO L247 ElimStorePlain]: Needed 80 recursive calls to eliminate 7 variables, input treesize:3429, output treesize:37 [2021-06-05 22:17:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:13,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383441598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:13,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:13,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:17:13,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360430208] [2021-06-05 22:17:13,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:17:13,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:17:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:17:13,332 INFO L87 Difference]: Start difference. First operand 921 states and 3063 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:13,846 INFO L93 Difference]: Finished difference Result 1155 states and 3757 transitions. [2021-06-05 22:17:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:13,848 INFO L225 Difference]: With dead ends: 1155 [2021-06-05 22:17:13,848 INFO L226 Difference]: Without dead ends: 1101 [2021-06-05 22:17:13,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 642.3ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-05 22:17:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 916. [2021-06-05 22:17:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.3256830601092897) internal successors, (3043), 915 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3043 transitions. [2021-06-05 22:17:13,857 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3043 transitions. Word has length 23 [2021-06-05 22:17:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:13,857 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3043 transitions. [2021-06-05 22:17:13,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3043 transitions. [2021-06-05 22:17:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:13,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:13,858 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:14,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8188 [2021-06-05 22:17:14,059 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:14,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1758609037, now seen corresponding path program 115 times [2021-06-05 22:17:14,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:14,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932079807] [2021-06-05 22:17:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:14,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:14,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932079807] [2021-06-05 22:17:14,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932079807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:14,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833526431] [2021-06-05 22:17:14,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:17:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833526431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:14,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:14,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:17:14,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974431925] [2021-06-05 22:17:14,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:17:14,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:14,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:17:14,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:14,436 INFO L87 Difference]: Start difference. First operand 916 states and 3043 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:15,778 INFO L93 Difference]: Finished difference Result 1672 states and 5314 transitions. [2021-06-05 22:17:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:17:15,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:15,780 INFO L225 Difference]: With dead ends: 1672 [2021-06-05 22:17:15,780 INFO L226 Difference]: Without dead ends: 1444 [2021-06-05 22:17:15,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1000.1ms TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:17:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-06-05 22:17:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 881. [2021-06-05 22:17:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.3113636363636365) internal successors, (2914), 880 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2914 transitions. [2021-06-05 22:17:15,790 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2914 transitions. Word has length 23 [2021-06-05 22:17:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:15,791 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2914 transitions. [2021-06-05 22:17:15,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2914 transitions. [2021-06-05 22:17:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:15,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:15,792 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:15,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8332 [2021-06-05 22:17:15,992 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1215666147, now seen corresponding path program 116 times [2021-06-05 22:17:15,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:15,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344794879] [2021-06-05 22:17:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:16,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344794879] [2021-06-05 22:17:16,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344794879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226442762] [2021-06-05 22:17:16,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:16,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:16,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:16,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:16,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226442762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:16,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:16,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:17:16,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844874708] [2021-06-05 22:17:16,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:17:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:16,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:17:16,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:16,313 INFO L87 Difference]: Start difference. First operand 881 states and 2914 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:16,762 INFO L93 Difference]: Finished difference Result 1280 states and 4054 transitions. [2021-06-05 22:17:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:16,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:16,763 INFO L225 Difference]: With dead ends: 1280 [2021-06-05 22:17:16,763 INFO L226 Difference]: Without dead ends: 1241 [2021-06-05 22:17:16,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:17:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-05 22:17:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 881. [2021-06-05 22:17:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.3113636363636365) internal successors, (2914), 880 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2914 transitions. [2021-06-05 22:17:16,773 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2914 transitions. Word has length 23 [2021-06-05 22:17:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:16,773 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2914 transitions. [2021-06-05 22:17:16,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2914 transitions. [2021-06-05 22:17:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:16,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:16,774 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:16,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8346 [2021-06-05 22:17:16,975 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash 118027997, now seen corresponding path program 117 times [2021-06-05 22:17:16,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:16,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308296659] [2021-06-05 22:17:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:17,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:17,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308296659] [2021-06-05 22:17:17,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308296659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:17,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65080942] [2021-06-05 22:17:17,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:17,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:17:17,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:17,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:17,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65080942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:17,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:17,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:17:17,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535570641] [2021-06-05 22:17:17,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:17:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:17:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:17,337 INFO L87 Difference]: Start difference. First operand 881 states and 2914 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:18,951 INFO L93 Difference]: Finished difference Result 1746 states and 5484 transitions. [2021-06-05 22:17:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:17:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:18,954 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 22:17:18,954 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 22:17:18,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1091.7ms TimeCoverageRelationStatistics Valid=245, Invalid=2107, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:17:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 22:17:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 849. [2021-06-05 22:17:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.294811320754717) internal successors, (2794), 848 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2794 transitions. [2021-06-05 22:17:18,966 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2794 transitions. Word has length 23 [2021-06-05 22:17:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:18,966 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2794 transitions. [2021-06-05 22:17:18,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2794 transitions. [2021-06-05 22:17:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:18,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:18,967 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:19,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8355 [2021-06-05 22:17:19,167 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1134996677, now seen corresponding path program 118 times [2021-06-05 22:17:19,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:19,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014126233] [2021-06-05 22:17:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:19,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:19,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014126233] [2021-06-05 22:17:19,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014126233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:19,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474094871] [2021-06-05 22:17:19,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:19,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:19,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:19,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:19,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:19,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:19,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:19,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,478 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:19,484 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,488 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,490 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:19,494 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,497 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,500 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,503 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,505 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,508 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,511 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,513 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:19,516 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,580 INFO L628 ElimStorePlain]: treesize reduction 12, result has 88.3 percent of original size [2021-06-05 22:17:19,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:19,584 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,624 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.7 percent of original size [2021-06-05 22:17:19,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:17:19,626 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 3 variables, input treesize:603, output treesize:51 [2021-06-05 22:17:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:20,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474094871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:20,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:20,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 22:17:20,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383660786] [2021-06-05 22:17:20,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:17:20,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:20,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:17:20,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:20,392 INFO L87 Difference]: Start difference. First operand 849 states and 2794 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:22,441 INFO L93 Difference]: Finished difference Result 1479 states and 4642 transitions. [2021-06-05 22:17:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:17:22,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:22,443 INFO L225 Difference]: With dead ends: 1479 [2021-06-05 22:17:22,443 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 22:17:22,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1441.2ms TimeCoverageRelationStatistics Valid=272, Invalid=2380, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:17:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 22:17:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 867. [2021-06-05 22:17:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.304849884526559) internal successors, (2862), 866 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2862 transitions. [2021-06-05 22:17:22,452 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2862 transitions. Word has length 23 [2021-06-05 22:17:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:22,453 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2862 transitions. [2021-06-05 22:17:22,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2862 transitions. [2021-06-05 22:17:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:22,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:22,454 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:22,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8367 [2021-06-05 22:17:22,654 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:22,654 INFO L82 PathProgramCache]: Analyzing trace with hash -187416341, now seen corresponding path program 119 times [2021-06-05 22:17:22,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:22,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9101227] [2021-06-05 22:17:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:22,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:22,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9101227] [2021-06-05 22:17:22,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9101227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:22,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979370] [2021-06-05 22:17:22,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:22,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:22,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:22,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:17:22,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:23,166 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 22:17:25,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:25,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:25,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:25,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:25,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:25,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:25,332 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:25,362 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,379 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:25,397 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:25,415 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,430 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:25,447 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,460 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,475 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:25,492 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:25,512 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:25,531 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:25,549 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:25,567 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,581 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:25,597 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:25,613 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:25,630 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:25,647 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,660 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:25,679 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:25,697 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:25,717 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,735 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,750 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,767 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,781 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:25,801 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,819 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 22:17:25,839 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:25,860 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,876 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:25,896 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,915 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:25,935 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:25,957 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:25,978 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:26,001 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:26,020 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,039 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 22:17:26,058 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,075 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,093 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,114 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,130 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:26,151 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,170 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,191 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,207 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,232 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:26,251 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,269 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:26,288 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,307 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:26,327 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:26,346 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:26,365 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:26,385 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,405 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:26,428 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,477 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,490 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:26,502 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:26,515 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:26,531 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:26,544 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,557 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,570 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:26,583 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:26,597 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,608 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,620 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,633 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,643 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:26,657 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,670 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:26,683 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:26,696 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:26,709 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,723 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,736 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:26,751 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 22:17:26,771 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,784 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:26,798 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,811 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,825 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,838 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,849 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:26,863 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:26,877 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:26,891 INFO L550 ElimStorePlain]: Start of recursive call 100: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,904 INFO L550 ElimStorePlain]: Start of recursive call 101: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:26,918 INFO L550 ElimStorePlain]: Start of recursive call 102: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,932 INFO L550 ElimStorePlain]: Start of recursive call 103: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:26,947 INFO L550 ElimStorePlain]: Start of recursive call 104: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,959 INFO L550 ElimStorePlain]: Start of recursive call 105: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,972 INFO L550 ElimStorePlain]: Start of recursive call 106: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,983 INFO L550 ElimStorePlain]: Start of recursive call 107: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:26,994 INFO L550 ElimStorePlain]: Start of recursive call 108: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:27,006 INFO L550 ElimStorePlain]: Start of recursive call 109: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,019 INFO L550 ElimStorePlain]: Start of recursive call 110: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,030 INFO L550 ElimStorePlain]: Start of recursive call 111: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,042 INFO L550 ElimStorePlain]: Start of recursive call 112: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,055 INFO L550 ElimStorePlain]: Start of recursive call 113: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:27,070 INFO L550 ElimStorePlain]: Start of recursive call 114: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,083 INFO L550 ElimStorePlain]: Start of recursive call 115: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,095 INFO L550 ElimStorePlain]: Start of recursive call 116: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,106 INFO L550 ElimStorePlain]: Start of recursive call 117: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,118 INFO L550 ElimStorePlain]: Start of recursive call 118: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,135 INFO L550 ElimStorePlain]: Start of recursive call 119: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:27,149 INFO L550 ElimStorePlain]: Start of recursive call 120: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,163 INFO L550 ElimStorePlain]: Start of recursive call 121: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,181 INFO L550 ElimStorePlain]: Start of recursive call 122: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,195 INFO L550 ElimStorePlain]: Start of recursive call 123: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,209 INFO L550 ElimStorePlain]: Start of recursive call 124: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:27,228 INFO L550 ElimStorePlain]: Start of recursive call 125: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,244 INFO L550 ElimStorePlain]: Start of recursive call 126: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,259 INFO L550 ElimStorePlain]: Start of recursive call 127: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,275 INFO L550 ElimStorePlain]: Start of recursive call 128: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,287 INFO L550 ElimStorePlain]: Start of recursive call 129: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,300 INFO L550 ElimStorePlain]: Start of recursive call 130: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,315 INFO L550 ElimStorePlain]: Start of recursive call 131: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,329 INFO L550 ElimStorePlain]: Start of recursive call 132: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,343 INFO L550 ElimStorePlain]: Start of recursive call 133: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,358 INFO L550 ElimStorePlain]: Start of recursive call 134: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,373 INFO L550 ElimStorePlain]: Start of recursive call 135: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,388 INFO L550 ElimStorePlain]: Start of recursive call 136: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:27,403 INFO L550 ElimStorePlain]: Start of recursive call 137: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:27,417 INFO L550 ElimStorePlain]: Start of recursive call 138: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,430 INFO L550 ElimStorePlain]: Start of recursive call 139: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,444 INFO L550 ElimStorePlain]: Start of recursive call 140: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,456 INFO L550 ElimStorePlain]: Start of recursive call 141: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,469 INFO L550 ElimStorePlain]: Start of recursive call 142: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:27,484 INFO L550 ElimStorePlain]: Start of recursive call 143: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,500 INFO L550 ElimStorePlain]: Start of recursive call 144: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,514 INFO L550 ElimStorePlain]: Start of recursive call 145: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,526 INFO L550 ElimStorePlain]: Start of recursive call 146: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,542 INFO L550 ElimStorePlain]: Start of recursive call 147: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,555 INFO L550 ElimStorePlain]: Start of recursive call 148: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,569 INFO L550 ElimStorePlain]: Start of recursive call 149: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,580 INFO L550 ElimStorePlain]: Start of recursive call 150: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,594 INFO L550 ElimStorePlain]: Start of recursive call 151: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,609 INFO L550 ElimStorePlain]: Start of recursive call 152: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:27,625 INFO L550 ElimStorePlain]: Start of recursive call 153: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,636 INFO L550 ElimStorePlain]: Start of recursive call 154: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:27,648 INFO L550 ElimStorePlain]: Start of recursive call 155: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,660 INFO L550 ElimStorePlain]: Start of recursive call 156: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,671 INFO L550 ElimStorePlain]: Start of recursive call 157: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,682 INFO L550 ElimStorePlain]: Start of recursive call 158: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,692 INFO L550 ElimStorePlain]: Start of recursive call 159: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,704 INFO L550 ElimStorePlain]: Start of recursive call 160: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,715 INFO L550 ElimStorePlain]: Start of recursive call 161: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,726 INFO L550 ElimStorePlain]: Start of recursive call 162: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,737 INFO L550 ElimStorePlain]: Start of recursive call 163: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,747 INFO L550 ElimStorePlain]: Start of recursive call 164: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:27,759 INFO L550 ElimStorePlain]: Start of recursive call 165: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:27,770 INFO L550 ElimStorePlain]: Start of recursive call 166: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,781 INFO L550 ElimStorePlain]: Start of recursive call 167: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,791 INFO L550 ElimStorePlain]: Start of recursive call 168: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:27,803 INFO L550 ElimStorePlain]: Start of recursive call 169: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,817 INFO L550 ElimStorePlain]: Start of recursive call 170: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,828 INFO L550 ElimStorePlain]: Start of recursive call 171: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:27,837 INFO L550 ElimStorePlain]: Start of recursive call 172: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:28,821 WARN L205 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 128 [2021-06-05 22:17:28,822 INFO L628 ElimStorePlain]: treesize reduction 498, result has 67.3 percent of original size [2021-06-05 22:17:28,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-1 vars, End of recursive call: 39 dim-0 vars, and 24 xjuncts. [2021-06-05 22:17:28,841 INFO L247 ElimStorePlain]: Needed 172 recursive calls to eliminate 11 variables, input treesize:10146, output treesize:951 [2021-06-05 22:17:29,376 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 279 [2021-06-05 22:17:29,787 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2021-06-05 22:17:31,070 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_219, v_prenex_188, v_prenex_202], 1=[v_prenex_190, char_at_1, v_prenex_192, v_prenex_194, v_prenex_196, v_prenex_198, v_prenex_210, v_prenex_200, v_prenex_211, v_prenex_212, v_prenex_213, v_prenex_214, v_prenex_204, v_prenex_215, v_prenex_216, v_prenex_217, v_prenex_206, v_prenex_218, v_prenex_207, v_prenex_208, v_prenex_209]} [2021-06-05 22:17:31,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:31,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:31,712 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 182 [2021-06-05 22:17:31,712 INFO L628 ElimStorePlain]: treesize reduction 970, result has 32.4 percent of original size [2021-06-05 22:17:31,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:31,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:31,909 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-06-05 22:17:31,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:31,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:31,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,101 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-06-05 22:17:32,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:32,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:32,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,296 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 22:17:32,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:32,297 INFO L518 ElimStorePlain]: Eliminatee char_at_1 vanished before elimination [2021-06-05 22:17:32,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:32,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,486 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 22:17:32,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:32,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:32,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,672 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 22:17:32,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:32,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:32,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,856 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 22:17:32,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:32,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:32,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,038 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-06-05 22:17:33,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:33,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:33,047 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,217 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 22:17:33,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:33,218 INFO L518 ElimStorePlain]: Eliminatee v_prenex_200 vanished before elimination [2021-06-05 22:17:33,218 INFO L518 ElimStorePlain]: Eliminatee v_prenex_211 vanished before elimination [2021-06-05 22:17:33,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:33,226 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,410 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 22:17:33,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:33,410 INFO L518 ElimStorePlain]: Eliminatee v_prenex_213 vanished before elimination [2021-06-05 22:17:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:33,419 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,591 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-05 22:17:33,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:33,592 INFO L518 ElimStorePlain]: Eliminatee v_prenex_204 vanished before elimination [2021-06-05 22:17:33,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:33,600 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,776 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 22:17:33,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:33,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:33,783 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,940 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 22:17:33,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:33,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:33,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:33,948 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,101 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 22:17:34,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,102 INFO L518 ElimStorePlain]: Eliminatee v_prenex_206 vanished before elimination [2021-06-05 22:17:34,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:34,108 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,257 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 22:17:34,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,258 INFO L518 ElimStorePlain]: Eliminatee v_prenex_207 vanished before elimination [2021-06-05 22:17:34,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:34,264 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,412 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 22:17:34,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_209 vanished before elimination [2021-06-05 22:17:34,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 24 dim-0 vars, 24 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:17:34,416 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 48 variables, input treesize:1439, output treesize:116 [2021-06-05 22:17:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:34,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:34,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:34,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2021-06-05 22:17:34,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241796701] [2021-06-05 22:17:34,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:17:34,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:17:34,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:34,584 INFO L87 Difference]: Start difference. First operand 867 states and 2862 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:35,220 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 22:17:35,675 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 207 [2021-06-05 22:17:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:36,154 INFO L93 Difference]: Finished difference Result 1213 states and 3864 transitions. [2021-06-05 22:17:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:17:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:36,156 INFO L225 Difference]: With dead ends: 1213 [2021-06-05 22:17:36,156 INFO L226 Difference]: Without dead ends: 1101 [2021-06-05 22:17:36,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2123.0ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:17:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-05 22:17:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 840. [2021-06-05 22:17:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.301549463647199) internal successors, (2770), 839 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2770 transitions. [2021-06-05 22:17:36,166 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2770 transitions. Word has length 23 [2021-06-05 22:17:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:36,166 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2770 transitions. [2021-06-05 22:17:36,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2770 transitions. [2021-06-05 22:17:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:36,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:36,167 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:36,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8591,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:36,367 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:36,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:36,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1702533039, now seen corresponding path program 120 times [2021-06-05 22:17:36,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:36,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588798064] [2021-06-05 22:17:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:36,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:36,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588798064] [2021-06-05 22:17:36,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588798064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:36,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770036077] [2021-06-05 22:17:36,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:36,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:36,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:36,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:36,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:36,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,858 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:36,862 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,865 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,868 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,871 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,874 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,877 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:36,880 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,883 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,960 INFO L628 ElimStorePlain]: treesize reduction 107, result has 49.0 percent of original size [2021-06-05 22:17:36,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:36,963 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,012 INFO L628 ElimStorePlain]: treesize reduction 23, result has 74.7 percent of original size [2021-06-05 22:17:37,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:17:37,014 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 3 variables, input treesize:622, output treesize:60 [2021-06-05 22:17:37,924 INFO L446 ElimStorePlain]: Different costs {0=[char_at_1], 3=[char_at_5]} [2021-06-05 22:17:37,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:37,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:37,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:37,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:37,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:37,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:37,965 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:37,971 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:37,978 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:37,984 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:37,990 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:37,997 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,004 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:38,011 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,018 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,025 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:38,032 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,038 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,044 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:38,052 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,058 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,064 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,070 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,076 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,082 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,088 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,094 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,122 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,128 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,133 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:38,139 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,144 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,148 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,153 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,158 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,162 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,167 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,172 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,176 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,182 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,186 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,191 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,196 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:38,201 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,206 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,210 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:38,215 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,220 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,225 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,229 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,234 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:38,239 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,243 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,248 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,252 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:38,257 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,261 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,265 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,270 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,274 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,278 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,282 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:38,286 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,290 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,294 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,298 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,301 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,490 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 22:17:38,491 INFO L628 ElimStorePlain]: treesize reduction 130, result has 64.4 percent of original size [2021-06-05 22:17:38,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:38,496 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:38,499 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:38,503 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:38,507 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:38,511 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:38,514 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:38,518 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,633 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-05 22:17:38,633 INFO L628 ElimStorePlain]: treesize reduction 25, result has 85.5 percent of original size [2021-06-05 22:17:38,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:17:38,635 INFO L247 ElimStorePlain]: Needed 74 recursive calls to eliminate 5 variables, input treesize:2877, output treesize:47 [2021-06-05 22:17:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:38,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770036077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:38,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:38,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 22:17:38,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128803200] [2021-06-05 22:17:38,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:38,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:38,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:38,751 INFO L87 Difference]: Start difference. First operand 840 states and 2770 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:40,232 INFO L93 Difference]: Finished difference Result 1376 states and 4410 transitions. [2021-06-05 22:17:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:17:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:40,234 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 22:17:40,234 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 22:17:40,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1366.5ms TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:17:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 22:17:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 859. [2021-06-05 22:17:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.2983682983682985) internal successors, (2830), 858 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2830 transitions. [2021-06-05 22:17:40,244 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2830 transitions. Word has length 23 [2021-06-05 22:17:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:40,244 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2830 transitions. [2021-06-05 22:17:40,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2830 transitions. [2021-06-05 22:17:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:40,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:40,245 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:40,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9094,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:40,445 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1080273807, now seen corresponding path program 121 times [2021-06-05 22:17:40,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:40,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742267825] [2021-06-05 22:17:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:40,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742267825] [2021-06-05 22:17:40,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742267825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790402542] [2021-06-05 22:17:40,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:40,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:17:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:40,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:40,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:40,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:40,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:40,739 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:40,742 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,745 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,748 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,751 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,753 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:40,756 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,759 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:40,762 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,765 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,768 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,854 INFO L628 ElimStorePlain]: treesize reduction 33, result has 79.2 percent of original size [2021-06-05 22:17:40,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-06-05 22:17:40,857 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:566, output treesize:126 [2021-06-05 22:17:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:41,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:41,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:41,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:41,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:41,638 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:41,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:41,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,926 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2021-06-05 22:17:41,927 INFO L628 ElimStorePlain]: treesize reduction 870, result has 21.2 percent of original size [2021-06-05 22:17:41,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:41,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:41,936 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:42,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:42,033 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:42,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:42,127 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:42,131 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:42,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:42,221 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:42,225 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:42,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:17:42,308 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 10 variables, input treesize:1296, output treesize:68 [2021-06-05 22:17:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:42,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790402542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:42,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:42,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:17:42,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688749046] [2021-06-05 22:17:42,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:17:42,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:17:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:42,455 INFO L87 Difference]: Start difference. First operand 859 states and 2830 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:44,307 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-05 22:17:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:45,315 INFO L93 Difference]: Finished difference Result 1704 states and 5173 transitions. [2021-06-05 22:17:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:17:45,315 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:45,317 INFO L225 Difference]: With dead ends: 1704 [2021-06-05 22:17:45,317 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 22:17:45,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2343.5ms TimeCoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:17:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 22:17:45,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 954. [2021-06-05 22:17:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.3641133263378804) internal successors, (3206), 953 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3206 transitions. [2021-06-05 22:17:45,329 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3206 transitions. Word has length 23 [2021-06-05 22:17:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:45,329 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3206 transitions. [2021-06-05 22:17:45,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3206 transitions. [2021-06-05 22:17:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:45,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:45,330 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:45,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9282,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:45,532 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1491466861, now seen corresponding path program 122 times [2021-06-05 22:17:45,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:45,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60631840] [2021-06-05 22:17:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:45,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:45,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60631840] [2021-06-05 22:17:45,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60631840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:45,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340181243] [2021-06-05 22:17:45,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:45,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:45,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:45,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:45,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:45,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:45,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:45,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:45,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:45,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:45,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:45,993 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:45,998 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,001 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:46,004 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,008 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,011 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:46,014 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,017 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:46,021 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,024 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:46,027 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:46,031 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,034 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,037 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,040 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,043 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,046 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:46,049 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,134 INFO L628 ElimStorePlain]: treesize reduction 128, result has 46.0 percent of original size [2021-06-05 22:17:46,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:17:46,137 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:853, output treesize:101 [2021-06-05 22:17:47,077 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9, v_prenex_232, v_prenex_233, v_prenex_234, v_prenex_235], 6=[char_at_5]} [2021-06-05 22:17:47,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:47,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:47,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:47,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:47,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:47,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:47,114 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:47,120 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:47,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,708 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-05 22:17:47,708 INFO L628 ElimStorePlain]: treesize reduction 780, result has 45.0 percent of original size [2021-06-05 22:17:47,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:47,713 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:47,719 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:47,723 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:47,728 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:47,732 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:47,737 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:47,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:47,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:47,746 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,031 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-05 22:17:48,032 INFO L628 ElimStorePlain]: treesize reduction 124, result has 74.5 percent of original size [2021-06-05 22:17:48,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:48,037 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:48,041 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,246 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 22:17:48,246 INFO L628 ElimStorePlain]: treesize reduction 80, result has 77.3 percent of original size [2021-06-05 22:17:48,247 INFO L518 ElimStorePlain]: Eliminatee v_prenex_234 vanished before elimination [2021-06-05 22:17:48,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:48,251 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:48,255 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,394 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 22:17:48,394 INFO L628 ElimStorePlain]: treesize reduction 70, result has 71.9 percent of original size [2021-06-05 22:17:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:48,398 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:48,402 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:48,405 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:48,408 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:48,412 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,499 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.0 percent of original size [2021-06-05 22:17:48,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:48,500 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 10 variables, input treesize:1685, output treesize:37 [2021-06-05 22:17:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:48,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340181243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:48,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:48,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 22:17:48,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906832353] [2021-06-05 22:17:48,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:48,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:48,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:48,609 INFO L87 Difference]: Start difference. First operand 954 states and 3206 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,425 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 22:17:49,620 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-06-05 22:17:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:50,362 INFO L93 Difference]: Finished difference Result 1547 states and 4856 transitions. [2021-06-05 22:17:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:17:50,363 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:50,365 INFO L225 Difference]: With dead ends: 1547 [2021-06-05 22:17:50,365 INFO L226 Difference]: Without dead ends: 1421 [2021-06-05 22:17:50,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1454.4ms TimeCoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:17:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-06-05 22:17:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 949. [2021-06-05 22:17:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 3.359704641350211) internal successors, (3185), 948 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 3185 transitions. [2021-06-05 22:17:50,376 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 3185 transitions. Word has length 23 [2021-06-05 22:17:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:50,376 INFO L482 AbstractCegarLoop]: Abstraction has 949 states and 3185 transitions. [2021-06-05 22:17:50,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 3185 transitions. [2021-06-05 22:17:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:50,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:50,377 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:50,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9447 [2021-06-05 22:17:50,578 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:50,578 INFO L82 PathProgramCache]: Analyzing trace with hash -537214787, now seen corresponding path program 123 times [2021-06-05 22:17:50,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:50,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545972054] [2021-06-05 22:17:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:50,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:50,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545972054] [2021-06-05 22:17:50,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545972054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:50,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528068783] [2021-06-05 22:17:50,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:50,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:50,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:50,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:50,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:50,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:50,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:50,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:50,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:50,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:50,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:50,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:50,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:50,976 INFO L628 ElimStorePlain]: treesize reduction 138, result has 46.7 percent of original size [2021-06-05 22:17:50,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:17:50,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,022 INFO L628 ElimStorePlain]: treesize reduction 50, result has 54.1 percent of original size [2021-06-05 22:17:51,022 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-06-05 22:17:51,022 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-06-05 22:17:51,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:17:51,024 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:319, output treesize:51 [2021-06-05 22:17:51,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:51,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:51,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:51,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:51,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:51,759 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:51,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,876 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 22:17:51,876 INFO L628 ElimStorePlain]: treesize reduction 171, result has 38.7 percent of original size [2021-06-05 22:17:51,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:51,880 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:51,883 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:51,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:17:51,925 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:429, output treesize:47 [2021-06-05 22:17:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:52,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528068783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:52,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:52,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:17:52,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056400951] [2021-06-05 22:17:52,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:17:52,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:52,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:17:52,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:52,032 INFO L87 Difference]: Start difference. First operand 949 states and 3185 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:53,592 INFO L93 Difference]: Finished difference Result 1387 states and 4352 transitions. [2021-06-05 22:17:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:17:53,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:53,594 INFO L225 Difference]: With dead ends: 1387 [2021-06-05 22:17:53,594 INFO L226 Difference]: Without dead ends: 1226 [2021-06-05 22:17:53,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1142.7ms TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:17:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-06-05 22:17:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 879. [2021-06-05 22:17:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.298405466970387) internal successors, (2896), 878 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2896 transitions. [2021-06-05 22:17:53,604 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2896 transitions. Word has length 23 [2021-06-05 22:17:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:53,604 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2896 transitions. [2021-06-05 22:17:53,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2896 transitions. [2021-06-05 22:17:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:53,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:53,605 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:53,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9590,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:53,813 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1557005805, now seen corresponding path program 124 times [2021-06-05 22:17:53,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:53,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743601505] [2021-06-05 22:17:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:53,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:53,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743601505] [2021-06-05 22:17:53,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743601505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:53,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459734883] [2021-06-05 22:17:53,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:53,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:53,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:53,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:53,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:54,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459734883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:54,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:54,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:17:54,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090818795] [2021-06-05 22:17:54,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:17:54,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:54,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:17:54,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:54,166 INFO L87 Difference]: Start difference. First operand 879 states and 2896 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:54,979 INFO L93 Difference]: Finished difference Result 1211 states and 3809 transitions. [2021-06-05 22:17:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:17:54,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:17:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:54,981 INFO L225 Difference]: With dead ends: 1211 [2021-06-05 22:17:54,981 INFO L226 Difference]: Without dead ends: 1085 [2021-06-05 22:17:54,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:17:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-06-05 22:17:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 893. [2021-06-05 22:17:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.307174887892377) internal successors, (2950), 892 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2950 transitions. [2021-06-05 22:17:54,990 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2950 transitions. Word has length 23 [2021-06-05 22:17:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:54,990 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 2950 transitions. [2021-06-05 22:17:54,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2950 transitions. [2021-06-05 22:17:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:17:54,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:54,991 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:55,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9835,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:55,192 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash 264130093, now seen corresponding path program 125 times [2021-06-05 22:17:55,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:55,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378996583] [2021-06-05 22:17:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:55,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:55,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378996583] [2021-06-05 22:17:55,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378996583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:55,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324104435] [2021-06-05 22:17:55,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:55,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:55,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:17:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:56,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:56,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:56,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,382 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:56,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,399 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:56,409 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,417 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,428 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,439 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,450 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:56,460 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,471 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,478 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,489 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:56,501 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,512 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:17:56,522 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,533 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:56,542 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,550 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:56,559 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,569 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,578 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,588 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,598 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,606 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,614 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,625 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,632 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,641 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 22:17:56,652 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,661 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,672 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,680 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:56,689 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,698 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,707 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,714 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,723 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,731 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,739 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,748 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:17:56,758 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,764 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 22:17:56,773 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,781 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,788 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:56,797 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,805 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,812 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,821 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,830 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,839 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:56,847 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,854 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,862 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,868 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,875 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,882 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,889 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,898 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,906 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,914 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:17:56,923 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,930 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,939 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 22:17:56,947 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,956 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:56,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:56,964 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,973 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,983 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,990 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:56,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:56,998 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,006 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,014 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,022 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,033 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,043 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,054 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,064 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 22:17:57,090 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,095 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,101 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,106 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,111 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,116 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,122 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,128 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,133 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,138 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,143 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,148 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,154 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,159 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,164 INFO L550 ElimStorePlain]: Start of recursive call 100: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,169 INFO L550 ElimStorePlain]: Start of recursive call 101: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,175 INFO L550 ElimStorePlain]: Start of recursive call 102: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,181 INFO L550 ElimStorePlain]: Start of recursive call 103: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,186 INFO L550 ElimStorePlain]: Start of recursive call 104: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,191 INFO L550 ElimStorePlain]: Start of recursive call 105: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,196 INFO L550 ElimStorePlain]: Start of recursive call 106: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,200 INFO L550 ElimStorePlain]: Start of recursive call 107: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,205 INFO L550 ElimStorePlain]: Start of recursive call 108: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,210 INFO L550 ElimStorePlain]: Start of recursive call 109: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,218 INFO L550 ElimStorePlain]: Start of recursive call 110: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,224 INFO L550 ElimStorePlain]: Start of recursive call 111: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,230 INFO L550 ElimStorePlain]: Start of recursive call 112: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,235 INFO L550 ElimStorePlain]: Start of recursive call 113: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,241 INFO L550 ElimStorePlain]: Start of recursive call 114: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,245 INFO L550 ElimStorePlain]: Start of recursive call 115: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,249 INFO L550 ElimStorePlain]: Start of recursive call 116: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,255 INFO L550 ElimStorePlain]: Start of recursive call 117: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,260 INFO L550 ElimStorePlain]: Start of recursive call 118: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,264 INFO L550 ElimStorePlain]: Start of recursive call 119: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,268 INFO L550 ElimStorePlain]: Start of recursive call 120: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:17:57,273 INFO L550 ElimStorePlain]: Start of recursive call 121: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,277 INFO L550 ElimStorePlain]: Start of recursive call 122: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,281 INFO L550 ElimStorePlain]: Start of recursive call 123: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,285 INFO L550 ElimStorePlain]: Start of recursive call 124: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,290 INFO L550 ElimStorePlain]: Start of recursive call 125: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,295 INFO L550 ElimStorePlain]: Start of recursive call 126: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,299 INFO L550 ElimStorePlain]: Start of recursive call 127: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:57,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:17:57,304 INFO L550 ElimStorePlain]: Start of recursive call 128: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,308 INFO L550 ElimStorePlain]: Start of recursive call 129: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:57,311 INFO L550 ElimStorePlain]: Start of recursive call 130: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:57,592 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 22:17:57,592 INFO L628 ElimStorePlain]: treesize reduction 183, result has 68.3 percent of original size [2021-06-05 22:17:57,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 10 dim-0 vars, and 11 xjuncts. [2021-06-05 22:17:57,598 INFO L247 ElimStorePlain]: Needed 130 recursive calls to eliminate 2 variables, input treesize:6328, output treesize:386 [2021-06-05 22:17:57,775 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 22:17:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:58,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324104435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:58,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:58,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:17:58,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973423054] [2021-06-05 22:17:58,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:17:58,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:17:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:17:58,603 INFO L87 Difference]: Start difference. First operand 893 states and 2950 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:59,413 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 148 [2021-06-05 22:17:59,634 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 107 [2021-06-05 22:17:59,838 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 22:18:00,007 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-05 22:18:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:00,215 INFO L93 Difference]: Finished difference Result 1036 states and 3349 transitions. [2021-06-05 22:18:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:00,217 INFO L225 Difference]: With dead ends: 1036 [2021-06-05 22:18:00,217 INFO L226 Difference]: Without dead ends: 1021 [2021-06-05 22:18:00,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1751.8ms TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:18:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-05 22:18:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 900. [2021-06-05 22:18:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.3092324805339266) internal successors, (2975), 899 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2975 transitions. [2021-06-05 22:18:00,226 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2975 transitions. Word has length 23 [2021-06-05 22:18:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:00,226 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2975 transitions. [2021-06-05 22:18:00,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2975 transitions. [2021-06-05 22:18:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:00,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:00,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:00,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9846,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:00,427 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1634624903, now seen corresponding path program 126 times [2021-06-05 22:18:00,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:00,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720570157] [2021-06-05 22:18:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:00,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:00,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720570157] [2021-06-05 22:18:00,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720570157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:00,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857319002] [2021-06-05 22:18:00,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:00,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:18:00,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:00,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:00,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:01,382 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_260, v_prenex_256, v_prenex_257, v_prenex_258, v_prenex_259], 1=[char_at_1]} [2021-06-05 22:18:01,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:01,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:01,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:01,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:01,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,773 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-05 22:18:01,774 INFO L628 ElimStorePlain]: treesize reduction 914, result has 33.3 percent of original size [2021-06-05 22:18:01,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:01,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:01,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:01,786 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:01,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,924 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 22:18:01,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:01,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:01,928 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:01,932 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:01,936 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:01,939 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:01,943 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:01,946 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:01,949 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:01,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:01,953 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:02,077 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-05 22:18:02,077 INFO L628 ElimStorePlain]: treesize reduction 102, result has 63.4 percent of original size [2021-06-05 22:18:02,077 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-06-05 22:18:02,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:02,081 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:02,170 INFO L628 ElimStorePlain]: treesize reduction 38, result has 77.0 percent of original size [2021-06-05 22:18:02,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:02,174 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:02,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:02,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:02,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:02,178 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:02,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:02,180 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:02,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:02,183 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:02,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:02,185 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:02,228 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-06-05 22:18:02,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:18:02,229 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 7 variables, input treesize:1469, output treesize:35 [2021-06-05 22:18:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:02,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857319002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:02,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:02,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:18:02,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598372182] [2021-06-05 22:18:02,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:18:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:18:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:18:02,325 INFO L87 Difference]: Start difference. First operand 900 states and 2975 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:03,422 INFO L93 Difference]: Finished difference Result 1241 states and 3963 transitions. [2021-06-05 22:18:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:18:03,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:03,424 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 22:18:03,424 INFO L226 Difference]: Without dead ends: 1124 [2021-06-05 22:18:03,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1029.1ms TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:18:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-06-05 22:18:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 877. [2021-06-05 22:18:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.3047945205479454) internal successors, (2895), 876 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2895 transitions. [2021-06-05 22:18:03,433 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2895 transitions. Word has length 23 [2021-06-05 22:18:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:03,433 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2895 transitions. [2021-06-05 22:18:03,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2895 transitions. [2021-06-05 22:18:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:03,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:03,434 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:03,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10302,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:03,635 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:03,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2109037131, now seen corresponding path program 127 times [2021-06-05 22:18:03,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:03,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402652639] [2021-06-05 22:18:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:03,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402652639] [2021-06-05 22:18:03,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402652639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372791421] [2021-06-05 22:18:03,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:03,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:03,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:03,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:03,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:03,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:03,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:03,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:03,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:03,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:04,003 INFO L628 ElimStorePlain]: treesize reduction 110, result has 52.4 percent of original size [2021-06-05 22:18:04,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:04,007 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:04,064 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-05 22:18:04,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:04,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:04,108 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.7 percent of original size [2021-06-05 22:18:04,108 INFO L518 ElimStorePlain]: Eliminatee v_prenex_264 vanished before elimination [2021-06-05 22:18:04,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:18:04,110 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:291, output treesize:51 [2021-06-05 22:18:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:04,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372791421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:04,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:04,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:18:04,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758548350] [2021-06-05 22:18:04,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:04,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:04,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:04,769 INFO L87 Difference]: Start difference. First operand 877 states and 2895 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:06,210 INFO L93 Difference]: Finished difference Result 1440 states and 4504 transitions. [2021-06-05 22:18:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:18:06,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:06,212 INFO L225 Difference]: With dead ends: 1440 [2021-06-05 22:18:06,212 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 22:18:06,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 996.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:18:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 22:18:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 900. [2021-06-05 22:18:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.3192436040044493) internal successors, (2984), 899 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2984 transitions. [2021-06-05 22:18:06,222 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2984 transitions. Word has length 23 [2021-06-05 22:18:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:06,222 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2984 transitions. [2021-06-05 22:18:06,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2984 transitions. [2021-06-05 22:18:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:06,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:06,223 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:06,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10474 [2021-06-05 22:18:06,424 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:06,424 INFO L82 PathProgramCache]: Analyzing trace with hash 786624113, now seen corresponding path program 128 times [2021-06-05 22:18:06,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:06,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83973012] [2021-06-05 22:18:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:06,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83973012] [2021-06-05 22:18:06,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83973012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187724713] [2021-06-05 22:18:06,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:06,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:06,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:06,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:06,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:06,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,702 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,704 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:06,708 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,711 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,713 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,716 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,719 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:06,722 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:06,725 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:06,807 INFO L628 ElimStorePlain]: treesize reduction 34, result has 76.2 percent of original size [2021-06-05 22:18:06,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:18:06,810 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:507, output treesize:101 [2021-06-05 22:18:07,704 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9, v_prenex_268], 6=[char_at_5]} [2021-06-05 22:18:07,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:07,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:07,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:07,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:07,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:07,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:07,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:07,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,328 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 64 [2021-06-05 22:18:08,328 INFO L628 ElimStorePlain]: treesize reduction 2836, result has 13.8 percent of original size [2021-06-05 22:18:08,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:08,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:08,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:08,341 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:08,346 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:08,350 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:08,354 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:08,358 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:08,361 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,502 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 22:18:08,503 INFO L628 ElimStorePlain]: treesize reduction 124, result has 59.1 percent of original size [2021-06-05 22:18:08,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:08,507 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:08,510 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:08,514 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:08,517 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:08,520 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:08,596 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.0 percent of original size [2021-06-05 22:18:08,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:18:08,598 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 7 variables, input treesize:3429, output treesize:37 [2021-06-05 22:18:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:08,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187724713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:08,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:08,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:18:08,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134578348] [2021-06-05 22:18:08,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:18:08,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:08,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:18:08,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:18:08,703 INFO L87 Difference]: Start difference. First operand 900 states and 2984 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:09,082 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 22:18:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:09,247 INFO L93 Difference]: Finished difference Result 1168 states and 3771 transitions. [2021-06-05 22:18:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:18:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:09,249 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 22:18:09,249 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 22:18:09,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:18:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 22:18:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 871. [2021-06-05 22:18:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.3057471264367817) internal successors, (2876), 870 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2876 transitions. [2021-06-05 22:18:09,258 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2876 transitions. Word has length 23 [2021-06-05 22:18:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:09,258 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2876 transitions. [2021-06-05 22:18:09,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2876 transitions. [2021-06-05 22:18:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:09,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:09,259 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:09,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10640 [2021-06-05 22:18:09,460 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash -877394613, now seen corresponding path program 129 times [2021-06-05 22:18:09,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:09,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190140565] [2021-06-05 22:18:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:09,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:09,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190140565] [2021-06-05 22:18:09,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190140565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:09,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680559918] [2021-06-05 22:18:09,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:09,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:18:09,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:09,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:10,516 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_270, v_prenex_271, v_prenex_272, char_at_5, v_prenex_269], 1=[char_at_1]} [2021-06-05 22:18:10,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:10,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:10,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,685 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-06-05 22:18:10,685 INFO L628 ElimStorePlain]: treesize reduction 442, result has 31.5 percent of original size [2021-06-05 22:18:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:10,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:10,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:10,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:10,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:10,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:10,757 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:10,760 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,809 INFO L628 ElimStorePlain]: treesize reduction 46, result has 61.3 percent of original size [2021-06-05 22:18:10,810 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:18:10,810 INFO L518 ElimStorePlain]: Eliminatee v_prenex_269 vanished before elimination [2021-06-05 22:18:10,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:10,812 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:10,815 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:10,818 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:10,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:10,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:18:10,831 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:699, output treesize:20 [2021-06-05 22:18:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:10,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680559918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:10,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:10,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 22:18:10,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980376425] [2021-06-05 22:18:10,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:10,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:10,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:10,874 INFO L87 Difference]: Start difference. First operand 871 states and 2876 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:11,187 INFO L93 Difference]: Finished difference Result 1024 states and 3279 transitions. [2021-06-05 22:18:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:18:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:11,189 INFO L225 Difference]: With dead ends: 1024 [2021-06-05 22:18:11,189 INFO L226 Difference]: Without dead ends: 979 [2021-06-05 22:18:11,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:18:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-06-05 22:18:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 870. [2021-06-05 22:18:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.3049482163406214) internal successors, (2872), 869 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2872 transitions. [2021-06-05 22:18:11,197 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2872 transitions. Word has length 23 [2021-06-05 22:18:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:11,197 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2872 transitions. [2021-06-05 22:18:11,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2872 transitions. [2021-06-05 22:18:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:11,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:11,198 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:11,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10767,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:11,399 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1721607211, now seen corresponding path program 130 times [2021-06-05 22:18:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:11,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523868035] [2021-06-05 22:18:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:11,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:11,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523868035] [2021-06-05 22:18:11,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523868035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:11,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460728603] [2021-06-05 22:18:11,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:11,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:11,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:12,644 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_273, v_prenex_274, v_prenex_275, char_at_5], 1=[char_at_1]} [2021-06-05 22:18:12,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:12,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:12,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:12,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:12,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:12,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:12,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,029 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-06-05 22:18:13,030 INFO L628 ElimStorePlain]: treesize reduction 1014, result has 28.7 percent of original size [2021-06-05 22:18:13,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:13,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,296 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 22:18:13,296 INFO L628 ElimStorePlain]: treesize reduction 38, result has 90.4 percent of original size [2021-06-05 22:18:13,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:13,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:13,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:13,308 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:13,311 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:13,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:13,317 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:13,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:13,323 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,426 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-06-05 22:18:13,426 INFO L628 ElimStorePlain]: treesize reduction 102, result has 55.5 percent of original size [2021-06-05 22:18:13,426 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:18:13,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:13,430 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:13,433 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:13,436 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:13,439 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:13,441 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:13,485 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-06-05 22:18:13,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:18:13,486 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 6 variables, input treesize:1521, output treesize:35 [2021-06-05 22:18:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:13,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460728603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:13,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:13,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:18:13,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430889671] [2021-06-05 22:18:13,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:13,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:13,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:13,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:13,564 INFO L87 Difference]: Start difference. First operand 870 states and 2872 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:14,662 INFO L93 Difference]: Finished difference Result 1405 states and 4490 transitions. [2021-06-05 22:18:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:18:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:14,664 INFO L225 Difference]: With dead ends: 1405 [2021-06-05 22:18:14,664 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 22:18:14,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 840.0ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:18:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 22:18:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 851. [2021-06-05 22:18:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.28) internal successors, (2788), 850 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2788 transitions. [2021-06-05 22:18:14,674 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2788 transitions. Word has length 23 [2021-06-05 22:18:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:14,674 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2788 transitions. [2021-06-05 22:18:14,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2788 transitions. [2021-06-05 22:18:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:14,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:14,675 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:14,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10991 [2021-06-05 22:18:14,876 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:14,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1578486239, now seen corresponding path program 131 times [2021-06-05 22:18:14,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:14,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615473057] [2021-06-05 22:18:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:14,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:14,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615473057] [2021-06-05 22:18:14,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615473057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:14,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196236143] [2021-06-05 22:18:14,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:15,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:18:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:18:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:16,353 INFO L446 ElimStorePlain]: Different costs {0=[char_at_1], 1=[char_at_5]} [2021-06-05 22:18:16,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:16,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,401 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,408 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,416 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:16,424 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,432 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,441 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:16,449 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,458 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,465 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,474 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,481 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,489 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,496 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,503 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,510 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,517 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,535 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,542 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,548 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,556 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,563 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,571 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,579 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,585 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,592 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,599 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,607 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,615 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,622 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,630 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,638 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,644 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,651 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,659 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,666 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,672 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,688 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,695 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:16,703 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,711 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,719 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,726 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,735 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,742 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,748 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,748 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,755 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,762 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,768 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,774 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,781 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,787 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,795 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,801 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,807 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:16,814 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,821 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,828 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,834 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,841 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,848 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:16,854 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,860 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,866 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,873 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,879 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,885 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,891 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,898 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:16,905 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,915 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,921 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,928 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,934 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,940 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,945 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,952 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,958 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:16,964 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,971 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,976 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,982 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,988 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,994 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:16,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:16,999 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,005 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,010 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,016 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,021 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:17,027 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,033 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:17,039 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,045 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,051 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,057 INFO L550 ElimStorePlain]: Start of recursive call 100: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,062 INFO L550 ElimStorePlain]: Start of recursive call 101: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,067 INFO L550 ElimStorePlain]: Start of recursive call 102: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,072 INFO L550 ElimStorePlain]: Start of recursive call 103: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,077 INFO L550 ElimStorePlain]: Start of recursive call 104: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,082 INFO L550 ElimStorePlain]: Start of recursive call 105: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,088 INFO L550 ElimStorePlain]: Start of recursive call 106: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,093 INFO L550 ElimStorePlain]: Start of recursive call 107: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,098 INFO L550 ElimStorePlain]: Start of recursive call 108: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,103 INFO L550 ElimStorePlain]: Start of recursive call 109: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,108 INFO L550 ElimStorePlain]: Start of recursive call 110: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,112 INFO L550 ElimStorePlain]: Start of recursive call 111: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,117 INFO L550 ElimStorePlain]: Start of recursive call 112: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,121 INFO L550 ElimStorePlain]: Start of recursive call 113: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,126 INFO L550 ElimStorePlain]: Start of recursive call 114: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,131 INFO L550 ElimStorePlain]: Start of recursive call 115: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,136 INFO L550 ElimStorePlain]: Start of recursive call 116: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,141 INFO L550 ElimStorePlain]: Start of recursive call 117: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,145 INFO L550 ElimStorePlain]: Start of recursive call 118: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,150 INFO L550 ElimStorePlain]: Start of recursive call 119: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,155 INFO L550 ElimStorePlain]: Start of recursive call 120: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,160 INFO L550 ElimStorePlain]: Start of recursive call 121: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,164 INFO L550 ElimStorePlain]: Start of recursive call 122: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,169 INFO L550 ElimStorePlain]: Start of recursive call 123: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,173 INFO L550 ElimStorePlain]: Start of recursive call 124: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,177 INFO L550 ElimStorePlain]: Start of recursive call 125: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,181 INFO L550 ElimStorePlain]: Start of recursive call 126: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,185 INFO L550 ElimStorePlain]: Start of recursive call 127: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,189 INFO L550 ElimStorePlain]: Start of recursive call 128: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,193 INFO L550 ElimStorePlain]: Start of recursive call 129: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,198 INFO L550 ElimStorePlain]: Start of recursive call 130: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,201 INFO L550 ElimStorePlain]: Start of recursive call 131: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,389 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 22:18:17,390 INFO L628 ElimStorePlain]: treesize reduction 227, result has 51.8 percent of original size [2021-06-05 22:18:17,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:17,395 INFO L550 ElimStorePlain]: Start of recursive call 132: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:17,398 INFO L550 ElimStorePlain]: Start of recursive call 133: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,402 INFO L550 ElimStorePlain]: Start of recursive call 134: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:17,405 INFO L550 ElimStorePlain]: Start of recursive call 135: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:17,409 INFO L550 ElimStorePlain]: Start of recursive call 136: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:17,412 INFO L550 ElimStorePlain]: Start of recursive call 137: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,415 INFO L550 ElimStorePlain]: Start of recursive call 138: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,418 INFO L550 ElimStorePlain]: Start of recursive call 139: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:17,421 INFO L550 ElimStorePlain]: Start of recursive call 140: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:17,501 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 22:18:17,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:18:17,502 INFO L247 ElimStorePlain]: Needed 140 recursive calls to eliminate 3 variables, input treesize:5340, output treesize:67 [2021-06-05 22:18:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:17,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196236143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:17,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:17,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:18:17,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440092308] [2021-06-05 22:18:17,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:18:17,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:17,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:18:17,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:18:17,605 INFO L87 Difference]: Start difference. First operand 851 states and 2788 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:18,067 INFO L93 Difference]: Finished difference Result 1191 states and 3786 transitions. [2021-06-05 22:18:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:18:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:18,068 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 22:18:18,068 INFO L226 Difference]: Without dead ends: 1083 [2021-06-05 22:18:18,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:18:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-06-05 22:18:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 828. [2021-06-05 22:18:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.2732769044740024) internal successors, (2707), 827 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2707 transitions. [2021-06-05 22:18:18,077 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2707 transitions. Word has length 23 [2021-06-05 22:18:18,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:18,077 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2707 transitions. [2021-06-05 22:18:18,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2707 transitions. [2021-06-05 22:18:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:18,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:18,078 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:18,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11385 [2021-06-05 22:18:18,279 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash 118758705, now seen corresponding path program 132 times [2021-06-05 22:18:18,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:18,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373063266] [2021-06-05 22:18:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:18,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:18,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373063266] [2021-06-05 22:18:18,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373063266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:18,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689403340] [2021-06-05 22:18:18,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:18,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:18:18,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:18,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:18,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:18,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:18,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:18,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:18,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:18,654 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-06-05 22:18:18,654 INFO L628 ElimStorePlain]: treesize reduction 86, result has 65.7 percent of original size [2021-06-05 22:18:18,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:18,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:18,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:18,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:18,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:18,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:18,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:18,681 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:18,725 INFO L628 ElimStorePlain]: treesize reduction 46, result has 56.2 percent of original size [2021-06-05 22:18:18,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:18:18,726 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:287, output treesize:51 [2021-06-05 22:18:24,037 WARN L205 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 134 DAG size of output: 81 [2021-06-05 22:18:24,653 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-05 22:18:24,985 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 50 [2021-06-05 22:18:25,147 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 81 [2021-06-05 22:18:26,235 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2021-06-05 22:18:27,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:18:27,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:27,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:18:27,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:27,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:27,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:27,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:18:27,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:18:27,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:27,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:27,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:27,244 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-06-05 22:18:27,245 INFO L628 ElimStorePlain]: treesize reduction 171, result has 38.7 percent of original size [2021-06-05 22:18:27,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:27,248 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:27,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:27,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:27,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:27,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:18:27,293 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:429, output treesize:47 [2021-06-05 22:18:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689403340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:27,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:27,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:18:27,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876461341] [2021-06-05 22:18:27,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:27,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:27,389 INFO L87 Difference]: Start difference. First operand 828 states and 2707 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:28,641 INFO L93 Difference]: Finished difference Result 1498 states and 4625 transitions. [2021-06-05 22:18:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:18:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:28,643 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 22:18:28,643 INFO L226 Difference]: Without dead ends: 1330 [2021-06-05 22:18:28,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 943.3ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:18:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-06-05 22:18:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 815. [2021-06-05 22:18:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.2874692874692877) internal successors, (2676), 814 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2676 transitions. [2021-06-05 22:18:28,653 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2676 transitions. Word has length 23 [2021-06-05 22:18:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:28,653 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2676 transitions. [2021-06-05 22:18:28,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2676 transitions. [2021-06-05 22:18:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:28,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:28,654 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:28,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11813,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:28,855 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:28,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1050792995, now seen corresponding path program 133 times [2021-06-05 22:18:28,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:28,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235572028] [2021-06-05 22:18:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:28,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:28,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235572028] [2021-06-05 22:18:28,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235572028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:28,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142506070] [2021-06-05 22:18:28,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:29,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:29,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:29,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:29,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,174 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,177 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:29,180 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,183 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,186 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,189 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,192 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:29,195 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,198 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,201 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,204 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:29,206 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,287 INFO L628 ElimStorePlain]: treesize reduction 32, result has 77.3 percent of original size [2021-06-05 22:18:29,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:18:29,290 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:622, output treesize:101 [2021-06-05 22:18:29,923 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_282, v_prenex_283, v_prenex_284, v_prenex_285, char_at_5], 1=[char_at_1]} [2021-06-05 22:18:29,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:29,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:29,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:29,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,178 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 22:18:30,178 INFO L628 ElimStorePlain]: treesize reduction 408, result has 45.1 percent of original size [2021-06-05 22:18:30,178 INFO L518 ElimStorePlain]: Eliminatee v_prenex_283 vanished before elimination [2021-06-05 22:18:30,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:30,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:30,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,376 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 22:18:30,376 INFO L628 ElimStorePlain]: treesize reduction 24, result has 92.3 percent of original size [2021-06-05 22:18:30,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:30,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:30,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:30,387 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:30,390 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,511 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:18:30,511 INFO L628 ElimStorePlain]: treesize reduction 46, result has 79.7 percent of original size [2021-06-05 22:18:30,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:30,515 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:30,518 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,590 INFO L628 ElimStorePlain]: treesize reduction 60, result has 61.8 percent of original size [2021-06-05 22:18:30,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:30,593 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:30,596 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:30,598 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:30,629 INFO L628 ElimStorePlain]: treesize reduction 18, result has 70.0 percent of original size [2021-06-05 22:18:30,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:18:30,630 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 8 variables, input treesize:753, output treesize:20 [2021-06-05 22:18:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:30,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142506070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:30,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:30,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-06-05 22:18:30,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885041685] [2021-06-05 22:18:30,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:18:30,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:18:30,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:18:30,682 INFO L87 Difference]: Start difference. First operand 815 states and 2676 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:31,125 INFO L93 Difference]: Finished difference Result 1043 states and 3361 transitions. [2021-06-05 22:18:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:31,126 INFO L225 Difference]: With dead ends: 1043 [2021-06-05 22:18:31,126 INFO L226 Difference]: Without dead ends: 998 [2021-06-05 22:18:31,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:18:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-05 22:18:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 811. [2021-06-05 22:18:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.3) internal successors, (2673), 810 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2673 transitions. [2021-06-05 22:18:31,135 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2673 transitions. Word has length 23 [2021-06-05 22:18:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:31,135 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2673 transitions. [2021-06-05 22:18:31,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2673 transitions. [2021-06-05 22:18:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:31,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:31,136 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:31,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12100,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:31,336 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1980897987, now seen corresponding path program 134 times [2021-06-05 22:18:31,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:31,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294879443] [2021-06-05 22:18:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:31,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:31,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294879443] [2021-06-05 22:18:31,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294879443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:31,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989113074] [2021-06-05 22:18:31,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:31,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:31,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:31,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:31,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:31,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:31,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:31,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:31,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:31,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:31,667 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:31,670 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:31,673 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:31,676 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:31,679 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:31,682 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:31,684 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,782 INFO L628 ElimStorePlain]: treesize reduction 36, result has 79.4 percent of original size [2021-06-05 22:18:31,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-06-05 22:18:31,785 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:507, output treesize:139 [2021-06-05 22:18:33,753 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_290, v_prenex_291, v_prenex_292, v_prenex_293, char_at_5], 15=[char_at_1]} [2021-06-05 22:18:33,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:33,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:33,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:33,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:33,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:33,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:33,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:33,803 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:33,810 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:33,817 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:33,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:33,823 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:34,403 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 91 [2021-06-05 22:18:34,403 INFO L628 ElimStorePlain]: treesize reduction 1274, result has 31.2 percent of original size [2021-06-05 22:18:34,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:34,408 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:34,818 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-05 22:18:34,818 INFO L628 ElimStorePlain]: treesize reduction 51, result has 91.1 percent of original size [2021-06-05 22:18:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:34,823 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,188 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-05 22:18:35,189 INFO L628 ElimStorePlain]: treesize reduction 46, result has 91.0 percent of original size [2021-06-05 22:18:35,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_293 vanished before elimination [2021-06-05 22:18:35,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:35,194 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:35,198 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:35,202 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:35,207 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:35,211 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:35,216 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:35,219 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:35,223 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,362 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 22:18:35,362 INFO L628 ElimStorePlain]: treesize reduction 134, result has 55.5 percent of original size [2021-06-05 22:18:35,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:35,366 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:35,371 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:35,375 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:35,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:35,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:35,379 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:35,383 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:35,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:35,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:18:35,433 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 12 variables, input treesize:2223, output treesize:36 [2021-06-05 22:18:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:35,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989113074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:35,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:35,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-06-05 22:18:35,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197117188] [2021-06-05 22:18:35,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:18:35,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:35,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:18:35,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:18:35,540 INFO L87 Difference]: Start difference. First operand 811 states and 2673 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:36,192 INFO L93 Difference]: Finished difference Result 1211 states and 3860 transitions. [2021-06-05 22:18:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:18:36,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:36,194 INFO L225 Difference]: With dead ends: 1211 [2021-06-05 22:18:36,194 INFO L226 Difference]: Without dead ends: 1121 [2021-06-05 22:18:36,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 695.1ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:18:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-05 22:18:36,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 784. [2021-06-05 22:18:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.286079182630907) internal successors, (2573), 783 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2573 transitions. [2021-06-05 22:18:36,203 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2573 transitions. Word has length 23 [2021-06-05 22:18:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:36,203 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2573 transitions. [2021-06-05 22:18:36,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:36,203 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2573 transitions. [2021-06-05 22:18:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:36,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:36,204 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:36,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12298,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:36,404 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:36,405 INFO L82 PathProgramCache]: Analyzing trace with hash 377423683, now seen corresponding path program 135 times [2021-06-05 22:18:36,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:36,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339577288] [2021-06-05 22:18:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:36,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:36,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339577288] [2021-06-05 22:18:36,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339577288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:36,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107714331] [2021-06-05 22:18:36,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:36,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:18:36,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:36,774 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2021-06-05 22:18:37,058 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 51 [2021-06-05 22:18:37,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:37,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:37,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:37,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,307 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:37,311 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,315 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,318 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,322 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:37,325 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:37,329 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,333 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,336 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,339 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,342 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,345 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,349 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,352 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,355 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,358 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,361 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,364 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,367 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,370 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,373 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,376 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,379 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:37,382 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,385 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:37,388 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,391 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,394 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:37,396 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:37,472 INFO L628 ElimStorePlain]: treesize reduction 56, result has 63.4 percent of original size [2021-06-05 22:18:37,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:18:37,475 INFO L247 ElimStorePlain]: Needed 36 recursive calls to eliminate 2 variables, input treesize:1222, output treesize:89 [2021-06-05 22:18:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:38,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107714331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:38,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:38,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:18:38,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140879481] [2021-06-05 22:18:38,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:18:38,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:18:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:18:38,053 INFO L87 Difference]: Start difference. First operand 784 states and 2573 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:38,221 INFO L93 Difference]: Finished difference Result 950 states and 3007 transitions. [2021-06-05 22:18:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:18:38,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:38,223 INFO L225 Difference]: With dead ends: 950 [2021-06-05 22:18:38,223 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 22:18:38,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:18:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 22:18:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 761. [2021-06-05 22:18:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.278947368421053) internal successors, (2492), 760 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2492 transitions. [2021-06-05 22:18:38,232 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2492 transitions. Word has length 23 [2021-06-05 22:18:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:38,232 INFO L482 AbstractCegarLoop]: Abstraction has 761 states and 2492 transitions. [2021-06-05 22:18:38,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2492 transitions. [2021-06-05 22:18:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:38,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:38,233 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:38,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12911 [2021-06-05 22:18:38,450 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1497358749, now seen corresponding path program 136 times [2021-06-05 22:18:38,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:38,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381266875] [2021-06-05 22:18:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:38,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:38,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381266875] [2021-06-05 22:18:38,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381266875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:38,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671624618] [2021-06-05 22:18:38,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:38,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:38,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:38,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:38,863 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-06-05 22:18:38,863 INFO L628 ElimStorePlain]: treesize reduction 388, result has 29.8 percent of original size [2021-06-05 22:18:38,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:38,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:38,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:38,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:38,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:38,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:38,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:38,874 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:38,919 INFO L628 ElimStorePlain]: treesize reduction 46, result has 56.2 percent of original size [2021-06-05 22:18:38,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:18:38,921 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:565, output treesize:51 [2021-06-05 22:18:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:39,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671624618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:39,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:39,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:18:39,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502953057] [2021-06-05 22:18:39,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:39,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:39,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:39,815 INFO L87 Difference]: Start difference. First operand 761 states and 2492 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:42,145 INFO L93 Difference]: Finished difference Result 1534 states and 4733 transitions. [2021-06-05 22:18:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:18:42,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:42,147 INFO L225 Difference]: With dead ends: 1534 [2021-06-05 22:18:42,147 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 22:18:42,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1856.2ms TimeCoverageRelationStatistics Valid=307, Invalid=2243, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:18:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 22:18:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 760. [2021-06-05 22:18:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.2582345191040845) internal successors, (2473), 759 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:42,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2473 transitions. [2021-06-05 22:18:42,157 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2473 transitions. Word has length 23 [2021-06-05 22:18:42,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:42,157 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2473 transitions. [2021-06-05 22:18:42,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2473 transitions. [2021-06-05 22:18:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:42,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:42,158 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:42,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12988 [2021-06-05 22:18:42,358 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:42,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1405408099, now seen corresponding path program 137 times [2021-06-05 22:18:42,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:42,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840437108] [2021-06-05 22:18:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:42,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:42,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840437108] [2021-06-05 22:18:42,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840437108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:42,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170634176] [2021-06-05 22:18:42,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:42,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:18:42,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:42,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:42,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:42,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:42,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:42,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:42,686 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:42,689 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,692 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:42,695 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:42,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:42,701 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,704 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,706 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,709 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:42,712 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:42,715 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:42,787 INFO L628 ElimStorePlain]: treesize reduction 62, result has 61.0 percent of original size [2021-06-05 22:18:42,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:18:42,790 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:566, output treesize:89 [2021-06-05 22:18:43,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:43,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:43,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:18:43,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:43,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:43,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:43,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:18:43,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:43,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:43,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:43,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:43,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:43,870 INFO L628 ElimStorePlain]: treesize reduction 240, result has 26.6 percent of original size [2021-06-05 22:18:43,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:43,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:43,874 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:43,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:43,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:43,904 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:43,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:43,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:18:43,941 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:440, output treesize:37 [2021-06-05 22:18:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:44,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170634176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:44,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:44,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:18:44,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232275782] [2021-06-05 22:18:44,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:44,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:44,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:44,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:44,049 INFO L87 Difference]: Start difference. First operand 760 states and 2473 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:44,508 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-06-05 22:18:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:46,910 INFO L93 Difference]: Finished difference Result 1487 states and 4526 transitions. [2021-06-05 22:18:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:18:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:46,912 INFO L225 Difference]: With dead ends: 1487 [2021-06-05 22:18:46,912 INFO L226 Difference]: Without dead ends: 1323 [2021-06-05 22:18:46,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 2412.0ms TimeCoverageRelationStatistics Valid=294, Invalid=2358, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:18:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-06-05 22:18:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 785. [2021-06-05 22:18:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.2831632653061225) internal successors, (2574), 784 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2574 transitions. [2021-06-05 22:18:46,922 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2574 transitions. Word has length 23 [2021-06-05 22:18:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:46,922 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2574 transitions. [2021-06-05 22:18:46,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2574 transitions. [2021-06-05 22:18:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:46,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:46,923 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:47,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13250,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:47,124 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:47,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1056542685, now seen corresponding path program 138 times [2021-06-05 22:18:47,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:47,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377617676] [2021-06-05 22:18:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:47,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:47,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377617676] [2021-06-05 22:18:47,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377617676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:47,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284835071] [2021-06-05 22:18:47,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:47,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:18:47,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:47,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:47,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:47,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:47,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:47,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:47,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:47,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:47,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:47,507 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:47,510 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:47,513 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:47,516 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:47,519 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:47,522 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:47,524 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:47,636 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-06-05 22:18:47,636 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.8 percent of original size [2021-06-05 22:18:47,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:18:47,639 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:465, output treesize:89 [2021-06-05 22:18:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:48,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284835071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:48,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:48,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:18:48,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987476661] [2021-06-05 22:18:48,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:18:48,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:48,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:18:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:18:48,149 INFO L87 Difference]: Start difference. First operand 785 states and 2574 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:48,523 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 22:18:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:48,562 INFO L93 Difference]: Finished difference Result 990 states and 3120 transitions. [2021-06-05 22:18:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:18:48,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:48,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:48,564 INFO L225 Difference]: With dead ends: 990 [2021-06-05 22:18:48,564 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 22:18:48,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 520.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 22:18:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 762. [2021-06-05 22:18:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.266754270696452) internal successors, (2486), 761 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2486 transitions. [2021-06-05 22:18:48,571 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2486 transitions. Word has length 23 [2021-06-05 22:18:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:48,572 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2486 transitions. [2021-06-05 22:18:48,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2486 transitions. [2021-06-05 22:18:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:48,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:48,572 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:48,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13620 [2021-06-05 22:18:48,773 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1699643171, now seen corresponding path program 139 times [2021-06-05 22:18:48,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:48,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148460904] [2021-06-05 22:18:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:48,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:48,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148460904] [2021-06-05 22:18:48,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148460904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:48,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264624926] [2021-06-05 22:18:48,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:48,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:49,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:49,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:49,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:49,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,054 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,057 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:49,061 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:49,064 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:49,068 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,071 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,074 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,077 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,080 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,083 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,086 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,089 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,092 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,094 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,160 INFO L628 ElimStorePlain]: treesize reduction 58, result has 61.1 percent of original size [2021-06-05 22:18:49,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:49,163 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,204 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.7 percent of original size [2021-06-05 22:18:49,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:18:49,206 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 3 variables, input treesize:603, output treesize:51 [2021-06-05 22:18:49,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:49,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:18:49,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:18:49,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:49,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:18:49,928 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:49,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:49,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:18:49,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:50,044 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-06-05 22:18:50,045 INFO L628 ElimStorePlain]: treesize reduction 171, result has 38.7 percent of original size [2021-06-05 22:18:50,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:50,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:50,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:50,051 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:50,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:50,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:18:50,093 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:429, output treesize:47 [2021-06-05 22:18:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:50,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264624926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:50,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:50,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 22:18:50,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159549034] [2021-06-05 22:18:50,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:50,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:50,202 INFO L87 Difference]: Start difference. First operand 762 states and 2486 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:51,255 INFO L93 Difference]: Finished difference Result 1161 states and 3663 transitions. [2021-06-05 22:18:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:18:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:51,257 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 22:18:51,257 INFO L226 Difference]: Without dead ends: 1077 [2021-06-05 22:18:51,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 934.1ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:18:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-06-05 22:18:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 720. [2021-06-05 22:18:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.2336578581363002) internal successors, (2325), 719 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2325 transitions. [2021-06-05 22:18:51,265 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2325 transitions. Word has length 23 [2021-06-05 22:18:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:51,265 INFO L482 AbstractCegarLoop]: Abstraction has 720 states and 2325 transitions. [2021-06-05 22:18:51,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2325 transitions. [2021-06-05 22:18:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:51,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:51,266 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:51,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13770,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:51,473 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:51,473 INFO L82 PathProgramCache]: Analyzing trace with hash 959564321, now seen corresponding path program 140 times [2021-06-05 22:18:51,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:51,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985125498] [2021-06-05 22:18:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:51,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:51,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985125498] [2021-06-05 22:18:51,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985125498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:51,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118274049] [2021-06-05 22:18:51,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:51,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:51,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:51,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:51,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:51,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:18:51,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:51,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:51,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:51,954 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,957 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:51,961 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:51,964 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,971 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,974 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,977 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,980 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,983 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,987 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,990 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,993 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,996 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:51,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:51,999 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:52,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:52,001 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:52,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:52,004 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:52,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:52,007 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:52,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:52,010 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:52,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:52,013 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:52,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:52,015 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:52,103 INFO L628 ElimStorePlain]: treesize reduction 60, result has 67.7 percent of original size [2021-06-05 22:18:52,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-06-05 22:18:52,106 INFO L247 ElimStorePlain]: Needed 30 recursive calls to eliminate 2 variables, input treesize:991, output treesize:126 [2021-06-05 22:18:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:52,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118274049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:52,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:52,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 22:18:52,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726112658] [2021-06-05 22:18:52,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:18:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:18:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:52,555 INFO L87 Difference]: Start difference. First operand 720 states and 2325 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:53,137 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 22:18:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:53,642 INFO L93 Difference]: Finished difference Result 952 states and 2961 transitions. [2021-06-05 22:18:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:18:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:53,643 INFO L225 Difference]: With dead ends: 952 [2021-06-05 22:18:53,643 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 22:18:53,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1000.7ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:18:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 22:18:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 703. [2021-06-05 22:18:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.2222222222222223) internal successors, (2262), 702 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2262 transitions. [2021-06-05 22:18:53,651 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2262 transitions. Word has length 23 [2021-06-05 22:18:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:53,651 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2262 transitions. [2021-06-05 22:18:53,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2262 transitions. [2021-06-05 22:18:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:53,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:53,652 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:53,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13996 [2021-06-05 22:18:53,852 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2063167747, now seen corresponding path program 141 times [2021-06-05 22:18:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:53,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199636674] [2021-06-05 22:18:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:54,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:54,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199636674] [2021-06-05 22:18:54,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199636674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:54,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574586194] [2021-06-05 22:18:54,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:54,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:18:54,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:54,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574586194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:54,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:54,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:18:54,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598635603] [2021-06-05 22:18:54,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:18:54,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:18:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:18:54,400 INFO L87 Difference]: Start difference. First operand 703 states and 2262 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:56,172 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-05 22:18:56,305 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 22:18:56,593 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 22:18:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:58,231 INFO L93 Difference]: Finished difference Result 1420 states and 4236 transitions. [2021-06-05 22:18:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:18:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:18:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:58,233 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 22:18:58,233 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 22:18:58,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3185.1ms TimeCoverageRelationStatistics Valid=416, Invalid=3244, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:18:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 22:18:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 738. [2021-06-05 22:18:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.208955223880597) internal successors, (2365), 737 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2365 transitions. [2021-06-05 22:18:58,242 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2365 transitions. Word has length 23 [2021-06-05 22:18:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:58,242 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2365 transitions. [2021-06-05 22:18:58,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2365 transitions. [2021-06-05 22:18:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:18:58,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:58,243 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:58,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14104 [2021-06-05 22:18:58,443 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:58,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:58,444 INFO L82 PathProgramCache]: Analyzing trace with hash -338062333, now seen corresponding path program 142 times [2021-06-05 22:18:58,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:58,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272181203] [2021-06-05 22:18:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:18:58,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:58,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272181203] [2021-06-05 22:18:58,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272181203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:58,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452284519] [2021-06-05 22:18:58,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:58,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:58,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:58,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:18:58,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:58,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:58,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:58,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:58,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,906 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:18:58,909 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:58,913 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,916 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,922 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:18:58,925 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,928 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,931 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:58,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:18:58,933 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:59,015 INFO L628 ElimStorePlain]: treesize reduction 66, result has 62.3 percent of original size [2021-06-05 22:18:59,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:18:59,018 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:582, output treesize:101 [2021-06-05 22:19:00,221 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 22:19:00,503 INFO L446 ElimStorePlain]: Different costs {0=[char_at_5, v_prenex_313], 6=[char_at_1]} [2021-06-05 22:19:00,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:00,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:00,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:00,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:00,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:00,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:00,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:00,541 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:00,547 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:00,552 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:00,557 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:00,562 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:00,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:00,567 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,021 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-06-05 22:19:01,021 INFO L628 ElimStorePlain]: treesize reduction 834, result has 34.7 percent of original size [2021-06-05 22:19:01,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:01,026 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:01,030 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:01,034 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:01,038 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:01,042 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:01,046 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:01,050 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:01,054 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,197 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 22:19:01,197 INFO L628 ElimStorePlain]: treesize reduction 120, result has 59.3 percent of original size [2021-06-05 22:19:01,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:01,201 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:01,205 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:01,209 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:01,212 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:01,215 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:01,292 INFO L628 ElimStorePlain]: treesize reduction 22, result has 82.3 percent of original size [2021-06-05 22:19:01,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:19:01,294 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 7 variables, input treesize:1685, output treesize:37 [2021-06-05 22:19:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:01,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452284519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:01,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:01,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:19:01,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705958601] [2021-06-05 22:19:01,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:19:01,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:19:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:19:01,391 INFO L87 Difference]: Start difference. First operand 738 states and 2365 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:01,937 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 22:19:02,186 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 22:19:02,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:02,186 INFO L93 Difference]: Finished difference Result 1213 states and 3724 transitions. [2021-06-05 22:19:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:19:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:19:02,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:02,188 INFO L225 Difference]: With dead ends: 1213 [2021-06-05 22:19:02,188 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:19:02,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 875.6ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:19:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:19:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 732. [2021-06-05 22:19:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.216142270861833) internal successors, (2351), 731 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2351 transitions. [2021-06-05 22:19:02,196 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2351 transitions. Word has length 23 [2021-06-05 22:19:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:02,196 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 2351 transitions. [2021-06-05 22:19:02,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2351 transitions. [2021-06-05 22:19:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:19:02,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:02,197 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:02,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14113,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:02,398 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash -135681423, now seen corresponding path program 143 times [2021-06-05 22:19:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:02,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288832653] [2021-06-05 22:19:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:02,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:02,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288832653] [2021-06-05 22:19:02,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288832653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:02,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358955816] [2021-06-05 22:19:02,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:02,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:02,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:19:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:02,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358955816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:02,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:02,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:19:02,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485100961] [2021-06-05 22:19:02,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:02,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:02,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:02,836 INFO L87 Difference]: Start difference. First operand 732 states and 2351 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:04,803 INFO L93 Difference]: Finished difference Result 1488 states and 4475 transitions. [2021-06-05 22:19:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:19:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:19:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:04,805 INFO L225 Difference]: With dead ends: 1488 [2021-06-05 22:19:04,805 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 22:19:04,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1698.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:19:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 22:19:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 722. [2021-06-05 22:19:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 3.176144244105409) internal successors, (2290), 721 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2290 transitions. [2021-06-05 22:19:04,815 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2290 transitions. Word has length 23 [2021-06-05 22:19:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:04,815 INFO L482 AbstractCegarLoop]: Abstraction has 722 states and 2290 transitions. [2021-06-05 22:19:04,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2290 transitions. [2021-06-05 22:19:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:19:04,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:04,816 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:05,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14287 [2021-06-05 22:19:05,016 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:05,016 INFO L82 PathProgramCache]: Analyzing trace with hash -52595829, now seen corresponding path program 144 times [2021-06-05 22:19:05,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:05,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599334865] [2021-06-05 22:19:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:05,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:05,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599334865] [2021-06-05 22:19:05,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599334865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:05,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934619211] [2021-06-05 22:19:05,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:05,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:19:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:05,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:19:05,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:05,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:05,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:05,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:05,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:05,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,280 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:05,284 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,286 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,289 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,292 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,295 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,298 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,300 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,303 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,305 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:05,307 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:05,368 INFO L628 ElimStorePlain]: treesize reduction 28, result has 75.2 percent of original size [2021-06-05 22:19:05,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:19:05,371 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:497, output treesize:77 [2021-06-05 22:19:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:05,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934619211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:05,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:05,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:19:05,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089397216] [2021-06-05 22:19:05,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:19:05,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:05,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:19:05,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:19:05,723 INFO L87 Difference]: Start difference. First operand 722 states and 2290 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:06,050 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 22:19:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:06,419 INFO L93 Difference]: Finished difference Result 1075 states and 3258 transitions. [2021-06-05 22:19:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:19:06,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:19:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:06,420 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 22:19:06,420 INFO L226 Difference]: Without dead ends: 1021 [2021-06-05 22:19:06,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 775.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:19:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-05 22:19:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 729. [2021-06-05 22:19:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.184065934065934) internal successors, (2318), 728 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2318 transitions. [2021-06-05 22:19:06,428 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2318 transitions. Word has length 23 [2021-06-05 22:19:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:06,429 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2318 transitions. [2021-06-05 22:19:06,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2318 transitions. [2021-06-05 22:19:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:19:06,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:06,429 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:06,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14298,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:06,630 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:06,630 INFO L82 PathProgramCache]: Analyzing trace with hash 305652849, now seen corresponding path program 145 times [2021-06-05 22:19:06,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:06,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567582091] [2021-06-05 22:19:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:06,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:06,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567582091] [2021-06-05 22:19:06,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567582091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:06,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191374334] [2021-06-05 22:19:06,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:06,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:19:06,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:06,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:06,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:06,975 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-06-05 22:19:06,975 INFO L628 ElimStorePlain]: treesize reduction 382, result has 27.4 percent of original size [2021-06-05 22:19:06,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:06,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:06,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:06,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:06,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:06,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:06,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:06,986 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:07,023 INFO L628 ElimStorePlain]: treesize reduction 40, result has 55.6 percent of original size [2021-06-05 22:19:07,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:19:07,025 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:538, output treesize:42 [2021-06-05 22:19:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:07,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191374334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:07,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:07,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 22:19:07,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575549598] [2021-06-05 22:19:07,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:19:07,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:07,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:19:07,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:19:07,130 INFO L87 Difference]: Start difference. First operand 729 states and 2318 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:07,847 INFO L93 Difference]: Finished difference Result 1136 states and 3466 transitions. [2021-06-05 22:19:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:19:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:19:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:07,848 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:19:07,848 INFO L226 Difference]: Without dead ends: 1085 [2021-06-05 22:19:07,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:19:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-06-05 22:19:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 747. [2021-06-05 22:19:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.148793565683646) internal successors, (2349), 746 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2349 transitions. [2021-06-05 22:19:07,857 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2349 transitions. Word has length 23 [2021-06-05 22:19:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:07,857 INFO L482 AbstractCegarLoop]: Abstraction has 747 states and 2349 transitions. [2021-06-05 22:19:07,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2349 transitions. [2021-06-05 22:19:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:07,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:07,858 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:08,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14351,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:08,073 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1353971042, now seen corresponding path program 146 times [2021-06-05 22:19:08,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:08,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260071592] [2021-06-05 22:19:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:19:08,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:08,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260071592] [2021-06-05 22:19:08,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260071592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:08,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284198642] [2021-06-05 22:19:08,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:08,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:08,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:08,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:19:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:08,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284198642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:08,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:08,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 22:19:08,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923610801] [2021-06-05 22:19:08,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:08,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:08,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:08,484 INFO L87 Difference]: Start difference. First operand 747 states and 2349 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:11,044 INFO L93 Difference]: Finished difference Result 1441 states and 4355 transitions. [2021-06-05 22:19:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:19:11,045 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:11,046 INFO L225 Difference]: With dead ends: 1441 [2021-06-05 22:19:11,046 INFO L226 Difference]: Without dead ends: 1375 [2021-06-05 22:19:11,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1724.8ms TimeCoverageRelationStatistics Valid=513, Invalid=4889, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:19:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-05 22:19:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 678. [2021-06-05 22:19:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.1285081240768093) internal successors, (2118), 677 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2118 transitions. [2021-06-05 22:19:11,055 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2118 transitions. Word has length 24 [2021-06-05 22:19:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:11,055 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2118 transitions. [2021-06-05 22:19:11,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2118 transitions. [2021-06-05 22:19:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:11,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:11,056 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:11,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14379 [2021-06-05 22:19:11,256 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash 133364848, now seen corresponding path program 147 times [2021-06-05 22:19:11,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:11,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709910805] [2021-06-05 22:19:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:11,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:11,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709910805] [2021-06-05 22:19:11,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709910805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:11,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205507562] [2021-06-05 22:19:11,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:11,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:19:11,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:11,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:11,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:11,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:11,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:11,460 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 22:19:11,460 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:19:11,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:19:11,461 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:101, output treesize:45 [2021-06-05 22:19:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:11,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205507562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:11,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:11,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:19:11,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019080290] [2021-06-05 22:19:11,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:19:11,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:19:11,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:19:11,526 INFO L87 Difference]: Start difference. First operand 678 states and 2118 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:11,723 INFO L93 Difference]: Finished difference Result 884 states and 2727 transitions. [2021-06-05 22:19:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:19:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:11,724 INFO L225 Difference]: With dead ends: 884 [2021-06-05 22:19:11,724 INFO L226 Difference]: Without dead ends: 833 [2021-06-05 22:19:11,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-06-05 22:19:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 720. [2021-06-05 22:19:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.148817802503477) internal successors, (2264), 719 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2264 transitions. [2021-06-05 22:19:11,731 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2264 transitions. Word has length 24 [2021-06-05 22:19:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:11,731 INFO L482 AbstractCegarLoop]: Abstraction has 720 states and 2264 transitions. [2021-06-05 22:19:11,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2264 transitions. [2021-06-05 22:19:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:11,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:11,732 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:11,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14383,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:11,932 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash -770708136, now seen corresponding path program 148 times [2021-06-05 22:19:11,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:11,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551516729] [2021-06-05 22:19:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:12,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551516729] [2021-06-05 22:19:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551516729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499403323] [2021-06-05 22:19:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:12,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:12,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:12,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:12,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:12,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499403323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:12,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:12,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:12,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658443337] [2021-06-05 22:19:12,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:12,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:12,340 INFO L87 Difference]: Start difference. First operand 720 states and 2264 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:14,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:14,566 INFO L93 Difference]: Finished difference Result 1345 states and 4051 transitions. [2021-06-05 22:19:14,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:19:14,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:14,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:14,568 INFO L225 Difference]: With dead ends: 1345 [2021-06-05 22:19:14,568 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 22:19:14,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1764.5ms TimeCoverageRelationStatistics Valid=422, Invalid=4000, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:19:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 22:19:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 732. [2021-06-05 22:19:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.161422708618331) internal successors, (2311), 731 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2311 transitions. [2021-06-05 22:19:14,577 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2311 transitions. Word has length 24 [2021-06-05 22:19:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:14,577 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 2311 transitions. [2021-06-05 22:19:14,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2311 transitions. [2021-06-05 22:19:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:14,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:14,578 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:14,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14393 [2021-06-05 22:19:14,778 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:14,779 INFO L82 PathProgramCache]: Analyzing trace with hash 206014102, now seen corresponding path program 149 times [2021-06-05 22:19:14,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:14,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885268424] [2021-06-05 22:19:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:14,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:14,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885268424] [2021-06-05 22:19:14,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885268424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:14,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794701182] [2021-06-05 22:19:14,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:14,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:19:14,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:14,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:15,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794701182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:15,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:15,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:15,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110154874] [2021-06-05 22:19:15,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:15,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:15,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:15,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:15,139 INFO L87 Difference]: Start difference. First operand 732 states and 2311 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:18,032 INFO L93 Difference]: Finished difference Result 1681 states and 5008 transitions. [2021-06-05 22:19:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:19:18,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:18,035 INFO L225 Difference]: With dead ends: 1681 [2021-06-05 22:19:18,035 INFO L226 Difference]: Without dead ends: 1562 [2021-06-05 22:19:18,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 2574.2ms TimeCoverageRelationStatistics Valid=729, Invalid=5913, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:19:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-06-05 22:19:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 762. [2021-06-05 22:19:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1773981603153745) internal successors, (2418), 761 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2418 transitions. [2021-06-05 22:19:18,045 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2418 transitions. Word has length 24 [2021-06-05 22:19:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:18,045 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2418 transitions. [2021-06-05 22:19:18,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2418 transitions. [2021-06-05 22:19:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:18,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:18,046 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:18,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14402 [2021-06-05 22:19:18,247 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1804683574, now seen corresponding path program 150 times [2021-06-05 22:19:18,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:18,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762412247] [2021-06-05 22:19:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:18,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:18,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762412247] [2021-06-05 22:19:18,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762412247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:18,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830706065] [2021-06-05 22:19:18,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:18,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:19:18,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:18,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:18,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:18,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:18,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:18,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:18,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:18,456 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 22:19:18,456 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:19:18,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:19:18,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:101, output treesize:45 [2021-06-05 22:19:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:18,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830706065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:18,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:18,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:19:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906163763] [2021-06-05 22:19:18,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:19:18,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:18,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:19:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:19:18,555 INFO L87 Difference]: Start difference. First operand 762 states and 2418 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:18,763 INFO L93 Difference]: Finished difference Result 972 states and 2995 transitions. [2021-06-05 22:19:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:19:18,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:18,765 INFO L225 Difference]: With dead ends: 972 [2021-06-05 22:19:18,765 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 22:19:18,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 22:19:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 731. [2021-06-05 22:19:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.1671232876712327) internal successors, (2312), 730 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2312 transitions. [2021-06-05 22:19:18,772 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2312 transitions. Word has length 24 [2021-06-05 22:19:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:18,772 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2312 transitions. [2021-06-05 22:19:18,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2312 transitions. [2021-06-05 22:19:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:18,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:18,773 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:18,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14411 [2021-06-05 22:19:18,974 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:18,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1059454840, now seen corresponding path program 151 times [2021-06-05 22:19:18,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:18,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396559071] [2021-06-05 22:19:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:19,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:19,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396559071] [2021-06-05 22:19:19,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396559071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:19,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455141683] [2021-06-05 22:19:19,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:19,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:19,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455141683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:19,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:19,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:19,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237490304] [2021-06-05 22:19:19,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:19,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:19,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:19,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:19,420 INFO L87 Difference]: Start difference. First operand 731 states and 2312 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:21,515 INFO L93 Difference]: Finished difference Result 1246 states and 3790 transitions. [2021-06-05 22:19:21,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:19:21,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:21,517 INFO L225 Difference]: With dead ends: 1246 [2021-06-05 22:19:21,517 INFO L226 Difference]: Without dead ends: 1149 [2021-06-05 22:19:21,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1655.5ms TimeCoverageRelationStatistics Valid=403, Invalid=3887, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:19:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-06-05 22:19:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 756. [2021-06-05 22:19:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.1801324503311257) internal successors, (2401), 755 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2401 transitions. [2021-06-05 22:19:21,526 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2401 transitions. Word has length 24 [2021-06-05 22:19:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:21,526 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2401 transitions. [2021-06-05 22:19:21,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2401 transitions. [2021-06-05 22:19:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:21,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:21,527 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:21,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14426 [2021-06-05 22:19:21,727 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2036177078, now seen corresponding path program 152 times [2021-06-05 22:19:21,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:21,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458485683] [2021-06-05 22:19:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:21,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458485683] [2021-06-05 22:19:21,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458485683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916611228] [2021-06-05 22:19:21,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:21,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:21,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:21,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:21,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:21,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:21,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:21,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:21,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:21,956 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:19:21,957 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:19:21,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:19:21,958 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:19:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:23,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916611228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:23,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:23,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-06-05 22:19:23,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254318568] [2021-06-05 22:19:23,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:19:23,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:23,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:19:23,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:19:23,146 INFO L87 Difference]: Start difference. First operand 756 states and 2401 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:23,691 INFO L93 Difference]: Finished difference Result 1241 states and 3792 transitions. [2021-06-05 22:19:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:19:23,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:23,693 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 22:19:23,693 INFO L226 Difference]: Without dead ends: 1127 [2021-06-05 22:19:23,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 572.3ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:19:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-05 22:19:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 786. [2021-06-05 22:19:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.1949044585987263) internal successors, (2508), 785 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2508 transitions. [2021-06-05 22:19:23,702 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2508 transitions. Word has length 24 [2021-06-05 22:19:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:23,702 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2508 transitions. [2021-06-05 22:19:23,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2508 transitions. [2021-06-05 22:19:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:23,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:23,703 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:23,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14432,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:23,905 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:23,905 INFO L82 PathProgramCache]: Analyzing trace with hash -660120746, now seen corresponding path program 153 times [2021-06-05 22:19:23,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:23,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696721600] [2021-06-05 22:19:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:24,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696721600] [2021-06-05 22:19:24,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696721600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440297045] [2021-06-05 22:19:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:24,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:19:24,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:24,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:24,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:24,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:24,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:24,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:24,127 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:19:24,127 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-05 22:19:24,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:19:24,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:19:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:24,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440297045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:24,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:24,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:19:24,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439370116] [2021-06-05 22:19:24,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:19:24,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:24,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:19:24,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:19:24,990 INFO L87 Difference]: Start difference. First operand 786 states and 2508 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:25,198 INFO L93 Difference]: Finished difference Result 976 states and 3040 transitions. [2021-06-05 22:19:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:19:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:25,200 INFO L225 Difference]: With dead ends: 976 [2021-06-05 22:19:25,200 INFO L226 Difference]: Without dead ends: 925 [2021-06-05 22:19:25,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 278.3ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-06-05 22:19:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 744. [2021-06-05 22:19:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.168236877523553) internal successors, (2354), 743 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2354 transitions. [2021-06-05 22:19:25,208 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2354 transitions. Word has length 24 [2021-06-05 22:19:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:25,208 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2354 transitions. [2021-06-05 22:19:25,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2354 transitions. [2021-06-05 22:19:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:25,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:25,209 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:25,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14893,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:25,409 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:25,409 INFO L82 PathProgramCache]: Analyzing trace with hash -790607696, now seen corresponding path program 154 times [2021-06-05 22:19:25,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:25,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414967931] [2021-06-05 22:19:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:25,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:25,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414967931] [2021-06-05 22:19:25,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414967931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:25,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006881614] [2021-06-05 22:19:25,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:25,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:25,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:25,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006881614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:25,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:25,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:25,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208478434] [2021-06-05 22:19:25,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:25,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:25,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:25,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:25,897 INFO L87 Difference]: Start difference. First operand 744 states and 2354 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:28,152 INFO L93 Difference]: Finished difference Result 1133 states and 3416 transitions. [2021-06-05 22:19:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:19:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:28,153 INFO L225 Difference]: With dead ends: 1133 [2021-06-05 22:19:28,153 INFO L226 Difference]: Without dead ends: 992 [2021-06-05 22:19:28,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1877.8ms TimeCoverageRelationStatistics Valid=345, Invalid=3561, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:19:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-05 22:19:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 757. [2021-06-05 22:19:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1693121693121693) internal successors, (2396), 756 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2396 transitions. [2021-06-05 22:19:28,162 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2396 transitions. Word has length 24 [2021-06-05 22:19:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:28,162 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2396 transitions. [2021-06-05 22:19:28,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2396 transitions. [2021-06-05 22:19:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:28,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:28,163 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:28,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15177,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:28,363 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1507016042, now seen corresponding path program 155 times [2021-06-05 22:19:28,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:28,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256580453] [2021-06-05 22:19:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:28,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:28,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256580453] [2021-06-05 22:19:28,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256580453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:28,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453325471] [2021-06-05 22:19:28,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:28,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:19:28,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:28,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:28,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453325471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:28,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:28,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-06-05 22:19:28,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11308592] [2021-06-05 22:19:28,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:19:28,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:19:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:19:28,893 INFO L87 Difference]: Start difference. First operand 757 states and 2396 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:29,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:29,323 INFO L93 Difference]: Finished difference Result 1198 states and 3678 transitions. [2021-06-05 22:19:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:19:29,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:29,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:29,325 INFO L225 Difference]: With dead ends: 1198 [2021-06-05 22:19:29,325 INFO L226 Difference]: Without dead ends: 1084 [2021-06-05 22:19:29,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:19:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-06-05 22:19:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 787. [2021-06-05 22:19:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1844783715012723) internal successors, (2503), 786 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2503 transitions. [2021-06-05 22:19:29,334 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2503 transitions. Word has length 24 [2021-06-05 22:19:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:29,334 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2503 transitions. [2021-06-05 22:19:29,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2503 transitions. [2021-06-05 22:19:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:29,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:29,335 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:29,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15185 [2021-06-05 22:19:29,536 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash 91653430, now seen corresponding path program 156 times [2021-06-05 22:19:29,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:29,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191496264] [2021-06-05 22:19:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:29,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:29,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191496264] [2021-06-05 22:19:29,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191496264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:29,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578910185] [2021-06-05 22:19:29,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:29,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:19:29,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:29,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:29,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578910185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:29,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:29,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:29,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679620147] [2021-06-05 22:19:29,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:29,973 INFO L87 Difference]: Start difference. First operand 787 states and 2503 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:32,176 INFO L93 Difference]: Finished difference Result 1227 states and 3713 transitions. [2021-06-05 22:19:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:19:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:32,177 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 22:19:32,177 INFO L226 Difference]: Without dead ends: 1130 [2021-06-05 22:19:32,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1796.5ms TimeCoverageRelationStatistics Valid=473, Invalid=4083, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:19:32,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-06-05 22:19:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 753. [2021-06-05 22:19:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.172872340425532) internal successors, (2386), 752 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2386 transitions. [2021-06-05 22:19:32,186 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2386 transitions. Word has length 24 [2021-06-05 22:19:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:32,186 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2386 transitions. [2021-06-05 22:19:32,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2386 transitions. [2021-06-05 22:19:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:32,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:32,187 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:32,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15264,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:32,388 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:32,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1959932248, now seen corresponding path program 157 times [2021-06-05 22:19:32,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:32,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785880606] [2021-06-05 22:19:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:32,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:32,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785880606] [2021-06-05 22:19:32,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785880606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:32,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855663061] [2021-06-05 22:19:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:32,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:32,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:32,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,596 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:19:32,597 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-06-05 22:19:32,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:19:32,598 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:19:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:32,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855663061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:32,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:32,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:19:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901463120] [2021-06-05 22:19:32,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:19:32,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:19:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:19:32,650 INFO L87 Difference]: Start difference. First operand 753 states and 2386 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:32,775 INFO L93 Difference]: Finished difference Result 950 states and 2972 transitions. [2021-06-05 22:19:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:19:32,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:32,776 INFO L225 Difference]: With dead ends: 950 [2021-06-05 22:19:32,776 INFO L226 Difference]: Without dead ends: 899 [2021-06-05 22:19:32,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:19:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-06-05 22:19:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 789. [2021-06-05 22:19:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.184010152284264) internal successors, (2509), 788 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2509 transitions. [2021-06-05 22:19:32,784 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2509 transitions. Word has length 24 [2021-06-05 22:19:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:32,784 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2509 transitions. [2021-06-05 22:19:32,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2509 transitions. [2021-06-05 22:19:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:32,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:32,785 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:32,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15269 [2021-06-05 22:19:32,988 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1358312810, now seen corresponding path program 158 times [2021-06-05 22:19:32,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:32,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636822297] [2021-06-05 22:19:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:33,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636822297] [2021-06-05 22:19:33,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636822297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209713674] [2021-06-05 22:19:33,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:33,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:33,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:33,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209713674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:33,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:33,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:33,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055126767] [2021-06-05 22:19:33,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:33,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:33,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:33,379 INFO L87 Difference]: Start difference. First operand 789 states and 2509 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:35,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:35,134 INFO L93 Difference]: Finished difference Result 1539 states and 4627 transitions. [2021-06-05 22:19:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:19:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:35,136 INFO L225 Difference]: With dead ends: 1539 [2021-06-05 22:19:35,136 INFO L226 Difference]: Without dead ends: 1420 [2021-06-05 22:19:35,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1333.0ms TimeCoverageRelationStatistics Valid=386, Invalid=3396, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:19:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-06-05 22:19:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 821. [2021-06-05 22:19:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.196341463414634) internal successors, (2621), 820 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2621 transitions. [2021-06-05 22:19:35,147 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2621 transitions. Word has length 24 [2021-06-05 22:19:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:35,147 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2621 transitions. [2021-06-05 22:19:35,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2621 transitions. [2021-06-05 22:19:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:35,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:35,149 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:35,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15278,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:35,353 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash 109869712, now seen corresponding path program 159 times [2021-06-05 22:19:35,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:35,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212532759] [2021-06-05 22:19:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:35,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:35,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212532759] [2021-06-05 22:19:35,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212532759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:35,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258348520] [2021-06-05 22:19:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:35,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:19:35,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258348520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:35,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:35,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:35,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305419952] [2021-06-05 22:19:35,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:35,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:35,808 INFO L87 Difference]: Start difference. First operand 821 states and 2621 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:37,914 INFO L93 Difference]: Finished difference Result 1228 states and 3747 transitions. [2021-06-05 22:19:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:19:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:37,916 INFO L225 Difference]: With dead ends: 1228 [2021-06-05 22:19:37,916 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 22:19:37,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1698.7ms TimeCoverageRelationStatistics Valid=362, Invalid=3544, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:19:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 22:19:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 835. [2021-06-05 22:19:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.197841726618705) internal successors, (2667), 834 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2667 transitions. [2021-06-05 22:19:37,925 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2667 transitions. Word has length 24 [2021-06-05 22:19:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:37,925 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2667 transitions. [2021-06-05 22:19:37,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2667 transitions. [2021-06-05 22:19:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:37,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:37,926 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:38,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15287,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:38,127 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:38,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:38,127 INFO L82 PathProgramCache]: Analyzing trace with hash -606538634, now seen corresponding path program 160 times [2021-06-05 22:19:38,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:38,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617943005] [2021-06-05 22:19:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:38,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:38,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617943005] [2021-06-05 22:19:38,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617943005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:38,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909185401] [2021-06-05 22:19:38,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:38,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:38,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:38,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:38,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:19:38,432 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,436 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:38,440 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:38,444 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,448 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,451 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,457 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,461 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,464 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,468 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,471 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,475 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,478 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,481 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,484 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,487 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,491 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,494 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,497 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,500 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:38,504 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,507 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,510 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,513 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,517 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:38,520 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,523 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,526 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,529 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,531 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,613 INFO L628 ElimStorePlain]: treesize reduction 32, result has 77.3 percent of original size [2021-06-05 22:19:38,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:19:38,616 INFO L247 ElimStorePlain]: Needed 38 recursive calls to eliminate 2 variables, input treesize:1429, output treesize:101 [2021-06-05 22:19:38,932 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_330, char_at_5], 6=[char_at_1]} [2021-06-05 22:19:38,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:38,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:38,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:38,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:38,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:39,096 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 22:19:39,096 INFO L628 ElimStorePlain]: treesize reduction 251, result has 34.1 percent of original size [2021-06-05 22:19:39,096 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:19:39,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:39,100 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:39,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:39,104 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:39,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:39,107 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:39,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:39,110 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:39,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:39,114 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:39,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:19:39,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:19:39,160 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:553, output treesize:33 [2021-06-05 22:19:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:39,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909185401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:39,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:39,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-06-05 22:19:39,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117670642] [2021-06-05 22:19:39,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:19:39,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:19:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:19:39,234 INFO L87 Difference]: Start difference. First operand 835 states and 2667 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:39,856 INFO L93 Difference]: Finished difference Result 1236 states and 3819 transitions. [2021-06-05 22:19:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:19:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:39,858 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 22:19:39,858 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 22:19:39,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 663.8ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:19:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 22:19:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 835. [2021-06-05 22:19:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.197841726618705) internal successors, (2667), 834 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2667 transitions. [2021-06-05 22:19:39,866 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2667 transitions. Word has length 24 [2021-06-05 22:19:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:39,866 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2667 transitions. [2021-06-05 22:19:39,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2667 transitions. [2021-06-05 22:19:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:39,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:39,867 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:40,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15293 [2021-06-05 22:19:40,068 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:40,068 INFO L82 PathProgramCache]: Analyzing trace with hash 992130838, now seen corresponding path program 161 times [2021-06-05 22:19:40,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:40,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300414171] [2021-06-05 22:19:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:40,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:40,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300414171] [2021-06-05 22:19:40,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300414171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:40,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386713674] [2021-06-05 22:19:40,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:40,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:19:40,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:40,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386713674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:40,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:40,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:40,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379383268] [2021-06-05 22:19:40,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:40,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:40,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:40,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:40,549 INFO L87 Difference]: Start difference. First operand 835 states and 2667 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:42,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:42,832 INFO L93 Difference]: Finished difference Result 1326 states and 4053 transitions. [2021-06-05 22:19:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:19:42,832 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:42,834 INFO L225 Difference]: With dead ends: 1326 [2021-06-05 22:19:42,834 INFO L226 Difference]: Without dead ends: 1229 [2021-06-05 22:19:42,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1941.8ms TimeCoverageRelationStatistics Valid=459, Invalid=3963, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:19:42,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-06-05 22:19:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 820. [2021-06-05 22:19:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.199023199023199) internal successors, (2620), 819 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2620 transitions. [2021-06-05 22:19:42,844 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2620 transitions. Word has length 24 [2021-06-05 22:19:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:42,844 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2620 transitions. [2021-06-05 22:19:42,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2620 transitions. [2021-06-05 22:19:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:42,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:42,845 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:43,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15374,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:43,045 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1621112362, now seen corresponding path program 162 times [2021-06-05 22:19:43,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:43,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314021161] [2021-06-05 22:19:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:43,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:43,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314021161] [2021-06-05 22:19:43,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314021161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:43,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338684640] [2021-06-05 22:19:43,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:43,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:19:43,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:43,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:43,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:43,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:43,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:43,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:19:43,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:43,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,292 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,295 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,298 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,301 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,304 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,306 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:43,310 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,313 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,315 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:43,319 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,321 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,324 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,399 INFO L628 ElimStorePlain]: treesize reduction 33, result has 77.4 percent of original size [2021-06-05 22:19:43,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:19:43,403 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 2 variables, input treesize:675, output treesize:103 [2021-06-05 22:19:43,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:43,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:43,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:19:43,490 INFO L518 ElimStorePlain]: Eliminatee index_of_8 vanished before elimination [2021-06-05 22:19:43,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:19:43,491 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:101, output treesize:39 [2021-06-05 22:19:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:43,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338684640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:43,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:43,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:19:43,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832521263] [2021-06-05 22:19:43,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:19:43,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:43,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:19:43,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:19:43,588 INFO L87 Difference]: Start difference. First operand 820 states and 2620 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:43,857 INFO L93 Difference]: Finished difference Result 918 states and 2879 transitions. [2021-06-05 22:19:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:19:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:43,858 INFO L225 Difference]: With dead ends: 918 [2021-06-05 22:19:43,858 INFO L226 Difference]: Without dead ends: 831 [2021-06-05 22:19:43,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-06-05 22:19:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2021-06-05 22:19:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.197590361445783) internal successors, (2654), 830 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2654 transitions. [2021-06-05 22:19:43,867 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2654 transitions. Word has length 24 [2021-06-05 22:19:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:43,867 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2654 transitions. [2021-06-05 22:19:43,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2654 transitions. [2021-06-05 22:19:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:43,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:43,868 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:44,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15379 [2021-06-05 22:19:44,068 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1940032688, now seen corresponding path program 163 times [2021-06-05 22:19:44,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:44,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771144405] [2021-06-05 22:19:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:44,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:44,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771144405] [2021-06-05 22:19:44,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771144405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:44,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938637139] [2021-06-05 22:19:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:44,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:44,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:44,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:44,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:44,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:44,341 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:44,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:44,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:19:44,352 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,356 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,359 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:44,363 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,366 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,369 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,371 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,374 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,378 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,381 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,384 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,387 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,389 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,467 INFO L628 ElimStorePlain]: treesize reduction 91, result has 55.4 percent of original size [2021-06-05 22:19:44,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:19:44,470 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 2 variables, input treesize:780, output treesize:103 [2021-06-05 22:19:44,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:44,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:44,615 INFO L628 ElimStorePlain]: treesize reduction 27, result has 56.5 percent of original size [2021-06-05 22:19:44,615 INFO L518 ElimStorePlain]: Eliminatee index_of_8 vanished before elimination [2021-06-05 22:19:44,615 INFO L518 ElimStorePlain]: Eliminatee v_prenex_335 vanished before elimination [2021-06-05 22:19:44,615 INFO L518 ElimStorePlain]: Eliminatee v_prenex_336 vanished before elimination [2021-06-05 22:19:44,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:19:44,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:89, output treesize:35 [2021-06-05 22:19:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:44,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938637139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:44,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:44,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:19:44,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585167474] [2021-06-05 22:19:44,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:19:44,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:44,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:19:44,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:19:44,702 INFO L87 Difference]: Start difference. First operand 831 states and 2654 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:45,068 INFO L93 Difference]: Finished difference Result 989 states and 3101 transitions. [2021-06-05 22:19:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:19:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:45,069 INFO L225 Difference]: With dead ends: 989 [2021-06-05 22:19:45,069 INFO L226 Difference]: Without dead ends: 914 [2021-06-05 22:19:45,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-06-05 22:19:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 844. [2021-06-05 22:19:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1981020166073546) internal successors, (2696), 843 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2696 transitions. [2021-06-05 22:19:45,077 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2696 transitions. Word has length 24 [2021-06-05 22:19:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:45,077 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2696 transitions. [2021-06-05 22:19:45,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:45,077 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2696 transitions. [2021-06-05 22:19:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:45,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:45,078 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:45,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15405 [2021-06-05 22:19:45,279 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:45,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:45,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1223624342, now seen corresponding path program 164 times [2021-06-05 22:19:45,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:45,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209780955] [2021-06-05 22:19:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:45,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:45,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209780955] [2021-06-05 22:19:45,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209780955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:45,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209811281] [2021-06-05 22:19:45,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:45,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:45,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:45,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209811281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:45,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:45,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-06-05 22:19:45,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962314417] [2021-06-05 22:19:45,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:19:45,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:19:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:19:45,757 INFO L87 Difference]: Start difference. First operand 844 states and 2696 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:49,052 INFO L93 Difference]: Finished difference Result 1596 states and 4826 transitions. [2021-06-05 22:19:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:19:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:49,054 INFO L225 Difference]: With dead ends: 1596 [2021-06-05 22:19:49,055 INFO L226 Difference]: Without dead ends: 1458 [2021-06-05 22:19:49,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 2692.1ms TimeCoverageRelationStatistics Valid=602, Invalid=5560, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:19:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-06-05 22:19:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 850. [2021-06-05 22:19:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.193168433451119) internal successors, (2711), 849 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2711 transitions. [2021-06-05 22:19:49,065 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2711 transitions. Word has length 24 [2021-06-05 22:19:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:49,065 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2711 transitions. [2021-06-05 22:19:49,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:49,065 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2711 transitions. [2021-06-05 22:19:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:49,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:49,066 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:49,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15439,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:49,267 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash -267267018, now seen corresponding path program 165 times [2021-06-05 22:19:49,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:49,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955853554] [2021-06-05 22:19:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:49,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:49,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955853554] [2021-06-05 22:19:49,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955853554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:49,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105795610] [2021-06-05 22:19:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:49,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:19:49,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:49,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:49,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105795610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:49,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:49,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:49,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533239581] [2021-06-05 22:19:49,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:49,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:49,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:49,667 INFO L87 Difference]: Start difference. First operand 850 states and 2711 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:51,947 INFO L93 Difference]: Finished difference Result 1428 states and 4380 transitions. [2021-06-05 22:19:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:19:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:51,949 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 22:19:51,949 INFO L226 Difference]: Without dead ends: 1331 [2021-06-05 22:19:51,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1759.3ms TimeCoverageRelationStatistics Valid=469, Invalid=4643, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:19:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-05 22:19:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 875. [2021-06-05 22:19:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.203661327231121) internal successors, (2800), 874 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2800 transitions. [2021-06-05 22:19:51,959 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2800 transitions. Word has length 24 [2021-06-05 22:19:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:51,960 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2800 transitions. [2021-06-05 22:19:51,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2800 transitions. [2021-06-05 22:19:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:51,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:51,961 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:52,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15447 [2021-06-05 22:19:52,161 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:52,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1171340002, now seen corresponding path program 166 times [2021-06-05 22:19:52,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:52,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221660114] [2021-06-05 22:19:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:52,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:52,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221660114] [2021-06-05 22:19:52,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221660114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:52,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695065322] [2021-06-05 22:19:52,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:52,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:52,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:52,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:52,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:52,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:52,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:52,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:19:52,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:52,381 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 22:19:52,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_337 vanished before elimination [2021-06-05 22:19:52,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:19:52,383 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:101, output treesize:45 [2021-06-05 22:19:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:52,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695065322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:52,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:52,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:19:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158947898] [2021-06-05 22:19:52,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:19:52,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:52,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:19:52,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:19:52,453 INFO L87 Difference]: Start difference. First operand 875 states and 2800 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:52,660 INFO L93 Difference]: Finished difference Result 1147 states and 3604 transitions. [2021-06-05 22:19:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:19:52,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:52,662 INFO L225 Difference]: With dead ends: 1147 [2021-06-05 22:19:52,662 INFO L226 Difference]: Without dead ends: 1096 [2021-06-05 22:19:52,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-06-05 22:19:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 887. [2021-06-05 22:19:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.2133182844243793) internal successors, (2847), 886 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2847 transitions. [2021-06-05 22:19:52,671 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2847 transitions. Word has length 24 [2021-06-05 22:19:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:52,671 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2847 transitions. [2021-06-05 22:19:52,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2847 transitions. [2021-06-05 22:19:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:52,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:52,672 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:52,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15455,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:52,887 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:52,888 INFO L82 PathProgramCache]: Analyzing trace with hash -194617764, now seen corresponding path program 167 times [2021-06-05 22:19:52,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:52,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100281162] [2021-06-05 22:19:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:53,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:53,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100281162] [2021-06-05 22:19:53,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100281162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:53,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873962068] [2021-06-05 22:19:53,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:53,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:19:53,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:53,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:53,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873962068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:53,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:53,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-06-05 22:19:53,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037183265] [2021-06-05 22:19:53,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:19:53,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:53,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:19:53,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:19:53,334 INFO L87 Difference]: Start difference. First operand 887 states and 2847 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:57,030 INFO L93 Difference]: Finished difference Result 1772 states and 5365 transitions. [2021-06-05 22:19:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 22:19:57,030 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:57,033 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 22:19:57,033 INFO L226 Difference]: Without dead ends: 1634 [2021-06-05 22:19:57,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 2816.8ms TimeCoverageRelationStatistics Valid=683, Invalid=7327, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 22:19:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-06-05 22:19:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 885. [2021-06-05 22:19:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.1957013574660635) internal successors, (2825), 884 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2825 transitions. [2021-06-05 22:19:57,044 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2825 transitions. Word has length 24 [2021-06-05 22:19:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:57,044 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 2825 transitions. [2021-06-05 22:19:57,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2825 transitions. [2021-06-05 22:19:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:57,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:57,046 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:57,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15467 [2021-06-05 22:19:57,246 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash 658822974, now seen corresponding path program 168 times [2021-06-05 22:19:57,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:57,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017526228] [2021-06-05 22:19:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:57,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:57,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017526228] [2021-06-05 22:19:57,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017526228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:57,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285623551] [2021-06-05 22:19:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:57,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:19:57,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:19:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:19:57,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285623551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:57,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:57,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:19:57,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188801538] [2021-06-05 22:19:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:19:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:19:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:57,662 INFO L87 Difference]: Start difference. First operand 885 states and 2825 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:59,655 INFO L93 Difference]: Finished difference Result 1426 states and 4389 transitions. [2021-06-05 22:19:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:19:59,655 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:19:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:59,657 INFO L225 Difference]: With dead ends: 1426 [2021-06-05 22:19:59,657 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 22:19:59,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1566.6ms TimeCoverageRelationStatistics Valid=440, Invalid=4390, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:19:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 22:19:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 910. [2021-06-05 22:19:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.2057205720572055) internal successors, (2914), 909 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2914 transitions. [2021-06-05 22:19:59,667 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2914 transitions. Word has length 24 [2021-06-05 22:19:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:59,667 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 2914 transitions. [2021-06-05 22:19:59,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2914 transitions. [2021-06-05 22:19:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:19:59,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:59,669 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:59,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15480,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:59,869 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1635545212, now seen corresponding path program 169 times [2021-06-05 22:19:59,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:59,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39043985] [2021-06-05 22:19:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:00,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:00,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39043985] [2021-06-05 22:20:00,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39043985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:00,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435321507] [2021-06-05 22:20:00,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:00,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:00,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:00,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435321507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:00,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:00,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:20:00,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150956715] [2021-06-05 22:20:00,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:20:00,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:20:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:00,291 INFO L87 Difference]: Start difference. First operand 910 states and 2914 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:02,949 INFO L93 Difference]: Finished difference Result 1677 states and 5079 transitions. [2021-06-05 22:20:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:20:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:02,951 INFO L225 Difference]: With dead ends: 1677 [2021-06-05 22:20:02,951 INFO L226 Difference]: Without dead ends: 1539 [2021-06-05 22:20:02,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 2056.8ms TimeCoverageRelationStatistics Valid=525, Invalid=5025, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:20:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-06-05 22:20:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 908. [2021-06-05 22:20:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.205071664829107) internal successors, (2907), 907 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2907 transitions. [2021-06-05 22:20:02,964 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2907 transitions. Word has length 24 [2021-06-05 22:20:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:02,964 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 2907 transitions. [2021-06-05 22:20:02,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2907 transitions. [2021-06-05 22:20:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:02,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:02,965 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:03,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15486 [2021-06-05 22:20:03,165 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:03,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1191239562, now seen corresponding path program 170 times [2021-06-05 22:20:03,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:03,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104835804] [2021-06-05 22:20:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:03,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:03,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104835804] [2021-06-05 22:20:03,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104835804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:03,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493051896] [2021-06-05 22:20:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:03,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:03,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:03,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:03,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:03,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493051896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:03,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:03,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:20:03,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169988949] [2021-06-05 22:20:03,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:20:03,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:03,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:20:03,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:20:03,531 INFO L87 Difference]: Start difference. First operand 908 states and 2907 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:03,754 INFO L93 Difference]: Finished difference Result 996 states and 3146 transitions. [2021-06-05 22:20:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:20:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:03,755 INFO L225 Difference]: With dead ends: 996 [2021-06-05 22:20:03,755 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 22:20:03,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 22:20:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2021-06-05 22:20:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.2054347826086955) internal successors, (2949), 920 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2949 transitions. [2021-06-05 22:20:03,764 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2949 transitions. Word has length 24 [2021-06-05 22:20:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:03,764 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 2949 transitions. [2021-06-05 22:20:03,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2949 transitions. [2021-06-05 22:20:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:03,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:03,765 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:03,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15499,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:03,966 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1907647908, now seen corresponding path program 171 times [2021-06-05 22:20:03,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:03,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874102200] [2021-06-05 22:20:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:04,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:04,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874102200] [2021-06-05 22:20:04,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874102200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:04,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253663044] [2021-06-05 22:20:04,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:04,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:20:04,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:04,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:04,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253663044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:04,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:04,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-06-05 22:20:04,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568595036] [2021-06-05 22:20:04,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:20:04,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:20:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:20:04,493 INFO L87 Difference]: Start difference. First operand 921 states and 2949 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:05,035 INFO L93 Difference]: Finished difference Result 1309 states and 4059 transitions. [2021-06-05 22:20:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:20:05,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:05,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:05,037 INFO L225 Difference]: With dead ends: 1309 [2021-06-05 22:20:05,037 INFO L226 Difference]: Without dead ends: 1195 [2021-06-05 22:20:05,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-05 22:20:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 908. [2021-06-05 22:20:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.205071664829107) internal successors, (2907), 907 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2907 transitions. [2021-06-05 22:20:05,047 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2907 transitions. Word has length 24 [2021-06-05 22:20:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:05,047 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 2907 transitions. [2021-06-05 22:20:05,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2907 transitions. [2021-06-05 22:20:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:05,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:05,048 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:05,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15527,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:05,248 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:05,248 INFO L82 PathProgramCache]: Analyzing trace with hash -308978436, now seen corresponding path program 172 times [2021-06-05 22:20:05,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:05,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933434630] [2021-06-05 22:20:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:05,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:05,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933434630] [2021-06-05 22:20:05,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933434630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:05,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919321346] [2021-06-05 22:20:05,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:05,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:05,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:05,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919321346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:05,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:05,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:20:05,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268729962] [2021-06-05 22:20:05,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:20:05,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:05,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:20:05,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:20:05,769 INFO L87 Difference]: Start difference. First operand 908 states and 2907 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:05,996 INFO L93 Difference]: Finished difference Result 1069 states and 3373 transitions. [2021-06-05 22:20:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:20:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:05,998 INFO L225 Difference]: With dead ends: 1069 [2021-06-05 22:20:05,998 INFO L226 Difference]: Without dead ends: 1018 [2021-06-05 22:20:05,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:20:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-06-05 22:20:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 900. [2021-06-05 22:20:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.208008898776418) internal successors, (2884), 899 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2884 transitions. [2021-06-05 22:20:06,007 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2884 transitions. Word has length 24 [2021-06-05 22:20:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:06,007 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2884 transitions. [2021-06-05 22:20:06,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2884 transitions. [2021-06-05 22:20:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:06,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:06,008 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:06,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15602 [2021-06-05 22:20:06,209 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:06,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:06,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1804211280, now seen corresponding path program 173 times [2021-06-05 22:20:06,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:06,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614625290] [2021-06-05 22:20:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:06,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:06,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614625290] [2021-06-05 22:20:06,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614625290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:06,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323715256] [2021-06-05 22:20:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:06,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:20:06,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:06,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:06,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:06,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:06,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:06,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:06,391 INFO L628 ElimStorePlain]: treesize reduction 34, result has 43.3 percent of original size [2021-06-05 22:20:06,392 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:20:06,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:20:06,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:26 [2021-06-05 22:20:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:06,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323715256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:06,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:06,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:20:06,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510353138] [2021-06-05 22:20:06,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:20:06,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:06,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:20:06,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:20:06,464 INFO L87 Difference]: Start difference. First operand 900 states and 2884 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:06,688 INFO L93 Difference]: Finished difference Result 1123 states and 3542 transitions. [2021-06-05 22:20:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:20:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:06,690 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 22:20:06,690 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 22:20:06,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 22:20:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 918. [2021-06-05 22:20:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.2224645583424207) internal successors, (2955), 917 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2955 transitions. [2021-06-05 22:20:06,707 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2955 transitions. Word has length 24 [2021-06-05 22:20:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:06,708 INFO L482 AbstractCegarLoop]: Abstraction has 918 states and 2955 transitions. [2021-06-05 22:20:06,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2955 transitions. [2021-06-05 22:20:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:06,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:06,709 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:06,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15688 [2021-06-05 22:20:06,909 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1586683032, now seen corresponding path program 174 times [2021-06-05 22:20:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:06,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581862836] [2021-06-05 22:20:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:07,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:07,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581862836] [2021-06-05 22:20:07,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581862836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:07,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960285924] [2021-06-05 22:20:07,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:07,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:20:07,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:07,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:07,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:07,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:07,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:07,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:07,119 INFO L628 ElimStorePlain]: treesize reduction 34, result has 43.3 percent of original size [2021-06-05 22:20:07,120 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:20:07,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:20:07,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:26 [2021-06-05 22:20:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:07,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960285924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:07,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:07,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:20:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074223383] [2021-06-05 22:20:07,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:20:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:20:07,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:20:07,189 INFO L87 Difference]: Start difference. First operand 918 states and 2955 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:07,422 INFO L93 Difference]: Finished difference Result 1234 states and 3883 transitions. [2021-06-05 22:20:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:20:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:07,424 INFO L225 Difference]: With dead ends: 1234 [2021-06-05 22:20:07,424 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 22:20:07,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 22:20:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 936. [2021-06-05 22:20:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.2363636363636363) internal successors, (3026), 935 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3026 transitions. [2021-06-05 22:20:07,435 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3026 transitions. Word has length 24 [2021-06-05 22:20:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:07,435 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 3026 transitions. [2021-06-05 22:20:07,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3026 transitions. [2021-06-05 22:20:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:07,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:07,436 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:07,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15697,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:07,641 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1731562026, now seen corresponding path program 175 times [2021-06-05 22:20:07,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:07,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967690506] [2021-06-05 22:20:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:07,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967690506] [2021-06-05 22:20:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967690506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368420072] [2021-06-05 22:20:07,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:07,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:07,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:07,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:07,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:07,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:07,853 INFO L628 ElimStorePlain]: treesize reduction 34, result has 43.3 percent of original size [2021-06-05 22:20:07,853 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:20:07,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:20:07,855 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:26 [2021-06-05 22:20:08,276 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 49 [2021-06-05 22:20:08,552 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 52 [2021-06-05 22:20:08,900 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 69 [2021-06-05 22:20:09,877 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-06-05 22:20:10,304 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 57 [2021-06-05 22:20:10,612 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 22:20:11,002 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 48 [2021-06-05 22:20:11,287 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 81 [2021-06-05 22:20:11,961 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 54 [2021-06-05 22:20:12,563 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 50 [2021-06-05 22:20:12,881 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 49 [2021-06-05 22:20:13,271 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 50 [2021-06-05 22:20:13,494 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 22:20:13,761 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 22:20:13,885 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 22:20:16,208 WARN L205 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-05 22:20:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:16,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368420072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:16,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:16,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 22:20:16,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250025506] [2021-06-05 22:20:16,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:16,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:16,435 INFO L87 Difference]: Start difference. First operand 936 states and 3026 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:17,413 INFO L93 Difference]: Finished difference Result 1578 states and 4823 transitions. [2021-06-05 22:20:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:20:17,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:17,416 INFO L225 Difference]: With dead ends: 1578 [2021-06-05 22:20:17,416 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 22:20:17,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:20:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 22:20:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 912. [2021-06-05 22:20:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.2184412733260155) internal successors, (2932), 911 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2932 transitions. [2021-06-05 22:20:17,426 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2932 transitions. Word has length 24 [2021-06-05 22:20:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:17,426 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 2932 transitions. [2021-06-05 22:20:17,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2932 transitions. [2021-06-05 22:20:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:17,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:17,427 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:17,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15707,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:17,628 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash -132892554, now seen corresponding path program 176 times [2021-06-05 22:20:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:17,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824164860] [2021-06-05 22:20:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:17,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:17,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824164860] [2021-06-05 22:20:17,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824164860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:17,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929406634] [2021-06-05 22:20:17,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:17,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:17,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:17,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:17,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:17,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:17,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:17,837 INFO L628 ElimStorePlain]: treesize reduction 34, result has 43.3 percent of original size [2021-06-05 22:20:17,837 INFO L518 ElimStorePlain]: Eliminatee v_prenex_345 vanished before elimination [2021-06-05 22:20:17,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:20:17,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:26 [2021-06-05 22:20:18,244 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 70 [2021-06-05 22:20:19,016 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 22:20:20,316 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 76 [2021-06-05 22:20:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:20,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929406634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:20,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:20,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 22:20:20,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697163336] [2021-06-05 22:20:20,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:20,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:20,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:20,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:20,479 INFO L87 Difference]: Start difference. First operand 912 states and 2932 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:21,689 INFO L93 Difference]: Finished difference Result 1759 states and 5331 transitions. [2021-06-05 22:20:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:20:21,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:21,692 INFO L225 Difference]: With dead ends: 1759 [2021-06-05 22:20:21,692 INFO L226 Difference]: Without dead ends: 1618 [2021-06-05 22:20:21,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1184.2ms TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:20:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-06-05 22:20:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 918. [2021-06-05 22:20:21,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.2300981461286806) internal successors, (2962), 917 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2962 transitions. [2021-06-05 22:20:21,703 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2962 transitions. Word has length 24 [2021-06-05 22:20:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:21,703 INFO L482 AbstractCegarLoop]: Abstraction has 918 states and 2962 transitions. [2021-06-05 22:20:21,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2962 transitions. [2021-06-05 22:20:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:21,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:21,704 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:21,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15969 [2021-06-05 22:20:21,905 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1361425282, now seen corresponding path program 177 times [2021-06-05 22:20:21,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:21,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399208158] [2021-06-05 22:20:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:22,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399208158] [2021-06-05 22:20:22,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399208158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432650244] [2021-06-05 22:20:22,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:22,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:20:22,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:22,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:22,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432650244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:22,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:22,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:20:22,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587720766] [2021-06-05 22:20:22,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:20:22,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:22,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:20:22,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:22,240 INFO L87 Difference]: Start difference. First operand 918 states and 2962 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:25,944 INFO L93 Difference]: Finished difference Result 1925 states and 5843 transitions. [2021-06-05 22:20:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 22:20:25,945 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:25,947 INFO L225 Difference]: With dead ends: 1925 [2021-06-05 22:20:25,947 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 22:20:25,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 3102.8ms TimeCoverageRelationStatistics Valid=1267, Invalid=9653, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 22:20:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 22:20:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 868. [2021-06-05 22:20:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.2214532871972317) internal successors, (2793), 867 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2793 transitions. [2021-06-05 22:20:25,960 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2793 transitions. Word has length 24 [2021-06-05 22:20:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:25,960 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2793 transitions. [2021-06-05 22:20:25,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2793 transitions. [2021-06-05 22:20:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:25,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:25,961 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:26,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16235,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:26,173 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2091239856, now seen corresponding path program 178 times [2021-06-05 22:20:26,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:26,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587093711] [2021-06-05 22:20:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:26,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:26,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587093711] [2021-06-05 22:20:26,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587093711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:26,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680542038] [2021-06-05 22:20:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:26,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:26,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:26,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:26,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:26,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:26,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,351 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:20:26,352 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-06-05 22:20:26,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:20:26,353 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:20:26,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:26,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:26,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:26,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:26,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:26,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:26,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:26,498 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:26,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:26,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:26,536 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:26,541 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:26,544 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:26,569 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.8 percent of original size [2021-06-05 22:20:26,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:20:26,569 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:221, output treesize:14 [2021-06-05 22:20:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:26,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680542038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:26,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:26,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:20:26,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267173029] [2021-06-05 22:20:26,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:20:26,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:26,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:20:26,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:20:26,600 INFO L87 Difference]: Start difference. First operand 868 states and 2793 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:26,785 INFO L93 Difference]: Finished difference Result 1029 states and 3256 transitions. [2021-06-05 22:20:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:20:26,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:26,787 INFO L225 Difference]: With dead ends: 1029 [2021-06-05 22:20:26,787 INFO L226 Difference]: Without dead ends: 978 [2021-06-05 22:20:26,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-06-05 22:20:26,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 872. [2021-06-05 22:20:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.2181400688863375) internal successors, (2803), 871 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2803 transitions. [2021-06-05 22:20:26,796 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2803 transitions. Word has length 24 [2021-06-05 22:20:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:26,796 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2803 transitions. [2021-06-05 22:20:26,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2803 transitions. [2021-06-05 22:20:26,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:26,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:26,797 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:27,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16243 [2021-06-05 22:20:27,013 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:27,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1299654456, now seen corresponding path program 179 times [2021-06-05 22:20:27,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:27,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932123791] [2021-06-05 22:20:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:27,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932123791] [2021-06-05 22:20:27,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932123791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625059294] [2021-06-05 22:20:27,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:27,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:20:27,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:27,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:27,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625059294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:27,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:27,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:20:27,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061601065] [2021-06-05 22:20:27,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:20:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:20:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:27,405 INFO L87 Difference]: Start difference. First operand 872 states and 2803 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:29,368 INFO L93 Difference]: Finished difference Result 1506 states and 4633 transitions. [2021-06-05 22:20:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:20:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:29,370 INFO L225 Difference]: With dead ends: 1506 [2021-06-05 22:20:29,370 INFO L226 Difference]: Without dead ends: 1409 [2021-06-05 22:20:29,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1524.4ms TimeCoverageRelationStatistics Valid=425, Invalid=3481, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:20:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-06-05 22:20:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 884. [2021-06-05 22:20:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.227633069082673) internal successors, (2850), 883 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2850 transitions. [2021-06-05 22:20:29,381 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2850 transitions. Word has length 24 [2021-06-05 22:20:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:29,381 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2850 transitions. [2021-06-05 22:20:29,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2850 transitions. [2021-06-05 22:20:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:29,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:29,382 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:29,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16278 [2021-06-05 22:20:29,583 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:29,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2018590602, now seen corresponding path program 180 times [2021-06-05 22:20:29,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:29,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500001483] [2021-06-05 22:20:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:29,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:29,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500001483] [2021-06-05 22:20:29,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500001483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:29,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931283835] [2021-06-05 22:20:29,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:29,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:20:29,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:29,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:29,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931283835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:29,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:29,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:20:29,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267812355] [2021-06-05 22:20:29,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:20:29,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:29,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:20:29,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:20:29,805 INFO L87 Difference]: Start difference. First operand 884 states and 2850 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:29,993 INFO L93 Difference]: Finished difference Result 1157 states and 3630 transitions. [2021-06-05 22:20:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:20:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:29,995 INFO L225 Difference]: With dead ends: 1157 [2021-06-05 22:20:29,995 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 22:20:29,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:29,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 22:20:30,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 860. [2021-06-05 22:20:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.208381839348079) internal successors, (2756), 859 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2756 transitions. [2021-06-05 22:20:30,004 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2756 transitions. Word has length 24 [2021-06-05 22:20:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:30,004 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2756 transitions. [2021-06-05 22:20:30,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2756 transitions. [2021-06-05 22:20:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:30,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:30,005 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:30,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16287 [2021-06-05 22:20:30,206 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:30,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:30,206 INFO L82 PathProgramCache]: Analyzing trace with hash -419921130, now seen corresponding path program 181 times [2021-06-05 22:20:30,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:30,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894820192] [2021-06-05 22:20:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:30,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894820192] [2021-06-05 22:20:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894820192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372962938] [2021-06-05 22:20:30,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:30,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:30,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:30,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372962938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:30,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:30,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:20:30,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453206515] [2021-06-05 22:20:30,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:20:30,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:30,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:20:30,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:20:30,428 INFO L87 Difference]: Start difference. First operand 860 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:30,605 INFO L93 Difference]: Finished difference Result 1117 states and 3524 transitions. [2021-06-05 22:20:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:20:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:30,607 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 22:20:30,607 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 22:20:30,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:20:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 22:20:30,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 860. [2021-06-05 22:20:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.208381839348079) internal successors, (2756), 859 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2756 transitions. [2021-06-05 22:20:30,616 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2756 transitions. Word has length 24 [2021-06-05 22:20:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:30,616 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2756 transitions. [2021-06-05 22:20:30,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2756 transitions. [2021-06-05 22:20:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:30,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:30,617 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:30,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16296 [2021-06-05 22:20:30,817 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:30,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1165149864, now seen corresponding path program 182 times [2021-06-05 22:20:30,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:30,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127381315] [2021-06-05 22:20:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:30,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:30,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127381315] [2021-06-05 22:20:30,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127381315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:30,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240516820] [2021-06-05 22:20:30,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:30,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:30,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:30,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:30,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:30,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:30,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:30,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:31,019 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:20:31,019 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:20:31,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:20:31,021 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:20:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:31,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240516820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:31,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:31,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:20:31,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143807367] [2021-06-05 22:20:31,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:20:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:20:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:20:31,110 INFO L87 Difference]: Start difference. First operand 860 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:31,254 INFO L93 Difference]: Finished difference Result 1017 states and 3224 transitions. [2021-06-05 22:20:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:20:31,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:31,256 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 22:20:31,256 INFO L226 Difference]: Without dead ends: 966 [2021-06-05 22:20:31,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-05 22:20:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 885. [2021-06-05 22:20:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.2183257918552037) internal successors, (2845), 884 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2845 transitions. [2021-06-05 22:20:31,265 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2845 transitions. Word has length 24 [2021-06-05 22:20:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:31,265 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 2845 transitions. [2021-06-05 22:20:31,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2845 transitions. [2021-06-05 22:20:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:31,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:31,266 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:31,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16304,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:31,477 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:31,478 INFO L82 PathProgramCache]: Analyzing trace with hash -188427626, now seen corresponding path program 183 times [2021-06-05 22:20:31,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:31,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465863976] [2021-06-05 22:20:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:31,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:31,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465863976] [2021-06-05 22:20:31,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465863976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:31,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189657213] [2021-06-05 22:20:31,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:31,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:20:31,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:31,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:31,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:31,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:31,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:31,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:31,673 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:20:31,673 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:20:31,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:20:31,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:20:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:32,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189657213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:32,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:32,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:20:32,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157559392] [2021-06-05 22:20:32,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:20:32,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:20:32,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:20:32,275 INFO L87 Difference]: Start difference. First operand 885 states and 2845 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:32,552 INFO L93 Difference]: Finished difference Result 1167 states and 3660 transitions. [2021-06-05 22:20:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:20:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:32,554 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 22:20:32,554 INFO L226 Difference]: Without dead ends: 1104 [2021-06-05 22:20:32,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-05 22:20:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 873. [2021-06-05 22:20:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.208715596330275) internal successors, (2798), 872 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2798 transitions. [2021-06-05 22:20:32,563 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2798 transitions. Word has length 24 [2021-06-05 22:20:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:32,563 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2798 transitions. [2021-06-05 22:20:32,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2798 transitions. [2021-06-05 22:20:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:32,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:32,564 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:32,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16317,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:32,773 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1410241846, now seen corresponding path program 184 times [2021-06-05 22:20:32,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:32,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871399527] [2021-06-05 22:20:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:32,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:32,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871399527] [2021-06-05 22:20:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871399527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:32,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437677014] [2021-06-05 22:20:32,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:32,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:32,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:32,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:32,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:32,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:32,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:32,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,004 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 22:20:33,004 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:20:33,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:20:33,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:101, output treesize:45 [2021-06-05 22:20:35,251 INFO L446 ElimStorePlain]: Different costs {0=[char_at_9], 3=[char_at_1]} [2021-06-05 22:20:35,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:35,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,287 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,292 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:35,299 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:20:35,307 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:35,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,320 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,327 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,334 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,339 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,346 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,352 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,358 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,365 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,372 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,378 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,385 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:20:35,401 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:35,409 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,416 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,422 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,429 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,435 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,441 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,461 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:35,469 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,477 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:20:35,484 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,492 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,499 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,505 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,511 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,517 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,523 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,529 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,535 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,541 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,547 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:20:35,554 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,559 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,566 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,574 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,580 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,586 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:35,593 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,609 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:35,618 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,624 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,630 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,637 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,645 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,651 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,657 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,663 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,669 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,676 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,682 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,689 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,694 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,700 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,706 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,712 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:35,719 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,725 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,731 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,737 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,744 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,751 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,757 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,763 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,768 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,774 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,781 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,788 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,794 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:35,801 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:35,808 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,813 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,818 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,823 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,828 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,833 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:20:35,839 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,844 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,850 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,855 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,861 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,865 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,870 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,874 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,879 INFO L550 ElimStorePlain]: Start of recursive call 95: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,884 INFO L550 ElimStorePlain]: Start of recursive call 96: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,889 INFO L550 ElimStorePlain]: Start of recursive call 97: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,894 INFO L550 ElimStorePlain]: Start of recursive call 98: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:35,900 INFO L550 ElimStorePlain]: Start of recursive call 99: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,905 INFO L550 ElimStorePlain]: Start of recursive call 100: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,909 INFO L550 ElimStorePlain]: Start of recursive call 101: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,914 INFO L550 ElimStorePlain]: Start of recursive call 102: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,919 INFO L550 ElimStorePlain]: Start of recursive call 103: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,924 INFO L550 ElimStorePlain]: Start of recursive call 104: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,928 INFO L550 ElimStorePlain]: Start of recursive call 105: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,933 INFO L550 ElimStorePlain]: Start of recursive call 106: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,937 INFO L550 ElimStorePlain]: Start of recursive call 107: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,941 INFO L550 ElimStorePlain]: Start of recursive call 108: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,945 INFO L550 ElimStorePlain]: Start of recursive call 109: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,949 INFO L550 ElimStorePlain]: Start of recursive call 110: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:35,954 INFO L550 ElimStorePlain]: Start of recursive call 111: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,958 INFO L550 ElimStorePlain]: Start of recursive call 112: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,962 INFO L550 ElimStorePlain]: Start of recursive call 113: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,966 INFO L550 ElimStorePlain]: Start of recursive call 114: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,970 INFO L550 ElimStorePlain]: Start of recursive call 115: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,974 INFO L550 ElimStorePlain]: Start of recursive call 116: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:35,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:35,978 INFO L550 ElimStorePlain]: Start of recursive call 117: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:36,149 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-06-05 22:20:36,150 INFO L628 ElimStorePlain]: treesize reduction 144, result has 57.0 percent of original size [2021-06-05 22:20:36,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:36,153 INFO L550 ElimStorePlain]: Start of recursive call 118: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:36,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:36,156 INFO L550 ElimStorePlain]: Start of recursive call 119: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:36,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:36,160 INFO L550 ElimStorePlain]: Start of recursive call 120: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:36,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:36,163 INFO L550 ElimStorePlain]: Start of recursive call 121: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:36,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:36,166 INFO L550 ElimStorePlain]: Start of recursive call 122: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:36,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:36,169 INFO L550 ElimStorePlain]: Start of recursive call 123: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:36,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:36,172 INFO L550 ElimStorePlain]: Start of recursive call 124: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:36,266 INFO L628 ElimStorePlain]: treesize reduction 18, result has 86.6 percent of original size [2021-06-05 22:20:36,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:20:36,268 INFO L247 ElimStorePlain]: Needed 124 recursive calls to eliminate 5 variables, input treesize:4659, output treesize:31 [2021-06-05 22:20:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:36,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437677014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:36,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:36,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:20:36,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939745766] [2021-06-05 22:20:36,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:20:36,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:20:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:20:36,335 INFO L87 Difference]: Start difference. First operand 873 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:36,519 INFO L93 Difference]: Finished difference Result 1078 states and 3405 transitions. [2021-06-05 22:20:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:20:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:36,520 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 22:20:36,520 INFO L226 Difference]: Without dead ends: 1027 [2021-06-05 22:20:36,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:20:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-06-05 22:20:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 873. [2021-06-05 22:20:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.208715596330275) internal successors, (2798), 872 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2798 transitions. [2021-06-05 22:20:36,529 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2798 transitions. Word has length 24 [2021-06-05 22:20:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:36,529 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2798 transitions. [2021-06-05 22:20:36,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2798 transitions. [2021-06-05 22:20:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:36,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:36,530 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:36,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16505,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:36,730 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:36,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1279754896, now seen corresponding path program 185 times [2021-06-05 22:20:36,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:36,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526894185] [2021-06-05 22:20:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:36,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:36,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526894185] [2021-06-05 22:20:36,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526894185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:36,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245953790] [2021-06-05 22:20:36,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:36,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:20:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:37,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245953790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:37,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:37,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:20:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006165647] [2021-06-05 22:20:37,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:20:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:37,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:20:37,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:20:37,099 INFO L87 Difference]: Start difference. First operand 873 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:37,312 INFO L93 Difference]: Finished difference Result 961 states and 3037 transitions. [2021-06-05 22:20:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:20:37,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:37,313 INFO L225 Difference]: With dead ends: 961 [2021-06-05 22:20:37,313 INFO L226 Difference]: Without dead ends: 886 [2021-06-05 22:20:37,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-06-05 22:20:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2021-06-05 22:20:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.209039548022599) internal successors, (2840), 885 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2840 transitions. [2021-06-05 22:20:37,321 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2840 transitions. Word has length 24 [2021-06-05 22:20:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:37,322 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2840 transitions. [2021-06-05 22:20:37,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2840 transitions. [2021-06-05 22:20:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:37,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:37,323 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:37,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17322,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:37,523 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash 563346550, now seen corresponding path program 186 times [2021-06-05 22:20:37,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:37,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772992293] [2021-06-05 22:20:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:37,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:37,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772992293] [2021-06-05 22:20:37,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772992293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:37,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332405421] [2021-06-05 22:20:37,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:37,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:20:37,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:37,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:37,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:37,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332405421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:37,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:37,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:20:37,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430949033] [2021-06-05 22:20:37,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:20:37,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:20:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:37,965 INFO L87 Difference]: Start difference. First operand 886 states and 2840 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:40,500 INFO L93 Difference]: Finished difference Result 1516 states and 4595 transitions. [2021-06-05 22:20:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:20:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:40,502 INFO L225 Difference]: With dead ends: 1516 [2021-06-05 22:20:40,502 INFO L226 Difference]: Without dead ends: 1378 [2021-06-05 22:20:40,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 2065.4ms TimeCoverageRelationStatistics Valid=463, Invalid=4367, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:20:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-06-05 22:20:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 873. [2021-06-05 22:20:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.208715596330275) internal successors, (2798), 872 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2798 transitions. [2021-06-05 22:20:40,513 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2798 transitions. Word has length 24 [2021-06-05 22:20:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:40,513 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2798 transitions. [2021-06-05 22:20:40,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2798 transitions. [2021-06-05 22:20:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:40,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:40,515 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:40,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17357 [2021-06-05 22:20:40,715 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:40,715 INFO L82 PathProgramCache]: Analyzing trace with hash -264672456, now seen corresponding path program 187 times [2021-06-05 22:20:40,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:40,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803789085] [2021-06-05 22:20:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:41,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803789085] [2021-06-05 22:20:41,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803789085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858098582] [2021-06-05 22:20:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:41,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:41,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858098582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:41,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:41,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-06-05 22:20:41,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068093149] [2021-06-05 22:20:41,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:20:41,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:41,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:20:41,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:20:41,279 INFO L87 Difference]: Start difference. First operand 873 states and 2798 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:44,749 INFO L93 Difference]: Finished difference Result 1452 states and 4460 transitions. [2021-06-05 22:20:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:20:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:44,751 INFO L225 Difference]: With dead ends: 1452 [2021-06-05 22:20:44,751 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 22:20:44,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2732.2ms TimeCoverageRelationStatistics Valid=492, Invalid=5208, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 22:20:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 22:20:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 900. [2021-06-05 22:20:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.218020022246941) internal successors, (2893), 899 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2893 transitions. [2021-06-05 22:20:44,761 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2893 transitions. Word has length 24 [2021-06-05 22:20:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:44,761 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2893 transitions. [2021-06-05 22:20:44,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2893 transitions. [2021-06-05 22:20:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:44,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:44,762 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:44,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17363,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:44,963 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:44,963 INFO L82 PathProgramCache]: Analyzing trace with hash 712049782, now seen corresponding path program 188 times [2021-06-05 22:20:44,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:44,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630521785] [2021-06-05 22:20:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:45,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630521785] [2021-06-05 22:20:45,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630521785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484286475] [2021-06-05 22:20:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:45,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:45,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484286475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:45,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:45,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:20:45,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148388059] [2021-06-05 22:20:45,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:20:45,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:45,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:20:45,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:45,337 INFO L87 Difference]: Start difference. First operand 900 states and 2893 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:47,330 INFO L93 Difference]: Finished difference Result 1618 states and 4918 transitions. [2021-06-05 22:20:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:20:47,330 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:47,332 INFO L225 Difference]: With dead ends: 1618 [2021-06-05 22:20:47,332 INFO L226 Difference]: Without dead ends: 1499 [2021-06-05 22:20:47,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1457.0ms TimeCoverageRelationStatistics Valid=389, Invalid=3771, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:20:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-06-05 22:20:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 890. [2021-06-05 22:20:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.2069741282339708) internal successors, (2851), 889 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2851 transitions. [2021-06-05 22:20:47,344 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2851 transitions. Word has length 24 [2021-06-05 22:20:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:47,344 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 2851 transitions. [2021-06-05 22:20:47,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2851 transitions. [2021-06-05 22:20:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:47,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:47,345 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:47,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17369 [2021-06-05 22:20:47,545 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2114734992, now seen corresponding path program 189 times [2021-06-05 22:20:47,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:47,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498160525] [2021-06-05 22:20:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:47,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:47,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498160525] [2021-06-05 22:20:47,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498160525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:47,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701895193] [2021-06-05 22:20:47,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:47,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:20:47,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:47,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701895193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:48,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:48,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:20:48,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201807563] [2021-06-05 22:20:48,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:20:48,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:20:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:48,020 INFO L87 Difference]: Start difference. First operand 890 states and 2851 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:50,311 INFO L93 Difference]: Finished difference Result 1284 states and 3933 transitions. [2021-06-05 22:20:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:20:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:50,313 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 22:20:50,313 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 22:20:50,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1781.6ms TimeCoverageRelationStatistics Valid=346, Invalid=3560, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:20:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 22:20:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 903. [2021-06-05 22:20:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.2062084257206207) internal successors, (2892), 902 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2892 transitions. [2021-06-05 22:20:50,323 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2892 transitions. Word has length 24 [2021-06-05 22:20:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:50,323 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 2892 transitions. [2021-06-05 22:20:50,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2892 transitions. [2021-06-05 22:20:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:50,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:50,324 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:50,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17380 [2021-06-05 22:20:50,524 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1463823958, now seen corresponding path program 190 times [2021-06-05 22:20:50,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:50,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245016158] [2021-06-05 22:20:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:50,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:50,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245016158] [2021-06-05 22:20:50,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245016158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:50,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975629154] [2021-06-05 22:20:50,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:50,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:50,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:50,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975629154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:50,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:50,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:20:50,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205699456] [2021-06-05 22:20:50,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:20:50,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:50,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:20:50,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:50,966 INFO L87 Difference]: Start difference. First operand 903 states and 2892 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:53,736 INFO L93 Difference]: Finished difference Result 1777 states and 5379 transitions. [2021-06-05 22:20:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:20:53,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:53,738 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 22:20:53,738 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 22:20:53,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 2339.0ms TimeCoverageRelationStatistics Valid=620, Invalid=6186, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:20:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 22:20:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 888. [2021-06-05 22:20:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.2074408117249154) internal successors, (2845), 887 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2845 transitions. [2021-06-05 22:20:53,750 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2845 transitions. Word has length 24 [2021-06-05 22:20:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:53,750 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2845 transitions. [2021-06-05 22:20:53,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2845 transitions. [2021-06-05 22:20:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:53,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:53,751 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:53,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17388 [2021-06-05 22:20:53,951 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:53,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1232473866, now seen corresponding path program 191 times [2021-06-05 22:20:53,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:53,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612901517] [2021-06-05 22:20:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:54,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:54,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612901517] [2021-06-05 22:20:54,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612901517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:54,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766542756] [2021-06-05 22:20:54,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:54,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:20:54,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:54,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766542756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:54,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:54,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:20:54,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370320671] [2021-06-05 22:20:54,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:20:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:20:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:20:54,429 INFO L87 Difference]: Start difference. First operand 888 states and 2845 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:54,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:54,660 INFO L93 Difference]: Finished difference Result 1037 states and 3269 transitions. [2021-06-05 22:20:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:20:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:54,661 INFO L225 Difference]: With dead ends: 1037 [2021-06-05 22:20:54,661 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 22:20:54,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:20:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 22:20:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 851. [2021-06-05 22:20:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.204705882352941) internal successors, (2724), 850 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2724 transitions. [2021-06-05 22:20:54,669 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2724 transitions. Word has length 24 [2021-06-05 22:20:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:54,669 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2724 transitions. [2021-06-05 22:20:54,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2724 transitions. [2021-06-05 22:20:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:54,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:54,670 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:54,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17398 [2021-06-05 22:20:54,871 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash 449250230, now seen corresponding path program 192 times [2021-06-05 22:20:54,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:54,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542557294] [2021-06-05 22:20:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:54,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:54,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542557294] [2021-06-05 22:20:54,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542557294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:54,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893892295] [2021-06-05 22:20:54,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:54,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:20:54,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:54,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:55,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:55,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:55,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:55,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,118 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:55,122 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,126 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:55,129 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,132 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,135 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,142 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,145 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,149 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,152 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,155 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,158 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,161 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,163 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:55,166 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:55,169 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,257 INFO L628 ElimStorePlain]: treesize reduction 62, result has 63.7 percent of original size [2021-06-05 22:20:55,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:20:55,260 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:853, output treesize:101 [2021-06-05 22:20:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:55,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893892295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:55,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:55,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:20:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123597568] [2021-06-05 22:20:55,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:20:55,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:20:55,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:20:55,508 INFO L87 Difference]: Start difference. First operand 851 states and 2724 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:55,879 INFO L93 Difference]: Finished difference Result 998 states and 3132 transitions. [2021-06-05 22:20:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:20:55,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:55,880 INFO L225 Difference]: With dead ends: 998 [2021-06-05 22:20:55,880 INFO L226 Difference]: Without dead ends: 911 [2021-06-05 22:20:55,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:20:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-06-05 22:20:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 862. [2021-06-05 22:20:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.202090592334495) internal successors, (2757), 861 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2757 transitions. [2021-06-05 22:20:55,888 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2757 transitions. Word has length 24 [2021-06-05 22:20:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:55,888 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2757 transitions. [2021-06-05 22:20:55,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2757 transitions. [2021-06-05 22:20:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:55,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:55,889 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:56,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17484 [2021-06-05 22:20:56,090 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash -284572016, now seen corresponding path program 193 times [2021-06-05 22:20:56,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:56,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744568251] [2021-06-05 22:20:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:56,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:56,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744568251] [2021-06-05 22:20:56,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744568251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:56,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731196834] [2021-06-05 22:20:56,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:57,399 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 22:20:57,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:57,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:57,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:57,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,650 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:57,654 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:57,657 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,660 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,663 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,666 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,669 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,671 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:57,674 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:57,770 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.6 percent of original size [2021-06-05 22:20:57,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-06-05 22:20:57,773 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:547, output treesize:139 [2021-06-05 22:20:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:58,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731196834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:58,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:58,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:20:58,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10504612] [2021-06-05 22:20:58,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:20:58,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:58,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:20:58,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:20:58,052 INFO L87 Difference]: Start difference. First operand 862 states and 2757 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:58,477 INFO L93 Difference]: Finished difference Result 950 states and 2996 transitions. [2021-06-05 22:20:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:20:58,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:20:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:58,479 INFO L225 Difference]: With dead ends: 950 [2021-06-05 22:20:58,479 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 22:20:58,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:20:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 22:20:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-06-05 22:20:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.2025171624713957) internal successors, (2799), 874 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2799 transitions. [2021-06-05 22:20:58,487 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2799 transitions. Word has length 24 [2021-06-05 22:20:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:58,487 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2799 transitions. [2021-06-05 22:20:58,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2799 transitions. [2021-06-05 22:20:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:20:58,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:58,488 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:58,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17528,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:58,693 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1000980362, now seen corresponding path program 194 times [2021-06-05 22:20:58,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:58,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356962753] [2021-06-05 22:20:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:58,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:58,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356962753] [2021-06-05 22:20:58,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356962753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:58,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652987533] [2021-06-05 22:20:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:58,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:58,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:20:58,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:58,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:20:58,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:58,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:58,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:58,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:58,919 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,922 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,924 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,927 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,930 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:58,933 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,936 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,938 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:58,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:58,941 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,022 INFO L628 ElimStorePlain]: treesize reduction 32, result has 77.3 percent of original size [2021-06-05 22:20:59,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:20:59,026 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:547, output treesize:101 [2021-06-05 22:20:59,351 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_363, char_at_5], 6=[char_at_1]} [2021-06-05 22:20:59,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:59,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:59,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:59,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:59,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:59,372 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:59,375 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,508 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 22:20:59,508 INFO L628 ElimStorePlain]: treesize reduction 251, result has 34.1 percent of original size [2021-06-05 22:20:59,508 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:20:59,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:20:59,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:59,516 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:59,519 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:59,523 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:20:59,526 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:59,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:59,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:20:59,572 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:553, output treesize:33 [2021-06-05 22:20:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:20:59,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652987533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:59,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:59,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:20:59,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819620371] [2021-06-05 22:20:59,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:20:59,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:20:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:20:59,648 INFO L87 Difference]: Start difference. First operand 875 states and 2799 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:00,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:00,114 INFO L93 Difference]: Finished difference Result 1006 states and 3193 transitions. [2021-06-05 22:21:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:00,115 INFO L225 Difference]: With dead ends: 1006 [2021-06-05 22:21:00,115 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 22:21:00,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:00,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 22:21:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 860. [2021-06-05 22:21:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.2037252619324796) internal successors, (2752), 859 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2752 transitions. [2021-06-05 22:21:00,124 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2752 transitions. Word has length 24 [2021-06-05 22:21:00,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:00,124 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2752 transitions. [2021-06-05 22:21:00,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2752 transitions. [2021-06-05 22:21:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:00,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:00,125 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:00,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17573 [2021-06-05 22:21:00,325 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:00,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:00,326 INFO L82 PathProgramCache]: Analyzing trace with hash -670279874, now seen corresponding path program 195 times [2021-06-05 22:21:00,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:00,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005663002] [2021-06-05 22:21:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:00,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:00,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005663002] [2021-06-05 22:21:00,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005663002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:00,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300031771] [2021-06-05 22:21:00,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:00,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:21:00,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:00,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:00,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:00,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:00,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:00,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:00,527 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:21:00,527 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:21:00,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:21:00,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:21:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:00,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300031771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:00,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:00,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:21:00,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989511872] [2021-06-05 22:21:00,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:21:00,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:21:00,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:21:00,592 INFO L87 Difference]: Start difference. First operand 860 states and 2752 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:00,675 INFO L93 Difference]: Finished difference Result 998 states and 3146 transitions. [2021-06-05 22:21:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:21:00,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:00,684 INFO L225 Difference]: With dead ends: 998 [2021-06-05 22:21:00,684 INFO L226 Difference]: Without dead ends: 947 [2021-06-05 22:21:00,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:21:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-05 22:21:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 866. [2021-06-05 22:21:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.1988439306358383) internal successors, (2767), 865 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2767 transitions. [2021-06-05 22:21:00,693 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2767 transitions. Word has length 24 [2021-06-05 22:21:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:00,693 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2767 transitions. [2021-06-05 22:21:00,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2767 transitions. [2021-06-05 22:21:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:00,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:00,694 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:00,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17608,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:00,894 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:00,895 INFO L82 PathProgramCache]: Analyzing trace with hash 306442364, now seen corresponding path program 196 times [2021-06-05 22:21:00,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:00,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599980332] [2021-06-05 22:21:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:01,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:01,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599980332] [2021-06-05 22:21:01,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599980332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:01,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608573722] [2021-06-05 22:21:01,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:01,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:01,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608573722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:01,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:01,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:21:01,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591030796] [2021-06-05 22:21:01,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:21:01,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:21:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:01,352 INFO L87 Difference]: Start difference. First operand 866 states and 2767 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:03,536 INFO L93 Difference]: Finished difference Result 1604 states and 4840 transitions. [2021-06-05 22:21:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:21:03,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:03,538 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 22:21:03,538 INFO L226 Difference]: Without dead ends: 1466 [2021-06-05 22:21:03,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1822.3ms TimeCoverageRelationStatistics Valid=463, Invalid=4229, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:21:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-06-05 22:21:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 856. [2021-06-05 22:21:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.1871345029239766) internal successors, (2725), 855 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2725 transitions. [2021-06-05 22:21:03,549 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2725 transitions. Word has length 24 [2021-06-05 22:21:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:03,550 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2725 transitions. [2021-06-05 22:21:03,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2725 transitions. [2021-06-05 22:21:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:03,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:03,551 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:03,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17621 [2021-06-05 22:21:03,751 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:03,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1774624886, now seen corresponding path program 197 times [2021-06-05 22:21:03,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:03,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791294356] [2021-06-05 22:21:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:03,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:03,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791294356] [2021-06-05 22:21:03,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791294356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:03,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045924624] [2021-06-05 22:21:03,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:03,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:04,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:04,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:04,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:04,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:04,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:04,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:04,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:04,100 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,104 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,107 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,111 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,114 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:04,118 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:04,122 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:04,125 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,129 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,132 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,135 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,138 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,141 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,144 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,147 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:04,151 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,154 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,157 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,160 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,163 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,166 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,169 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,172 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:04,174 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:04,309 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-06-05 22:21:04,309 INFO L628 ElimStorePlain]: treesize reduction 122, result has 47.2 percent of original size [2021-06-05 22:21:04,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:21:04,312 INFO L247 ElimStorePlain]: Needed 33 recursive calls to eliminate 2 variables, input treesize:1181, output treesize:101 [2021-06-05 22:21:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:04,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045924624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:04,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:04,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:21:04,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655628392] [2021-06-05 22:21:04,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:21:04,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:04,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:21:04,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:21:04,475 INFO L87 Difference]: Start difference. First operand 856 states and 2725 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:04,809 INFO L93 Difference]: Finished difference Result 993 states and 3113 transitions. [2021-06-05 22:21:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:04,810 INFO L225 Difference]: With dead ends: 993 [2021-06-05 22:21:04,810 INFO L226 Difference]: Without dead ends: 918 [2021-06-05 22:21:04,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-06-05 22:21:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 869. [2021-06-05 22:21:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.1877880184331797) internal successors, (2767), 868 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2767 transitions. [2021-06-05 22:21:04,819 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2767 transitions. Word has length 24 [2021-06-05 22:21:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:04,819 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2767 transitions. [2021-06-05 22:21:04,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2767 transitions. [2021-06-05 22:21:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:04,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:04,820 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:05,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17633 [2021-06-05 22:21:05,020 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:05,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1058216540, now seen corresponding path program 198 times [2021-06-05 22:21:05,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:05,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016039948] [2021-06-05 22:21:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:05,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:05,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016039948] [2021-06-05 22:21:05,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016039948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:05,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766237511] [2021-06-05 22:21:05,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:05,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:21:05,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:05,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766237511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:05,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:05,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:21:05,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885859019] [2021-06-05 22:21:05,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:21:05,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:21:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:05,515 INFO L87 Difference]: Start difference. First operand 869 states and 2767 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:09,110 INFO L93 Difference]: Finished difference Result 1818 states and 5479 transitions. [2021-06-05 22:21:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 22:21:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:09,113 INFO L225 Difference]: With dead ends: 1818 [2021-06-05 22:21:09,113 INFO L226 Difference]: Without dead ends: 1646 [2021-06-05 22:21:09,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 3147.2ms TimeCoverageRelationStatistics Valid=719, Invalid=6937, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 22:21:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-06-05 22:21:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 856. [2021-06-05 22:21:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.1871345029239766) internal successors, (2725), 855 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2725 transitions. [2021-06-05 22:21:09,125 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2725 transitions. Word has length 24 [2021-06-05 22:21:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:09,125 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2725 transitions. [2021-06-05 22:21:09,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2725 transitions. [2021-06-05 22:21:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:09,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:09,126 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:09,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17684 [2021-06-05 22:21:09,326 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:09,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1638081284, now seen corresponding path program 199 times [2021-06-05 22:21:09,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:09,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534304652] [2021-06-05 22:21:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:09,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534304652] [2021-06-05 22:21:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534304652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982396352] [2021-06-05 22:21:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:09,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:09,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:09,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:09,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:09,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:09,572 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:09,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:09,583 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:09,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,590 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,594 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,597 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,600 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,603 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,606 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:09,610 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,613 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,616 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,619 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,622 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,625 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:09,629 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,631 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,634 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:09,637 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:09,721 INFO L628 ElimStorePlain]: treesize reduction 94, result has 53.7 percent of original size [2021-06-05 22:21:09,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:21:09,724 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:907, output treesize:101 [2021-06-05 22:21:10,034 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_370, char_at_5], 6=[char_at_1]} [2021-06-05 22:21:10,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:10,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:10,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:10,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:10,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:10,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:10,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,190 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 22:21:10,191 INFO L628 ElimStorePlain]: treesize reduction 251, result has 34.1 percent of original size [2021-06-05 22:21:10,191 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:21:10,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:10,195 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:10,198 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:10,201 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:10,205 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:10,208 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:10,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:10,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:21:10,254 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:553, output treesize:33 [2021-06-05 22:21:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:10,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982396352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:10,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:10,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:21:10,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003090956] [2021-06-05 22:21:10,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:21:10,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:10,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:21:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:21:10,325 INFO L87 Difference]: Start difference. First operand 856 states and 2725 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:10,591 INFO L93 Difference]: Finished difference Result 988 states and 3107 transitions. [2021-06-05 22:21:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:21:10,591 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:10,593 INFO L225 Difference]: With dead ends: 988 [2021-06-05 22:21:10,593 INFO L226 Difference]: Without dead ends: 937 [2021-06-05 22:21:10,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:21:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-06-05 22:21:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 841. [2021-06-05 22:21:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.1880952380952383) internal successors, (2678), 840 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2678 transitions. [2021-06-05 22:21:10,609 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2678 transitions. Word has length 24 [2021-06-05 22:21:10,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:10,609 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2678 transitions. [2021-06-05 22:21:10,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2678 transitions. [2021-06-05 22:21:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:10,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:10,610 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:10,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17692,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:10,811 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:10,812 INFO L82 PathProgramCache]: Analyzing trace with hash 43642812, now seen corresponding path program 200 times [2021-06-05 22:21:10,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:10,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643312668] [2021-06-05 22:21:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:10,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:10,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643312668] [2021-06-05 22:21:10,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643312668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:10,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607470359] [2021-06-05 22:21:10,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:11,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:11,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:11,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607470359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:11,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:11,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:21:11,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366483279] [2021-06-05 22:21:11,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:21:11,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:11,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:21:11,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:11,230 INFO L87 Difference]: Start difference. First operand 841 states and 2678 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:13,596 INFO L93 Difference]: Finished difference Result 1252 states and 3791 transitions. [2021-06-05 22:21:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:21:13,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:13,598 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 22:21:13,598 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 22:21:13,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1911.8ms TimeCoverageRelationStatistics Valid=363, Invalid=3797, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:21:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 22:21:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 852. [2021-06-05 22:21:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1868390129259696) internal successors, (2712), 851 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2712 transitions. [2021-06-05 22:21:13,607 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2712 transitions. Word has length 24 [2021-06-05 22:21:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:13,607 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2712 transitions. [2021-06-05 22:21:13,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2712 transitions. [2021-06-05 22:21:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:13,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:13,608 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:13,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17763,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:13,809 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:13,809 INFO L82 PathProgramCache]: Analyzing trace with hash -690179434, now seen corresponding path program 201 times [2021-06-05 22:21:13,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:13,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214352872] [2021-06-05 22:21:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:14,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:14,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214352872] [2021-06-05 22:21:14,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214352872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:14,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654210329] [2021-06-05 22:21:14,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:14,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:21:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:14,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:14,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654210329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:14,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:14,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:21:14,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118513752] [2021-06-05 22:21:14,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:21:14,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:14,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:21:14,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:14,262 INFO L87 Difference]: Start difference. First operand 852 states and 2712 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:16,681 INFO L93 Difference]: Finished difference Result 1245 states and 3787 transitions. [2021-06-05 22:21:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:21:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:16,683 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 22:21:16,683 INFO L226 Difference]: Without dead ends: 1104 [2021-06-05 22:21:16,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1981.5ms TimeCoverageRelationStatistics Valid=351, Invalid=3681, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:21:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-05 22:21:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 865. [2021-06-05 22:21:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.1875) internal successors, (2754), 864 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2754 transitions. [2021-06-05 22:21:16,693 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2754 transitions. Word has length 24 [2021-06-05 22:21:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:16,693 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2754 transitions. [2021-06-05 22:21:16,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2754 transitions. [2021-06-05 22:21:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:16,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:16,694 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:16,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17769,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:16,894 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:16,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1406587780, now seen corresponding path program 202 times [2021-06-05 22:21:16,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:16,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050060220] [2021-06-05 22:21:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:16,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:16,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050060220] [2021-06-05 22:21:16,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050060220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:16,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456855036] [2021-06-05 22:21:16,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:17,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:17,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:17,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:17,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456855036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:17,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:17,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:21:17,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020698858] [2021-06-05 22:21:17,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:21:17,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:21:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:21:17,347 INFO L87 Difference]: Start difference. First operand 865 states and 2754 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:17,642 INFO L93 Difference]: Finished difference Result 1111 states and 3465 transitions. [2021-06-05 22:21:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:17,644 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 22:21:17,644 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 22:21:17,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:21:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 22:21:17,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 838. [2021-06-05 22:21:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.1887694145758663) internal successors, (2669), 837 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2669 transitions. [2021-06-05 22:21:17,653 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2669 transitions. Word has length 24 [2021-06-05 22:21:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:17,653 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2669 transitions. [2021-06-05 22:21:17,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2669 transitions. [2021-06-05 22:21:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:17,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:17,654 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:17,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17775 [2021-06-05 22:21:17,854 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash 192081692, now seen corresponding path program 203 times [2021-06-05 22:21:17,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:17,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758055217] [2021-06-05 22:21:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:18,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:18,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758055217] [2021-06-05 22:21:18,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758055217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:18,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249509287] [2021-06-05 22:21:18,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:18,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:21:18,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:18,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:18,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:18,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249509287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:18,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:18,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:21:18,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790335666] [2021-06-05 22:21:18,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:21:18,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:18,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:21:18,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:18,292 INFO L87 Difference]: Start difference. First operand 838 states and 2669 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:19,997 INFO L93 Difference]: Finished difference Result 1297 states and 3962 transitions. [2021-06-05 22:21:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:21:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:19,999 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 22:21:19,999 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 22:21:20,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1402.8ms TimeCoverageRelationStatistics Valid=343, Invalid=3079, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:21:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 22:21:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 836. [2021-06-05 22:21:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.1904191616766466) internal successors, (2664), 835 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2664 transitions. [2021-06-05 22:21:20,009 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2664 transitions. Word has length 24 [2021-06-05 22:21:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:20,009 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2664 transitions. [2021-06-05 22:21:20,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2664 transitions. [2021-06-05 22:21:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:20,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:20,010 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:20,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17850 [2021-06-05 22:21:20,211 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1796984272, now seen corresponding path program 204 times [2021-06-05 22:21:20,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:20,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598673800] [2021-06-05 22:21:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:20,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:20,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598673800] [2021-06-05 22:21:20,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598673800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:20,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621657608] [2021-06-05 22:21:20,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:20,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:21:20,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:20,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:20,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:20,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621657608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:20,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:20,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:21:20,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062584823] [2021-06-05 22:21:20,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:20,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:20,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:20,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:20,506 INFO L87 Difference]: Start difference. First operand 836 states and 2664 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:20,927 INFO L93 Difference]: Finished difference Result 1052 states and 3241 transitions. [2021-06-05 22:21:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:21:20,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:20,929 INFO L225 Difference]: With dead ends: 1052 [2021-06-05 22:21:20,929 INFO L226 Difference]: Without dead ends: 953 [2021-06-05 22:21:20,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-05 22:21:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 832. [2021-06-05 22:21:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.18531889290012) internal successors, (2647), 831 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2647 transitions. [2021-06-05 22:21:20,937 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2647 transitions. Word has length 24 [2021-06-05 22:21:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:20,937 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2647 transitions. [2021-06-05 22:21:20,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2647 transitions. [2021-06-05 22:21:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:20,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:20,938 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:21,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17855,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:21,139 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:21,139 INFO L82 PathProgramCache]: Analyzing trace with hash 307653366, now seen corresponding path program 205 times [2021-06-05 22:21:21,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:21,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596125832] [2021-06-05 22:21:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:21,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:21,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596125832] [2021-06-05 22:21:21,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596125832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:21,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28987810] [2021-06-05 22:21:21,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:21,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:21,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28987810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:21,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:21,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:21:21,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023995239] [2021-06-05 22:21:21,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:21:21,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:21,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:21:21,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:21,593 INFO L87 Difference]: Start difference. First operand 832 states and 2647 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:24,734 INFO L93 Difference]: Finished difference Result 1469 states and 4330 transitions. [2021-06-05 22:21:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:21:24,735 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:24,736 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 22:21:24,736 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 22:21:24,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 2699.2ms TimeCoverageRelationStatistics Valid=478, Invalid=4214, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:21:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 22:21:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 830. [2021-06-05 22:21:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.1761158021712905) internal successors, (2633), 829 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2633 transitions. [2021-06-05 22:21:24,746 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2633 transitions. Word has length 24 [2021-06-05 22:21:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:24,747 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2633 transitions. [2021-06-05 22:21:24,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2633 transitions. [2021-06-05 22:21:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:24,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:24,747 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:24,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17865,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:24,948 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash -804716366, now seen corresponding path program 206 times [2021-06-05 22:21:24,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:24,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672223670] [2021-06-05 22:21:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:25,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:25,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672223670] [2021-06-05 22:21:25,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672223670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:25,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840265675] [2021-06-05 22:21:25,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:25,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:25,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:25,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:25,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:25,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:25,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:25,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,157 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:21:25,157 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:21:25,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:21:25,158 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:21:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:25,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840265675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:25,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:25,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:21:25,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009374168] [2021-06-05 22:21:25,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:21:25,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:21:25,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:21:25,249 INFO L87 Difference]: Start difference. First operand 830 states and 2633 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:25,386 INFO L93 Difference]: Finished difference Result 1056 states and 3302 transitions. [2021-06-05 22:21:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:21:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:25,388 INFO L225 Difference]: With dead ends: 1056 [2021-06-05 22:21:25,388 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 22:21:25,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 22:21:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 835. [2021-06-05 22:21:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.176258992805755) internal successors, (2649), 834 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2649 transitions. [2021-06-05 22:21:25,396 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2649 transitions. Word has length 24 [2021-06-05 22:21:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:25,396 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2649 transitions. [2021-06-05 22:21:25,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2649 transitions. [2021-06-05 22:21:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:25,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:25,397 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:25,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17875 [2021-06-05 22:21:25,598 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash 700347806, now seen corresponding path program 207 times [2021-06-05 22:21:25,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:25,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928547351] [2021-06-05 22:21:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:25,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:25,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928547351] [2021-06-05 22:21:25,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928547351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:25,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318688888] [2021-06-05 22:21:25,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:25,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:21:25,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:25,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:25,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:25,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:25,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,793 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:21:25,794 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:21:25,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:21:25,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:21:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:25,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318688888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:25,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:25,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:21:25,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032320163] [2021-06-05 22:21:25,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:21:25,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:21:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:21:25,880 INFO L87 Difference]: Start difference. First operand 835 states and 2649 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:26,015 INFO L93 Difference]: Finished difference Result 1062 states and 3323 transitions. [2021-06-05 22:21:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:21:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:26,017 INFO L225 Difference]: With dead ends: 1062 [2021-06-05 22:21:26,017 INFO L226 Difference]: Without dead ends: 1011 [2021-06-05 22:21:26,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-06-05 22:21:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 830. [2021-06-05 22:21:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.174909529553679) internal successors, (2632), 829 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2632 transitions. [2021-06-05 22:21:26,025 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2632 transitions. Word has length 24 [2021-06-05 22:21:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:26,025 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2632 transitions. [2021-06-05 22:21:26,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2632 transitions. [2021-06-05 22:21:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:26,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:26,026 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:26,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17887,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:26,227 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:26,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2120692588, now seen corresponding path program 208 times [2021-06-05 22:21:26,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:26,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745439312] [2021-06-05 22:21:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:26,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:26,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745439312] [2021-06-05 22:21:26,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745439312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:26,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557925259] [2021-06-05 22:21:26,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:26,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:26,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:26,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:26,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557925259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:26,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:26,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:21:26,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827963071] [2021-06-05 22:21:26,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:26,552 INFO L87 Difference]: Start difference. First operand 830 states and 2632 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:27,014 INFO L93 Difference]: Finished difference Result 1023 states and 3157 transitions. [2021-06-05 22:21:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:27,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:27,015 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 22:21:27,016 INFO L226 Difference]: Without dead ends: 948 [2021-06-05 22:21:27,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 551.3ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:21:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-06-05 22:21:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 826. [2021-06-05 22:21:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.164848484848485) internal successors, (2611), 825 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2611 transitions. [2021-06-05 22:21:27,024 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2611 transitions. Word has length 24 [2021-06-05 22:21:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:27,024 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2611 transitions. [2021-06-05 22:21:27,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2611 transitions. [2021-06-05 22:21:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:27,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:27,025 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:27,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17900,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:27,226 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:27,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1404284242, now seen corresponding path program 209 times [2021-06-05 22:21:27,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:27,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610044276] [2021-06-05 22:21:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:27,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:27,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610044276] [2021-06-05 22:21:27,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610044276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:27,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914665690] [2021-06-05 22:21:27,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:27,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:21:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:21:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:27,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914665690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:27,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:27,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:21:27,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340797907] [2021-06-05 22:21:27,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:21:27,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:27,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:21:27,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:27,733 INFO L87 Difference]: Start difference. First operand 826 states and 2611 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:31,545 INFO L93 Difference]: Finished difference Result 1790 states and 5218 transitions. [2021-06-05 22:21:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:21:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:31,547 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 22:21:31,547 INFO L226 Difference]: Without dead ends: 1619 [2021-06-05 22:21:31,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 3292.8ms TimeCoverageRelationStatistics Valid=637, Invalid=4619, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:21:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-06-05 22:21:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 789. [2021-06-05 22:21:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.1472081218274113) internal successors, (2480), 788 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2480 transitions. [2021-06-05 22:21:31,558 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2480 transitions. Word has length 24 [2021-06-05 22:21:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:31,558 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2480 transitions. [2021-06-05 22:21:31,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2480 transitions. [2021-06-05 22:21:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:31,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:31,559 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:31,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17906 [2021-06-05 22:21:31,759 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:31,760 INFO L82 PathProgramCache]: Analyzing trace with hash -238074280, now seen corresponding path program 210 times [2021-06-05 22:21:31,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:31,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480428659] [2021-06-05 22:21:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:31,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:31,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480428659] [2021-06-05 22:21:31,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480428659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:31,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479847253] [2021-06-05 22:21:31,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:31,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:21:31,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:31,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:31,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:31,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:32,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:32,026 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:32,030 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,033 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:32,036 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,039 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:32,042 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:32,045 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,047 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,050 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,053 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:32,056 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,059 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,062 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:32,064 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,126 INFO L628 ElimStorePlain]: treesize reduction 50, result has 63.0 percent of original size [2021-06-05 22:21:32,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:21:32,128 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 2 variables, input treesize:647, output treesize:77 [2021-06-05 22:21:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:32,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:32,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:21:32,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:32,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:21:32,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,399 INFO L628 ElimStorePlain]: treesize reduction 98, result has 40.2 percent of original size [2021-06-05 22:21:32,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:32,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:32,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:32,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:32,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:32,449 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:246, output treesize:26 [2021-06-05 22:21:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:32,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479847253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:32,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:32,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:21:32,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201024462] [2021-06-05 22:21:32,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:32,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:32,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:32,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:32,525 INFO L87 Difference]: Start difference. First operand 789 states and 2480 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:33,045 INFO L93 Difference]: Finished difference Result 1026 states and 3136 transitions. [2021-06-05 22:21:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:21:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:33,046 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 22:21:33,046 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 22:21:33,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 22:21:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 784. [2021-06-05 22:21:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.1455938697318007) internal successors, (2463), 783 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2463 transitions. [2021-06-05 22:21:33,055 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2463 transitions. Word has length 24 [2021-06-05 22:21:33,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:33,055 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2463 transitions. [2021-06-05 22:21:33,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2463 transitions. [2021-06-05 22:21:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:33,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:33,056 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:33,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17915,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:33,256 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1853309230, now seen corresponding path program 211 times [2021-06-05 22:21:33,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:33,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151235055] [2021-06-05 22:21:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:33,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151235055] [2021-06-05 22:21:33,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151235055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298861746] [2021-06-05 22:21:33,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:33,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:33,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:33,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:33,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:33,459 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:21:33,459 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-06-05 22:21:33,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:21:33,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:21:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:33,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298861746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:33,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:33,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:21:33,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939721363] [2021-06-05 22:21:33,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:21:33,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:33,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:21:33,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:21:33,554 INFO L87 Difference]: Start difference. First operand 784 states and 2463 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:33,704 INFO L93 Difference]: Finished difference Result 1001 states and 3103 transitions. [2021-06-05 22:21:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:33,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:33,705 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:21:33,705 INFO L226 Difference]: Without dead ends: 950 [2021-06-05 22:21:33,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-05 22:21:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 777. [2021-06-05 22:21:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.143041237113402) internal successors, (2439), 776 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2439 transitions. [2021-06-05 22:21:33,713 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2439 transitions. Word has length 24 [2021-06-05 22:21:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:33,713 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2439 transitions. [2021-06-05 22:21:33,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2439 transitions. [2021-06-05 22:21:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:33,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:33,714 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:33,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17949,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:33,915 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1089839224, now seen corresponding path program 212 times [2021-06-05 22:21:33,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:33,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133324562] [2021-06-05 22:21:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:34,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133324562] [2021-06-05 22:21:34,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133324562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759232456] [2021-06-05 22:21:34,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:34,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:34,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:34,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:34,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:34,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:34,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:34,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:34,167 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,171 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,174 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,178 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,184 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:34,187 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:34,191 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,194 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,197 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,200 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,203 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,206 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,209 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,212 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,215 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,218 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,220 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,339 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-06-05 22:21:34,339 INFO L628 ElimStorePlain]: treesize reduction 64, result has 63.8 percent of original size [2021-06-05 22:21:34,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:21:34,354 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:876, output treesize:103 [2021-06-05 22:21:34,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:34,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:34,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:21:34,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:34,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,607 INFO L628 ElimStorePlain]: treesize reduction 134, result has 35.3 percent of original size [2021-06-05 22:21:34,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:34,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:34,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:34,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:34,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:34,657 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:246, output treesize:26 [2021-06-05 22:21:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:34,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759232456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:34,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:34,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:21:34,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830940577] [2021-06-05 22:21:34,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:21:34,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:21:34,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:21:34,726 INFO L87 Difference]: Start difference. First operand 777 states and 2439 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:35,080 INFO L93 Difference]: Finished difference Result 907 states and 2806 transitions. [2021-06-05 22:21:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:35,082 INFO L225 Difference]: With dead ends: 907 [2021-06-05 22:21:35,082 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 22:21:35,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 22:21:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 730. [2021-06-05 22:21:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.146776406035665) internal successors, (2294), 729 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2294 transitions. [2021-06-05 22:21:35,089 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2294 transitions. Word has length 24 [2021-06-05 22:21:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:35,089 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 2294 transitions. [2021-06-05 22:21:35,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2294 transitions. [2021-06-05 22:21:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:35,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:35,090 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:35,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17963 [2021-06-05 22:21:35,291 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:35,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1353802050, now seen corresponding path program 213 times [2021-06-05 22:21:35,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:35,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195316212] [2021-06-05 22:21:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:35,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195316212] [2021-06-05 22:21:35,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195316212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637746314] [2021-06-05 22:21:35,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:35,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:21:35,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:35,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:35,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:35,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:35,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:35,511 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 22:21:35,512 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:21:35,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:21:35,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:101, output treesize:45 [2021-06-05 22:21:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:35,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637746314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:35,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:35,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:21:35,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509883688] [2021-06-05 22:21:35,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:21:35,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:35,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:21:35,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:21:35,611 INFO L87 Difference]: Start difference. First operand 730 states and 2294 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:35,828 INFO L93 Difference]: Finished difference Result 970 states and 2992 transitions. [2021-06-05 22:21:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:35,830 INFO L225 Difference]: With dead ends: 970 [2021-06-05 22:21:35,830 INFO L226 Difference]: Without dead ends: 919 [2021-06-05 22:21:35,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:21:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-06-05 22:21:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 703. [2021-06-05 22:21:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.1296296296296298) internal successors, (2197), 702 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2197 transitions. [2021-06-05 22:21:35,837 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2197 transitions. Word has length 24 [2021-06-05 22:21:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:35,837 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2197 transitions. [2021-06-05 22:21:35,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2197 transitions. [2021-06-05 22:21:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:35,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:35,838 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:36,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17996 [2021-06-05 22:21:36,038 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1932069474, now seen corresponding path program 214 times [2021-06-05 22:21:36,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:36,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892626624] [2021-06-05 22:21:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:36,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:36,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892626624] [2021-06-05 22:21:36,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892626624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:36,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640560329] [2021-06-05 22:21:36,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:36,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:36,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:36,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:36,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:36,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:36,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:36,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:36,244 INFO L628 ElimStorePlain]: treesize reduction 40, result has 47.4 percent of original size [2021-06-05 22:21:36,244 INFO L518 ElimStorePlain]: Eliminatee char_at_5 vanished before elimination [2021-06-05 22:21:36,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:21:36,246 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:36 [2021-06-05 22:21:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:36,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640560329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:36,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:36,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:21:36,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614085341] [2021-06-05 22:21:36,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:21:36,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:21:36,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:21:36,575 INFO L87 Difference]: Start difference. First operand 703 states and 2197 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:36,799 INFO L93 Difference]: Finished difference Result 874 states and 2670 transitions. [2021-06-05 22:21:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:36,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:36,800 INFO L225 Difference]: With dead ends: 874 [2021-06-05 22:21:36,800 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 22:21:36,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:21:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 22:21:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 630. [2021-06-05 22:21:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.0906200317965022) internal successors, (1944), 629 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1944 transitions. [2021-06-05 22:21:36,806 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1944 transitions. Word has length 24 [2021-06-05 22:21:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:36,806 INFO L482 AbstractCegarLoop]: Abstraction has 630 states and 1944 transitions. [2021-06-05 22:21:36,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1944 transitions. [2021-06-05 22:21:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:36,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:36,807 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:37,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18011,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:37,008 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:37,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2097368496, now seen corresponding path program 215 times [2021-06-05 22:21:37,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:37,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334207512] [2021-06-05 22:21:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:37,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:37,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334207512] [2021-06-05 22:21:37,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334207512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:37,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609930770] [2021-06-05 22:21:37,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:37,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:21:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:37,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:37,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:21:37,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:37,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:37,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:37,373 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,376 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:37,379 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,382 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,385 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,387 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,389 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,392 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,394 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,443 INFO L628 ElimStorePlain]: treesize reduction 24, result has 74.2 percent of original size [2021-06-05 22:21:37,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:21:37,446 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:37,448 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:21:37,451 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,475 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:21:37,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:37,476 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 3 variables, input treesize:449, output treesize:16 [2021-06-05 22:21:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:37,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609930770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:37,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:37,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:21:37,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213111288] [2021-06-05 22:21:37,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:21:37,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:37,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:21:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:21:37,513 INFO L87 Difference]: Start difference. First operand 630 states and 1944 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:37,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:37,680 INFO L93 Difference]: Finished difference Result 852 states and 2604 transitions. [2021-06-05 22:21:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:21:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:37,681 INFO L225 Difference]: With dead ends: 852 [2021-06-05 22:21:37,681 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 22:21:37,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 22:21:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 668. [2021-06-05 22:21:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.100449775112444) internal successors, (2068), 667 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2068 transitions. [2021-06-05 22:21:37,688 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2068 transitions. Word has length 24 [2021-06-05 22:21:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:37,688 INFO L482 AbstractCegarLoop]: Abstraction has 668 states and 2068 transitions. [2021-06-05 22:21:37,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2068 transitions. [2021-06-05 22:21:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:21:37,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:37,689 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:37,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18099 [2021-06-05 22:21:37,889 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1734018270, now seen corresponding path program 216 times [2021-06-05 22:21:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:37,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679551867] [2021-06-05 22:21:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:21:38,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:38,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679551867] [2021-06-05 22:21:38,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679551867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:38,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879995578] [2021-06-05 22:21:38,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:38,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:21:38,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:38,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:21:38,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:38,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879995578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:38,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:38,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:21:38,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845812924] [2021-06-05 22:21:38,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:21:38,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:38,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:21:38,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:38,204 INFO L87 Difference]: Start difference. First operand 668 states and 2068 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:42,185 INFO L93 Difference]: Finished difference Result 1628 states and 4853 transitions. [2021-06-05 22:21:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 22:21:42,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:21:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:42,187 INFO L225 Difference]: With dead ends: 1628 [2021-06-05 22:21:42,187 INFO L226 Difference]: Without dead ends: 1444 [2021-06-05 22:21:42,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2903 ImplicationChecksByTransitivity, 3039.2ms TimeCoverageRelationStatistics Valid=853, Invalid=7889, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 22:21:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-06-05 22:21:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 755. [2021-06-05 22:21:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.1392572944297084) internal successors, (2367), 754 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2367 transitions. [2021-06-05 22:21:42,197 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2367 transitions. Word has length 24 [2021-06-05 22:21:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:42,197 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2367 transitions. [2021-06-05 22:21:42,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2367 transitions. [2021-06-05 22:21:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:21:42,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:42,198 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:42,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18183,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:42,398 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:42,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1435274931, now seen corresponding path program 217 times [2021-06-05 22:21:42,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:42,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124420839] [2021-06-05 22:21:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:21:42,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:42,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124420839] [2021-06-05 22:21:42,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124420839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:42,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952953791] [2021-06-05 22:21:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:21:42,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:42,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952953791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:42,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:42,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 22:21:42,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257661061] [2021-06-05 22:21:42,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:21:42,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:21:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:21:42,688 INFO L87 Difference]: Start difference. First operand 755 states and 2367 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:43,273 INFO L93 Difference]: Finished difference Result 1144 states and 3456 transitions. [2021-06-05 22:21:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:21:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:21:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:43,275 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 22:21:43,275 INFO L226 Difference]: Without dead ends: 1037 [2021-06-05 22:21:43,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:21:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-05 22:21:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 761. [2021-06-05 22:21:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.1710526315789473) internal successors, (2410), 760 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2410 transitions. [2021-06-05 22:21:43,283 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2410 transitions. Word has length 25 [2021-06-05 22:21:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:43,283 INFO L482 AbstractCegarLoop]: Abstraction has 761 states and 2410 transitions. [2021-06-05 22:21:43,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2410 transitions. [2021-06-05 22:21:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:21:43,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:43,284 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:43,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18191,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:43,484 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash -192283707, now seen corresponding path program 218 times [2021-06-05 22:21:43,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:43,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262145198] [2021-06-05 22:21:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:43,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262145198] [2021-06-05 22:21:43,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262145198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:43,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096438127] [2021-06-05 22:21:43,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:43,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:43,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:43,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:21:43,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 22:21:43,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 22:21:43,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 22:21:43,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 22:21:43,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 22:21:43,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:43,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 22:21:43,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:43,779 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,809 INFO L628 ElimStorePlain]: treesize reduction 17, result has 75.4 percent of original size [2021-06-05 22:21:43,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:43,809 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:263, output treesize:52 [2021-06-05 22:21:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:43,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096438127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:43,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:43,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 22:21:43,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173560284] [2021-06-05 22:21:43,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:21:43,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:21:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:43,911 INFO L87 Difference]: Start difference. First operand 761 states and 2410 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:44,383 INFO L93 Difference]: Finished difference Result 1031 states and 3129 transitions. [2021-06-05 22:21:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:21:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:21:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:44,385 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 22:21:44,385 INFO L226 Difference]: Without dead ends: 1004 [2021-06-05 22:21:44,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 596.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-06-05 22:21:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 775. [2021-06-05 22:21:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.156330749354005) internal successors, (2443), 774 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2443 transitions. [2021-06-05 22:21:44,393 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2443 transitions. Word has length 25 [2021-06-05 22:21:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:44,393 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2443 transitions. [2021-06-05 22:21:44,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2443 transitions. [2021-06-05 22:21:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:21:44,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:44,394 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:44,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18194,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:44,594 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:44,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1846224861, now seen corresponding path program 219 times [2021-06-05 22:21:44,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:44,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977268696] [2021-06-05 22:21:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:21:44,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:44,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977268696] [2021-06-05 22:21:44,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977268696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:44,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276759804] [2021-06-05 22:21:44,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:44,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:21:44,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:44,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:21:44,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:45,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276759804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:45,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:45,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:21:45,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843188396] [2021-06-05 22:21:45,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:21:45,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:45,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:21:45,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:45,000 INFO L87 Difference]: Start difference. First operand 775 states and 2443 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:48,307 INFO L93 Difference]: Finished difference Result 1713 states and 5070 transitions. [2021-06-05 22:21:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:21:48,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:21:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:48,309 INFO L225 Difference]: With dead ends: 1713 [2021-06-05 22:21:48,310 INFO L226 Difference]: Without dead ends: 1583 [2021-06-05 22:21:48,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 2587.2ms TimeCoverageRelationStatistics Valid=550, Invalid=6256, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:21:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-06-05 22:21:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 861. [2021-06-05 22:21:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.167441860465116) internal successors, (2724), 860 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2724 transitions. [2021-06-05 22:21:48,321 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2724 transitions. Word has length 25 [2021-06-05 22:21:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:48,321 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2724 transitions. [2021-06-05 22:21:48,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2724 transitions. [2021-06-05 22:21:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:21:48,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:48,322 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:48,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18201 [2021-06-05 22:21:48,522 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:48,522 INFO L82 PathProgramCache]: Analyzing trace with hash 942151877, now seen corresponding path program 220 times [2021-06-05 22:21:48,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:48,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787637994] [2021-06-05 22:21:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:48,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787637994] [2021-06-05 22:21:48,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787637994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055890750] [2021-06-05 22:21:48,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:48,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:48,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:48,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:21:48,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:48,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055890750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:48,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:48,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:21:48,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900036108] [2021-06-05 22:21:48,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:21:48,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:48,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:21:48,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:48,894 INFO L87 Difference]: Start difference. First operand 861 states and 2724 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:52,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:52,935 INFO L93 Difference]: Finished difference Result 1934 states and 5701 transitions. [2021-06-05 22:21:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 22:21:52,936 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:21:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:52,938 INFO L225 Difference]: With dead ends: 1934 [2021-06-05 22:21:52,938 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 22:21:52,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4048 ImplicationChecksByTransitivity, 2876.8ms TimeCoverageRelationStatistics Valid=757, Invalid=11233, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 22:21:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 22:21:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 892. [2021-06-05 22:21:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.186307519640853) internal successors, (2839), 891 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2839 transitions. [2021-06-05 22:21:52,950 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2839 transitions. Word has length 25 [2021-06-05 22:21:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:52,950 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2839 transitions. [2021-06-05 22:21:52,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2839 transitions. [2021-06-05 22:21:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:21:52,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:52,951 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:53,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18203,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:53,152 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:53,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1918874115, now seen corresponding path program 221 times [2021-06-05 22:21:53,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:53,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73878784] [2021-06-05 22:21:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:53,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:53,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73878784] [2021-06-05 22:21:53,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73878784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:53,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598800891] [2021-06-05 22:21:53,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:53,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:21:53,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:53,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:21:53,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:53,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598800891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:53,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:53,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:21:53,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787287867] [2021-06-05 22:21:53,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:21:53,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:21:53,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:53,525 INFO L87 Difference]: Start difference. First operand 892 states and 2839 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:57,357 INFO L93 Difference]: Finished difference Result 1759 states and 5137 transitions. [2021-06-05 22:21:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 22:21:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:21:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:57,359 INFO L225 Difference]: With dead ends: 1759 [2021-06-05 22:21:57,359 INFO L226 Difference]: Without dead ends: 1663 [2021-06-05 22:21:57,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3972 ImplicationChecksByTransitivity, 2932.7ms TimeCoverageRelationStatistics Valid=778, Invalid=10994, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 22:21:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-06-05 22:21:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 939. [2021-06-05 22:21:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.216417910447761) internal successors, (3017), 938 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 3017 transitions. [2021-06-05 22:21:57,371 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 3017 transitions. Word has length 25 [2021-06-05 22:21:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:57,371 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 3017 transitions. [2021-06-05 22:21:57,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 3017 transitions. [2021-06-05 22:21:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:21:57,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:57,372 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:57,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18207,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:57,572 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1548265027, now seen corresponding path program 222 times [2021-06-05 22:21:57,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:57,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942567504] [2021-06-05 22:21:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:21:57,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:57,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942567504] [2021-06-05 22:21:57,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942567504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:57,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811237294] [2021-06-05 22:21:57,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:57,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:21:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:21:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:58,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811237294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:58,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:58,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:21:58,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131906579] [2021-06-05 22:21:58,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:21:58,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:58,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:21:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:58,010 INFO L87 Difference]: Start difference. First operand 939 states and 3017 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:01,055 INFO L93 Difference]: Finished difference Result 1660 states and 5005 transitions. [2021-06-05 22:22:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:22:01,056 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:01,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:01,058 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 22:22:01,058 INFO L226 Difference]: Without dead ends: 1541 [2021-06-05 22:22:01,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 2206.4ms TimeCoverageRelationStatistics Valid=485, Invalid=5835, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:22:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-06-05 22:22:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 970. [2021-06-05 22:22:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 3.2218782249742004) internal successors, (3122), 969 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 3122 transitions. [2021-06-05 22:22:01,069 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 3122 transitions. Word has length 25 [2021-06-05 22:22:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:01,069 INFO L482 AbstractCegarLoop]: Abstraction has 970 states and 3122 transitions. [2021-06-05 22:22:01,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 3122 transitions. [2021-06-05 22:22:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:01,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:01,070 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:01,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18211 [2021-06-05 22:22:01,271 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:01,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:01,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1842629285, now seen corresponding path program 223 times [2021-06-05 22:22:01,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:01,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849459694] [2021-06-05 22:22:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:01,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849459694] [2021-06-05 22:22:01,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849459694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234776918] [2021-06-05 22:22:01,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:01,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:01,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:01,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234776918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:01,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:01,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:22:01,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244618958] [2021-06-05 22:22:01,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:22:01,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:01,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:22:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:01,660 INFO L87 Difference]: Start difference. First operand 970 states and 3122 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:05,720 INFO L93 Difference]: Finished difference Result 1891 states and 5664 transitions. [2021-06-05 22:22:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 22:22:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:05,722 INFO L225 Difference]: With dead ends: 1891 [2021-06-05 22:22:05,722 INFO L226 Difference]: Without dead ends: 1788 [2021-06-05 22:22:05,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 3235.0ms TimeCoverageRelationStatistics Valid=856, Invalid=9650, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 22:22:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-06-05 22:22:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 988. [2021-06-05 22:22:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.2289766970618032) internal successors, (3187), 987 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3187 transitions. [2021-06-05 22:22:05,735 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3187 transitions. Word has length 25 [2021-06-05 22:22:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:05,736 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 3187 transitions. [2021-06-05 22:22:05,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3187 transitions. [2021-06-05 22:22:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:05,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:05,737 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:05,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18213 [2021-06-05 22:22:05,937 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1475615773, now seen corresponding path program 224 times [2021-06-05 22:22:05,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:05,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740727827] [2021-06-05 22:22:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:06,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740727827] [2021-06-05 22:22:06,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740727827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284147737] [2021-06-05 22:22:06,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:06,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:06,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:06,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:06,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284147737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:06,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:06,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 22:22:06,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318425547] [2021-06-05 22:22:06,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:22:06,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:22:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:22:06,426 INFO L87 Difference]: Start difference. First operand 988 states and 3187 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:07,927 INFO L93 Difference]: Finished difference Result 1369 states and 4247 transitions. [2021-06-05 22:22:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:22:07,928 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:07,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:07,929 INFO L225 Difference]: With dead ends: 1369 [2021-06-05 22:22:07,929 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 22:22:07,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1462.9ms TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:22:07,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 22:22:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 990. [2021-06-05 22:22:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 3.2254802831142566) internal successors, (3190), 989 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 3190 transitions. [2021-06-05 22:22:07,940 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 3190 transitions. Word has length 25 [2021-06-05 22:22:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:07,940 INFO L482 AbstractCegarLoop]: Abstraction has 990 states and 3190 transitions. [2021-06-05 22:22:07,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:07,940 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 3190 transitions. [2021-06-05 22:22:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:07,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:07,941 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:08,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18217,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:08,142 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash -622175035, now seen corresponding path program 225 times [2021-06-05 22:22:08,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:08,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878764893] [2021-06-05 22:22:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:08,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:08,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878764893] [2021-06-05 22:22:08,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878764893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:08,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409373212] [2021-06-05 22:22:08,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:08,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:22:08,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:08,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409373212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:08,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:08,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:22:08,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033923026] [2021-06-05 22:22:08,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:22:08,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:08,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:22:08,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:08,536 INFO L87 Difference]: Start difference. First operand 990 states and 3190 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:12,330 INFO L93 Difference]: Finished difference Result 2038 states and 6128 transitions. [2021-06-05 22:22:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 22:22:12,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:12,333 INFO L225 Difference]: With dead ends: 2038 [2021-06-05 22:22:12,333 INFO L226 Difference]: Without dead ends: 1935 [2021-06-05 22:22:12,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3863 ImplicationChecksByTransitivity, 2752.5ms TimeCoverageRelationStatistics Valid=778, Invalid=10564, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 22:22:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-06-05 22:22:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1045. [2021-06-05 22:22:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.2231800766283527) internal successors, (3365), 1044 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3365 transitions. [2021-06-05 22:22:12,347 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3365 transitions. Word has length 25 [2021-06-05 22:22:12,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:12,347 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3365 transitions. [2021-06-05 22:22:12,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3365 transitions. [2021-06-05 22:22:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:12,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:12,348 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:12,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18221 [2021-06-05 22:22:12,549 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:12,549 INFO L82 PathProgramCache]: Analyzing trace with hash 354547203, now seen corresponding path program 226 times [2021-06-05 22:22:12,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:12,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606193363] [2021-06-05 22:22:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:12,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:12,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606193363] [2021-06-05 22:22:12,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606193363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:12,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566817814] [2021-06-05 22:22:12,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:12,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:12,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:12,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:12,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:22:12,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:22:12,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:22:12,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:12,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:22:12,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:12,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:22:12,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:12,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:22:12,889 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:12,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:12,893 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,921 INFO L628 ElimStorePlain]: treesize reduction 17, result has 73.8 percent of original size [2021-06-05 22:22:12,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:12,922 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:231, output treesize:48 [2021-06-05 22:22:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:12,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566817814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:12,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:12,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 22:22:12,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953164800] [2021-06-05 22:22:12,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:12,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:12,967 INFO L87 Difference]: Start difference. First operand 1045 states and 3365 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:13,521 INFO L93 Difference]: Finished difference Result 1320 states and 4112 transitions. [2021-06-05 22:22:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:22:13,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:13,523 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 22:22:13,523 INFO L226 Difference]: Without dead ends: 1300 [2021-06-05 22:22:13,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 614.0ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:22:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-06-05 22:22:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1041. [2021-06-05 22:22:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 3.2278846153846152) internal successors, (3357), 1040 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 3357 transitions. [2021-06-05 22:22:13,534 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 3357 transitions. Word has length 25 [2021-06-05 22:22:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:13,534 INFO L482 AbstractCegarLoop]: Abstraction has 1041 states and 3357 transitions. [2021-06-05 22:22:13,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 3357 transitions. [2021-06-05 22:22:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:13,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:13,535 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:13,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18225,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:13,735 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:13,735 INFO L82 PathProgramCache]: Analyzing trace with hash 596730845, now seen corresponding path program 227 times [2021-06-05 22:22:13,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:13,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647961789] [2021-06-05 22:22:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647961789] [2021-06-05 22:22:13,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647961789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354968827] [2021-06-05 22:22:13,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:13,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:22:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:13,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:14,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354968827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:14,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:14,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:22:14,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620760863] [2021-06-05 22:22:14,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:22:14,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:14,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:22:14,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:14,137 INFO L87 Difference]: Start difference. First operand 1041 states and 3357 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:17,348 INFO L93 Difference]: Finished difference Result 1849 states and 5599 transitions. [2021-06-05 22:22:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:22:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:17,350 INFO L225 Difference]: With dead ends: 1849 [2021-06-05 22:22:17,350 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 22:22:17,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 2537.3ms TimeCoverageRelationStatistics Valid=525, Invalid=6447, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 22:22:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 22:22:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1056. [2021-06-05 22:22:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.233175355450237) internal successors, (3411), 1055 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3411 transitions. [2021-06-05 22:22:17,363 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3411 transitions. Word has length 25 [2021-06-05 22:22:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:17,363 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 3411 transitions. [2021-06-05 22:22:17,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3411 transitions. [2021-06-05 22:22:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:17,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:17,365 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:17,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18233 [2021-06-05 22:22:17,565 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:17,565 INFO L82 PathProgramCache]: Analyzing trace with hash -307342139, now seen corresponding path program 228 times [2021-06-05 22:22:17,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:17,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438398081] [2021-06-05 22:22:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:17,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:17,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438398081] [2021-06-05 22:22:17,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438398081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:17,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647138018] [2021-06-05 22:22:17,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:17,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:22:17,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:17,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:22:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:22:17,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647138018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:17,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:17,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:22:17,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123179613] [2021-06-05 22:22:17,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:22:17,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:17,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:22:17,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:22:17,972 INFO L87 Difference]: Start difference. First operand 1056 states and 3411 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:19,235 INFO L93 Difference]: Finished difference Result 1572 states and 4734 transitions. [2021-06-05 22:22:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:22:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:19,237 INFO L225 Difference]: With dead ends: 1572 [2021-06-05 22:22:19,237 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 22:22:19,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1216.3ms TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:22:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 22:22:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1059. [2021-06-05 22:22:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.222117202268431) internal successors, (3409), 1058 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3409 transitions. [2021-06-05 22:22:19,248 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3409 transitions. Word has length 25 [2021-06-05 22:22:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:19,248 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3409 transitions. [2021-06-05 22:22:19,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3409 transitions. [2021-06-05 22:22:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:19,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:19,249 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:19,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18235,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:19,449 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash 935509769, now seen corresponding path program 229 times [2021-06-05 22:22:19,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:19,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946869892] [2021-06-05 22:22:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:19,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:19,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946869892] [2021-06-05 22:22:19,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946869892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:19,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725937260] [2021-06-05 22:22:19,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:19,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:19,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725937260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:19,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:19,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:22:19,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660978597] [2021-06-05 22:22:19,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:22:19,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:19,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:22:19,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:19,838 INFO L87 Difference]: Start difference. First operand 1059 states and 3409 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:22,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:22,754 INFO L93 Difference]: Finished difference Result 2002 states and 6054 transitions. [2021-06-05 22:22:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:22:22,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:22,757 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 22:22:22,757 INFO L226 Difference]: Without dead ends: 1854 [2021-06-05 22:22:22,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 2112.3ms TimeCoverageRelationStatistics Valid=538, Invalid=5942, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:22:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-06-05 22:22:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1119. [2021-06-05 22:22:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.21824686940966) internal successors, (3598), 1118 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3598 transitions. [2021-06-05 22:22:22,770 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3598 transitions. Word has length 25 [2021-06-05 22:22:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:22,770 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3598 transitions. [2021-06-05 22:22:22,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:22,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3598 transitions. [2021-06-05 22:22:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:22,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:22,772 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:22,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18244 [2021-06-05 22:22:22,974 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1320948959, now seen corresponding path program 230 times [2021-06-05 22:22:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:22,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726821475] [2021-06-05 22:22:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:22:23,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:23,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726821475] [2021-06-05 22:22:23,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726821475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:23,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189845101] [2021-06-05 22:22:23,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:23,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:23,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:23,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:23,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:23,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189845101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:23,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:23,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 22:22:23,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75406245] [2021-06-05 22:22:23,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:22:23,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:22:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:22:23,636 INFO L87 Difference]: Start difference. First operand 1119 states and 3598 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:24,018 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2021-06-05 22:22:25,042 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-06-05 22:22:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:25,314 INFO L93 Difference]: Finished difference Result 1665 states and 5080 transitions. [2021-06-05 22:22:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:22:25,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:25,316 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 22:22:25,316 INFO L226 Difference]: Without dead ends: 1433 [2021-06-05 22:22:25,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1667.1ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:22:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-06-05 22:22:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1140. [2021-06-05 22:22:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.215978928884987) internal successors, (3663), 1139 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3663 transitions. [2021-06-05 22:22:25,328 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3663 transitions. Word has length 25 [2021-06-05 22:22:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:25,328 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 3663 transitions. [2021-06-05 22:22:25,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3663 transitions. [2021-06-05 22:22:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:25,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:25,329 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:25,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18246 [2021-06-05 22:22:25,537 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2023485679, now seen corresponding path program 231 times [2021-06-05 22:22:25,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:25,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540273815] [2021-06-05 22:22:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:25,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540273815] [2021-06-05 22:22:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540273815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910627870] [2021-06-05 22:22:25,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:25,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:22:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:25,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:25,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910627870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:25,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:25,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:22:25,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736352075] [2021-06-05 22:22:25,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:22:25,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:25,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:22:25,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:22:25,897 INFO L87 Difference]: Start difference. First operand 1140 states and 3663 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:26,323 INFO L93 Difference]: Finished difference Result 1305 states and 4130 transitions. [2021-06-05 22:22:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:22:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:26,325 INFO L225 Difference]: With dead ends: 1305 [2021-06-05 22:22:26,325 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 22:22:26,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:22:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 22:22:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1149. [2021-06-05 22:22:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.2142857142857144) internal successors, (3690), 1148 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3690 transitions. [2021-06-05 22:22:26,336 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3690 transitions. Word has length 25 [2021-06-05 22:22:26,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:26,336 INFO L482 AbstractCegarLoop]: Abstraction has 1149 states and 3690 transitions. [2021-06-05 22:22:26,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3690 transitions. [2021-06-05 22:22:26,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:26,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:26,337 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:26,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18265 [2021-06-05 22:22:26,538 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:26,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1815140087, now seen corresponding path program 232 times [2021-06-05 22:22:26,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:26,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000435789] [2021-06-05 22:22:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:26,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:26,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000435789] [2021-06-05 22:22:26,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000435789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:26,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597242750] [2021-06-05 22:22:26,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:26,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:26,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:26,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597242750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:26,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:26,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:22:26,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047396259] [2021-06-05 22:22:26,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:22:26,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:26,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:22:26,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:26,971 INFO L87 Difference]: Start difference. First operand 1149 states and 3690 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:28,084 INFO L93 Difference]: Finished difference Result 1366 states and 4311 transitions. [2021-06-05 22:22:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:22:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:28,086 INFO L225 Difference]: With dead ends: 1366 [2021-06-05 22:22:28,086 INFO L226 Difference]: Without dead ends: 1305 [2021-06-05 22:22:28,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:22:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-06-05 22:22:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1146. [2021-06-05 22:22:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2148471615720524) internal successors, (3681), 1145 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3681 transitions. [2021-06-05 22:22:28,097 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3681 transitions. Word has length 25 [2021-06-05 22:22:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:28,097 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3681 transitions. [2021-06-05 22:22:28,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3681 transitions. [2021-06-05 22:22:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:28,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:28,099 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:28,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18268,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:28,315 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash 15022889, now seen corresponding path program 233 times [2021-06-05 22:22:28,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:28,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198573155] [2021-06-05 22:22:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:28,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:28,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198573155] [2021-06-05 22:22:28,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198573155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:28,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249585147] [2021-06-05 22:22:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:28,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:22:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:22:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:28,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:22:28,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:22:28,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:22:28,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:28,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:22:28,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:22:28,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:28,683 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:28,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,744 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:22:28,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:22:28,747 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:22:28,750 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:28,752 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:28,754 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:28,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:28,767 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:225, output treesize:16 [2021-06-05 22:22:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:28,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249585147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:28,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:28,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:22:28,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116998303] [2021-06-05 22:22:28,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:22:28,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:28,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:22:28,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:22:28,805 INFO L87 Difference]: Start difference. First operand 1146 states and 3681 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:29,281 INFO L93 Difference]: Finished difference Result 1625 states and 5133 transitions. [2021-06-05 22:22:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:22:29,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:29,283 INFO L225 Difference]: With dead ends: 1625 [2021-06-05 22:22:29,283 INFO L226 Difference]: Without dead ends: 1538 [2021-06-05 22:22:29,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:22:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-05 22:22:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1150. [2021-06-05 22:22:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.2210617928633596) internal successors, (3701), 1149 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3701 transitions. [2021-06-05 22:22:29,295 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3701 transitions. Word has length 25 [2021-06-05 22:22:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:29,295 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3701 transitions. [2021-06-05 22:22:29,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3701 transitions. [2021-06-05 22:22:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:29,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:29,297 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:29,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18271 [2021-06-05 22:22:29,513 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1453951525, now seen corresponding path program 234 times [2021-06-05 22:22:29,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:29,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629661079] [2021-06-05 22:22:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:29,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:29,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629661079] [2021-06-05 22:22:29,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629661079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:29,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328057271] [2021-06-05 22:22:29,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:29,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:22:29,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:29,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:29,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:29,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328057271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:29,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:29,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 22:22:29,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492415768] [2021-06-05 22:22:29,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:22:29,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:22:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:22:29,953 INFO L87 Difference]: Start difference. First operand 1150 states and 3701 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:30,613 INFO L93 Difference]: Finished difference Result 1386 states and 4406 transitions. [2021-06-05 22:22:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:22:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:30,615 INFO L225 Difference]: With dead ends: 1386 [2021-06-05 22:22:30,615 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 22:22:30,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:22:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 22:22:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1156. [2021-06-05 22:22:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 3.21991341991342) internal successors, (3719), 1155 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3719 transitions. [2021-06-05 22:22:30,627 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3719 transitions. Word has length 25 [2021-06-05 22:22:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:30,627 INFO L482 AbstractCegarLoop]: Abstraction has 1156 states and 3719 transitions. [2021-06-05 22:22:30,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3719 transitions. [2021-06-05 22:22:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:30,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:30,628 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:30,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18324,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:30,828 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:30,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1245605933, now seen corresponding path program 235 times [2021-06-05 22:22:30,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:30,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285864881] [2021-06-05 22:22:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:31,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:31,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285864881] [2021-06-05 22:22:31,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285864881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:31,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328208292] [2021-06-05 22:22:31,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:31,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:31,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328208292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:31,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:31,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 22:22:31,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121560918] [2021-06-05 22:22:31,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:22:31,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:22:31,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:22:31,305 INFO L87 Difference]: Start difference. First operand 1156 states and 3719 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:32,096 INFO L93 Difference]: Finished difference Result 1306 states and 4146 transitions. [2021-06-05 22:22:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:22:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:32,098 INFO L225 Difference]: With dead ends: 1306 [2021-06-05 22:22:32,098 INFO L226 Difference]: Without dead ends: 1286 [2021-06-05 22:22:32,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 810.6ms TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:22:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-06-05 22:22:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1159. [2021-06-05 22:22:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 3.219343696027634) internal successors, (3728), 1158 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 3728 transitions. [2021-06-05 22:22:32,109 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 3728 transitions. Word has length 25 [2021-06-05 22:22:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:32,109 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 3728 transitions. [2021-06-05 22:22:32,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 3728 transitions. [2021-06-05 22:22:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:32,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:32,111 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:32,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18327,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:32,311 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1393514203, now seen corresponding path program 236 times [2021-06-05 22:22:32,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:32,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961954584] [2021-06-05 22:22:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:32,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:32,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961954584] [2021-06-05 22:22:32,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961954584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:32,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247438543] [2021-06-05 22:22:32,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:32,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:32,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247438543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:32,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:32,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:22:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910675283] [2021-06-05 22:22:32,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:22:32,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:32,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:22:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:32,718 INFO L87 Difference]: Start difference. First operand 1159 states and 3728 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:34,038 INFO L93 Difference]: Finished difference Result 1408 states and 4457 transitions. [2021-06-05 22:22:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:22:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:34,040 INFO L225 Difference]: With dead ends: 1408 [2021-06-05 22:22:34,040 INFO L226 Difference]: Without dead ends: 1367 [2021-06-05 22:22:34,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1140.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:22:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-05 22:22:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1153. [2021-06-05 22:22:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 3.220486111111111) internal successors, (3710), 1152 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3710 transitions. [2021-06-05 22:22:34,051 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3710 transitions. Word has length 25 [2021-06-05 22:22:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:34,051 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3710 transitions. [2021-06-05 22:22:34,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3710 transitions. [2021-06-05 22:22:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:34,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:34,053 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:34,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18330 [2021-06-05 22:22:34,253 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash 584557043, now seen corresponding path program 237 times [2021-06-05 22:22:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:34,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518082625] [2021-06-05 22:22:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:34,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:34,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518082625] [2021-06-05 22:22:34,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518082625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:34,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956528480] [2021-06-05 22:22:34,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:34,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:22:34,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:34,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:34,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956528480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:34,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:34,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 22:22:34,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296899392] [2021-06-05 22:22:34,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:22:34,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:34,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:22:34,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:22:34,754 INFO L87 Difference]: Start difference. First operand 1153 states and 3710 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:35,559 INFO L93 Difference]: Finished difference Result 1302 states and 4133 transitions. [2021-06-05 22:22:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:22:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:35,561 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 22:22:35,561 INFO L226 Difference]: Without dead ends: 1282 [2021-06-05 22:22:35,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 782.6ms TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:22:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-05 22:22:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1159. [2021-06-05 22:22:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 3.219343696027634) internal successors, (3728), 1158 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 3728 transitions. [2021-06-05 22:22:35,572 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 3728 transitions. Word has length 25 [2021-06-05 22:22:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:35,573 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 3728 transitions. [2021-06-05 22:22:35,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 3728 transitions. [2021-06-05 22:22:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:35,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:35,574 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:35,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18335 [2021-06-05 22:22:35,789 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1071290117, now seen corresponding path program 238 times [2021-06-05 22:22:35,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:35,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367225865] [2021-06-05 22:22:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:35,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:35,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367225865] [2021-06-05 22:22:35,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367225865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:35,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612217385] [2021-06-05 22:22:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:36,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:36,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:36,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612217385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:36,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:36,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 22:22:36,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866835647] [2021-06-05 22:22:36,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:22:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:22:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:22:36,314 INFO L87 Difference]: Start difference. First operand 1159 states and 3728 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:37,419 INFO L93 Difference]: Finished difference Result 1414 states and 4472 transitions. [2021-06-05 22:22:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:22:37,419 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:37,421 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 22:22:37,421 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 22:22:37,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1030.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:22:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 22:22:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1168. [2021-06-05 22:22:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.2245072836332476) internal successors, (3763), 1167 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3763 transitions. [2021-06-05 22:22:37,435 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3763 transitions. Word has length 25 [2021-06-05 22:22:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:37,435 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3763 transitions. [2021-06-05 22:22:37,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3763 transitions. [2021-06-05 22:22:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:37,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:37,436 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:37,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18338,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:37,652 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1341303481, now seen corresponding path program 239 times [2021-06-05 22:22:37,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:37,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603784635] [2021-06-05 22:22:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:37,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603784635] [2021-06-05 22:22:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603784635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933812098] [2021-06-05 22:22:37,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:37,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:22:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:38,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933812098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:38,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:38,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:22:38,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117577180] [2021-06-05 22:22:38,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:22:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:22:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:22:38,075 INFO L87 Difference]: Start difference. First operand 1168 states and 3763 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:38,530 INFO L93 Difference]: Finished difference Result 1317 states and 4195 transitions. [2021-06-05 22:22:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:22:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:38,532 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 22:22:38,532 INFO L226 Difference]: Without dead ends: 1317 [2021-06-05 22:22:38,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:22:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-05 22:22:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1156. [2021-06-05 22:22:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 3.21991341991342) internal successors, (3719), 1155 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3719 transitions. [2021-06-05 22:22:38,543 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3719 transitions. Word has length 25 [2021-06-05 22:22:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:38,543 INFO L482 AbstractCegarLoop]: Abstraction has 1156 states and 3719 transitions. [2021-06-05 22:22:38,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3719 transitions. [2021-06-05 22:22:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:38,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:38,545 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:38,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18343,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:38,752 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:38,752 INFO L82 PathProgramCache]: Analyzing trace with hash -319515941, now seen corresponding path program 240 times [2021-06-05 22:22:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:38,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73816252] [2021-06-05 22:22:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:39,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:39,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73816252] [2021-06-05 22:22:39,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73816252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:39,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398065826] [2021-06-05 22:22:39,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:39,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:39,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:39,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:39,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:39,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398065826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:39,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:39,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 22:22:39,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814547938] [2021-06-05 22:22:39,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:22:39,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:39,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:22:39,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:22:39,353 INFO L87 Difference]: Start difference. First operand 1156 states and 3719 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:41,191 INFO L93 Difference]: Finished difference Result 1820 states and 5581 transitions. [2021-06-05 22:22:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:22:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:41,194 INFO L225 Difference]: With dead ends: 1820 [2021-06-05 22:22:41,194 INFO L226 Difference]: Without dead ends: 1803 [2021-06-05 22:22:41,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1567.8ms TimeCoverageRelationStatistics Valid=322, Invalid=2434, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:22:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-06-05 22:22:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1171. [2021-06-05 22:22:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.2264957264957266) internal successors, (3775), 1170 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3775 transitions. [2021-06-05 22:22:41,218 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3775 transitions. Word has length 25 [2021-06-05 22:22:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:41,218 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3775 transitions. [2021-06-05 22:22:41,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3775 transitions. [2021-06-05 22:22:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:41,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:41,219 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:41,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18348 [2021-06-05 22:22:41,420 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2093077657, now seen corresponding path program 241 times [2021-06-05 22:22:41,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:41,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047578759] [2021-06-05 22:22:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:41,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:41,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047578759] [2021-06-05 22:22:41,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047578759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:41,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439106549] [2021-06-05 22:22:41,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:41,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439106549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:41,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:41,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 22:22:41,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879920845] [2021-06-05 22:22:41,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:22:41,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:41,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:22:41,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:22:41,771 INFO L87 Difference]: Start difference. First operand 1171 states and 3775 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:42,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:42,244 INFO L93 Difference]: Finished difference Result 1385 states and 4385 transitions. [2021-06-05 22:22:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:22:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:42,246 INFO L225 Difference]: With dead ends: 1385 [2021-06-05 22:22:42,246 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 22:22:42,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:22:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 22:22:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1150. [2021-06-05 22:22:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.2210617928633596) internal successors, (3701), 1149 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3701 transitions. [2021-06-05 22:22:42,258 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3701 transitions. Word has length 25 [2021-06-05 22:22:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:42,258 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3701 transitions. [2021-06-05 22:22:42,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3701 transitions. [2021-06-05 22:22:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:42,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:42,259 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:42,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18353 [2021-06-05 22:22:42,460 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2132691607, now seen corresponding path program 242 times [2021-06-05 22:22:42,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:42,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062389753] [2021-06-05 22:22:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:42,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:42,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062389753] [2021-06-05 22:22:42,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062389753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:42,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038546947] [2021-06-05 22:22:42,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:42,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:42,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:42,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038546947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:42,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:42,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 22:22:42,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762904812] [2021-06-05 22:22:42,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:22:42,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:22:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:22:42,818 INFO L87 Difference]: Start difference. First operand 1150 states and 3701 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:43,547 INFO L93 Difference]: Finished difference Result 1412 states and 4477 transitions. [2021-06-05 22:22:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:22:43,547 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:43,549 INFO L225 Difference]: With dead ends: 1412 [2021-06-05 22:22:43,549 INFO L226 Difference]: Without dead ends: 1382 [2021-06-05 22:22:43,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 685.8ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:22:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-06-05 22:22:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1157. [2021-06-05 22:22:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.2171280276816607) internal successors, (3719), 1156 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3719 transitions. [2021-06-05 22:22:43,560 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3719 transitions. Word has length 25 [2021-06-05 22:22:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:43,560 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3719 transitions. [2021-06-05 22:22:43,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3719 transitions. [2021-06-05 22:22:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:43,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:43,562 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:43,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18358,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:43,762 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash 451430729, now seen corresponding path program 243 times [2021-06-05 22:22:43,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:43,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730588913] [2021-06-05 22:22:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:43,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:43,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730588913] [2021-06-05 22:22:43,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730588913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:43,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571935211] [2021-06-05 22:22:43,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:43,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:22:43,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:44,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571935211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:44,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:44,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:22:44,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20296187] [2021-06-05 22:22:44,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:22:44,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:44,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:22:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:44,196 INFO L87 Difference]: Start difference. First operand 1157 states and 3719 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:45,366 INFO L93 Difference]: Finished difference Result 1511 states and 4723 transitions. [2021-06-05 22:22:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:22:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:45,368 INFO L225 Difference]: With dead ends: 1511 [2021-06-05 22:22:45,368 INFO L226 Difference]: Without dead ends: 1432 [2021-06-05 22:22:45,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 992.3ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:22:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-05 22:22:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1169. [2021-06-05 22:22:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.2131849315068495) internal successors, (3753), 1168 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3753 transitions. [2021-06-05 22:22:45,381 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3753 transitions. Word has length 25 [2021-06-05 22:22:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:45,381 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3753 transitions. [2021-06-05 22:22:45,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3753 transitions. [2021-06-05 22:22:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:45,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:45,382 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:45,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18362,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:45,582 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1774442929, now seen corresponding path program 244 times [2021-06-05 22:22:45,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:45,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009384732] [2021-06-05 22:22:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:45,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:45,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009384732] [2021-06-05 22:22:45,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009384732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:45,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118789307] [2021-06-05 22:22:45,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:45,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:45,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:45,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:45,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:45,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118789307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:45,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:45,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:22:45,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362219659] [2021-06-05 22:22:45,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:22:45,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:45,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:22:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:22:45,973 INFO L87 Difference]: Start difference. First operand 1169 states and 3753 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:46,405 INFO L93 Difference]: Finished difference Result 1297 states and 4101 transitions. [2021-06-05 22:22:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:22:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:46,406 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 22:22:46,407 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 22:22:46,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:22:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 22:22:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1153. [2021-06-05 22:22:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 3.2196180555555554) internal successors, (3709), 1152 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3709 transitions. [2021-06-05 22:22:46,418 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3709 transitions. Word has length 25 [2021-06-05 22:22:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:46,418 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3709 transitions. [2021-06-05 22:22:46,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3709 transitions. [2021-06-05 22:22:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:46,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:46,419 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:46,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18366,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:46,619 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash -673044535, now seen corresponding path program 245 times [2021-06-05 22:22:46,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:46,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298840204] [2021-06-05 22:22:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:46,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:46,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298840204] [2021-06-05 22:22:46,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298840204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:46,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268233371] [2021-06-05 22:22:46,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:46,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:22:46,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:46,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:47,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268233371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:47,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:47,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:22:47,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644188260] [2021-06-05 22:22:47,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:22:47,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:22:47,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:22:47,034 INFO L87 Difference]: Start difference. First operand 1153 states and 3709 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:47,575 INFO L93 Difference]: Finished difference Result 1297 states and 4115 transitions. [2021-06-05 22:22:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:22:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:47,577 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 22:22:47,577 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 22:22:47,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 566.1ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:22:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 22:22:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1156. [2021-06-05 22:22:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 3.219047619047619) internal successors, (3718), 1155 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3718 transitions. [2021-06-05 22:22:47,589 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3718 transitions. Word has length 25 [2021-06-05 22:22:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:47,589 INFO L482 AbstractCegarLoop]: Abstraction has 1156 states and 3718 transitions. [2021-06-05 22:22:47,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3718 transitions. [2021-06-05 22:22:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:47,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:47,590 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:47,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18370,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:47,790 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1966075601, now seen corresponding path program 246 times [2021-06-05 22:22:47,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:47,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774361544] [2021-06-05 22:22:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:47,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:47,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774361544] [2021-06-05 22:22:47,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774361544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:47,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687219313] [2021-06-05 22:22:47,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:47,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:47,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:48,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687219313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:48,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:48,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 22:22:48,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105628326] [2021-06-05 22:22:48,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:22:48,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:48,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:22:48,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:22:48,269 INFO L87 Difference]: Start difference. First operand 1156 states and 3718 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:49,433 INFO L93 Difference]: Finished difference Result 1405 states and 4441 transitions. [2021-06-05 22:22:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:22:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:49,435 INFO L225 Difference]: With dead ends: 1405 [2021-06-05 22:22:49,435 INFO L226 Difference]: Without dead ends: 1395 [2021-06-05 22:22:49,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 984.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:22:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-05 22:22:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1165. [2021-06-05 22:22:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.2242268041237114) internal successors, (3753), 1164 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3753 transitions. [2021-06-05 22:22:49,447 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3753 transitions. Word has length 25 [2021-06-05 22:22:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:49,447 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3753 transitions. [2021-06-05 22:22:49,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3753 transitions. [2021-06-05 22:22:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:49,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:49,448 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:49,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18374,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:49,648 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash 83701903, now seen corresponding path program 247 times [2021-06-05 22:22:49,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:49,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005749905] [2021-06-05 22:22:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:22:49,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:49,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005749905] [2021-06-05 22:22:49,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005749905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:49,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717926342] [2021-06-05 22:22:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:49,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:49,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:50,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717926342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:50,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:50,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 22:22:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221253484] [2021-06-05 22:22:50,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:22:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:22:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:22:50,029 INFO L87 Difference]: Start difference. First operand 1165 states and 3753 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:50,737 INFO L93 Difference]: Finished difference Result 1296 states and 4129 transitions. [2021-06-05 22:22:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:22:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:50,739 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 22:22:50,739 INFO L226 Difference]: Without dead ends: 1296 [2021-06-05 22:22:50,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 630.5ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:22:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-05 22:22:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1150. [2021-06-05 22:22:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.2201914708442123) internal successors, (3700), 1149 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3700 transitions. [2021-06-05 22:22:50,750 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3700 transitions. Word has length 25 [2021-06-05 22:22:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:50,750 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3700 transitions. [2021-06-05 22:22:50,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3700 transitions. [2021-06-05 22:22:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:50,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:50,751 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:50,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18380,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:50,952 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2082566179, now seen corresponding path program 248 times [2021-06-05 22:22:50,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:50,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783013471] [2021-06-05 22:22:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:51,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783013471] [2021-06-05 22:22:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783013471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234497906] [2021-06-05 22:22:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:51,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:51,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:51,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:51,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234497906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:51,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:51,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:22:51,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258262361] [2021-06-05 22:22:51,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:22:51,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:51,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:22:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:51,439 INFO L87 Difference]: Start difference. First operand 1150 states and 3700 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:53,550 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 22:22:53,984 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 22:22:54,840 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 22:22:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:56,009 INFO L93 Difference]: Finished difference Result 2084 states and 6267 transitions. [2021-06-05 22:22:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 22:22:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:22:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:56,012 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 22:22:56,012 INFO L226 Difference]: Without dead ends: 1951 [2021-06-05 22:22:56,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 3619.7ms TimeCoverageRelationStatistics Valid=583, Invalid=6727, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:22:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-06-05 22:22:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1168. [2021-06-05 22:22:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.2262210796915167) internal successors, (3765), 1167 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3765 transitions. [2021-06-05 22:22:56,026 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3765 transitions. Word has length 25 [2021-06-05 22:22:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:56,026 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3765 transitions. [2021-06-05 22:22:56,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3765 transitions. [2021-06-05 22:22:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:22:56,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:56,027 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:56,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18386 [2021-06-05 22:22:56,228 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash -40892025, now seen corresponding path program 249 times [2021-06-05 22:22:56,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:56,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080592408] [2021-06-05 22:22:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:56,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080592408] [2021-06-05 22:22:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080592408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865620724] [2021-06-05 22:22:56,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:56,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:22:56,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:22:56,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:56,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865620724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:56,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:56,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:22:56,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191262552] [2021-06-05 22:22:56,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:22:56,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:22:56,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:22:56,745 INFO L87 Difference]: Start difference. First operand 1168 states and 3765 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:57,356 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 22:22:58,724 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-06-05 22:22:58,862 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-05 22:22:59,276 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-06-05 22:22:59,630 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 22:23:00,342 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 22:23:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:02,877 INFO L93 Difference]: Finished difference Result 2656 states and 8043 transitions. [2021-06-05 22:23:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 22:23:02,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:02,881 INFO L225 Difference]: With dead ends: 2656 [2021-06-05 22:23:02,881 INFO L226 Difference]: Without dead ends: 2525 [2021-06-05 22:23:02,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4569 ImplicationChecksByTransitivity, 5248.8ms TimeCoverageRelationStatistics Valid=1258, Invalid=11624, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 22:23:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-06-05 22:23:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1229. [2021-06-05 22:23:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 3.245928338762215) internal successors, (3986), 1228 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3986 transitions. [2021-06-05 22:23:02,899 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3986 transitions. Word has length 25 [2021-06-05 22:23:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:02,899 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 3986 transitions. [2021-06-05 22:23:02,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3986 transitions. [2021-06-05 22:23:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:02,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:02,900 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:03,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18389 [2021-06-05 22:23:03,100 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:03,101 INFO L82 PathProgramCache]: Analyzing trace with hash 919464803, now seen corresponding path program 250 times [2021-06-05 22:23:03,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:03,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233840401] [2021-06-05 22:23:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:03,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233840401] [2021-06-05 22:23:03,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233840401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169320446] [2021-06-05 22:23:03,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:03,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:03,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:03,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:03,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169320446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:03,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:03,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:23:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968973102] [2021-06-05 22:23:03,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:03,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:03,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:03,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:03,618 INFO L87 Difference]: Start difference. First operand 1229 states and 3986 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:04,275 INFO L93 Difference]: Finished difference Result 1515 states and 4798 transitions. [2021-06-05 22:23:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:23:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:04,277 INFO L225 Difference]: With dead ends: 1515 [2021-06-05 22:23:04,277 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 22:23:04,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:23:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 22:23:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1224. [2021-06-05 22:23:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.2461161079313166) internal successors, (3970), 1223 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 3970 transitions. [2021-06-05 22:23:04,290 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 3970 transitions. Word has length 25 [2021-06-05 22:23:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:04,290 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 3970 transitions. [2021-06-05 22:23:04,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 3970 transitions. [2021-06-05 22:23:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:04,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:04,292 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:04,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18394 [2021-06-05 22:23:04,492 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:04,492 INFO L82 PathProgramCache]: Analyzing trace with hash -807007077, now seen corresponding path program 251 times [2021-06-05 22:23:04,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:04,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358626538] [2021-06-05 22:23:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:04,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:04,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358626538] [2021-06-05 22:23:04,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358626538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:04,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890385290] [2021-06-05 22:23:04,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:04,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:23:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:04,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890385290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:04,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:04,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:23:04,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427212871] [2021-06-05 22:23:04,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:04,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:04,919 INFO L87 Difference]: Start difference. First operand 1224 states and 3970 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:05,467 INFO L93 Difference]: Finished difference Result 1391 states and 4446 transitions. [2021-06-05 22:23:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:23:05,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:05,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:05,469 INFO L225 Difference]: With dead ends: 1391 [2021-06-05 22:23:05,469 INFO L226 Difference]: Without dead ends: 1371 [2021-06-05 22:23:05,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 627.6ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:23:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-06-05 22:23:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1232. [2021-06-05 22:23:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.2437043054427295) internal successors, (3993), 1231 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3993 transitions. [2021-06-05 22:23:05,481 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3993 transitions. Word has length 25 [2021-06-05 22:23:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:05,482 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 3993 transitions. [2021-06-05 22:23:05,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3993 transitions. [2021-06-05 22:23:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:05,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:05,483 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:05,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18399,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:05,683 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1832026949, now seen corresponding path program 252 times [2021-06-05 22:23:05,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:05,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443141683] [2021-06-05 22:23:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:05,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:05,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443141683] [2021-06-05 22:23:05,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443141683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:05,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305877404] [2021-06-05 22:23:05,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:05,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:23:05,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:06,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305877404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:06,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:06,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:23:06,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139486992] [2021-06-05 22:23:06,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:23:06,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:06,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:23:06,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:23:06,078 INFO L87 Difference]: Start difference. First operand 1232 states and 3993 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:06,687 INFO L93 Difference]: Finished difference Result 1469 states and 4624 transitions. [2021-06-05 22:23:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:23:06,687 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:06,689 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 22:23:06,689 INFO L226 Difference]: Without dead ends: 1459 [2021-06-05 22:23:06,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:23:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-05 22:23:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1247. [2021-06-05 22:23:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.243980738362761) internal successors, (4042), 1246 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4042 transitions. [2021-06-05 22:23:06,703 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4042 transitions. Word has length 25 [2021-06-05 22:23:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:06,703 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 4042 transitions. [2021-06-05 22:23:06,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4042 transitions. [2021-06-05 22:23:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:06,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:06,704 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:06,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18403 [2021-06-05 22:23:06,904 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash -401308487, now seen corresponding path program 253 times [2021-06-05 22:23:06,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:06,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525484044] [2021-06-05 22:23:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:23:07,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:07,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525484044] [2021-06-05 22:23:07,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525484044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:07,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113319156] [2021-06-05 22:23:07,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:07,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:07,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:07,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113319156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:07,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:07,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 22:23:07,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047753535] [2021-06-05 22:23:07,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:07,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:07,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:07,338 INFO L87 Difference]: Start difference. First operand 1247 states and 4042 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:08,121 INFO L93 Difference]: Finished difference Result 1630 states and 5116 transitions. [2021-06-05 22:23:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:23:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:08,124 INFO L225 Difference]: With dead ends: 1630 [2021-06-05 22:23:08,124 INFO L226 Difference]: Without dead ends: 1562 [2021-06-05 22:23:08,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 752.9ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:23:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-06-05 22:23:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1249. [2021-06-05 22:23:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.249198717948718) internal successors, (4055), 1248 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4055 transitions. [2021-06-05 22:23:08,137 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4055 transitions. Word has length 25 [2021-06-05 22:23:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:08,137 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4055 transitions. [2021-06-05 22:23:08,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:08,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4055 transitions. [2021-06-05 22:23:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:08,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:08,139 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:08,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18409,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:08,339 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash 312927989, now seen corresponding path program 254 times [2021-06-05 22:23:08,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:08,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018825375] [2021-06-05 22:23:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:23:08,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:08,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018825375] [2021-06-05 22:23:08,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018825375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:08,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218065047] [2021-06-05 22:23:08,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:08,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:08,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:08,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218065047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:08,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:08,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 22:23:08,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274188910] [2021-06-05 22:23:08,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:08,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:08,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:08,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:08,715 INFO L87 Difference]: Start difference. First operand 1249 states and 4055 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:09,663 INFO L93 Difference]: Finished difference Result 1464 states and 4648 transitions. [2021-06-05 22:23:09,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:23:09,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:09,665 INFO L225 Difference]: With dead ends: 1464 [2021-06-05 22:23:09,665 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 22:23:09,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 859.6ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:23:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 22:23:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1224. [2021-06-05 22:23:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.2461161079313166) internal successors, (3970), 1223 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 3970 transitions. [2021-06-05 22:23:09,677 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 3970 transitions. Word has length 25 [2021-06-05 22:23:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:09,678 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 3970 transitions. [2021-06-05 22:23:09,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 3970 transitions. [2021-06-05 22:23:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:09,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:09,679 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:09,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18415,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:09,879 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:09,879 INFO L82 PathProgramCache]: Analyzing trace with hash 732111841, now seen corresponding path program 255 times [2021-06-05 22:23:09,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:09,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213564486] [2021-06-05 22:23:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:09,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:09,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213564486] [2021-06-05 22:23:09,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213564486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:09,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891403673] [2021-06-05 22:23:09,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:10,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:23:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:10,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:23:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:10,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:10,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:10,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:10,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:10,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:10,172 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:10,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,182 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,185 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:10,189 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,192 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,195 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,199 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,202 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,205 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:10,209 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,211 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,214 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,217 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,220 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,223 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:10,226 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,228 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:10,232 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,234 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,237 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,251 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,254 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,256 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:10,260 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:10,263 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:10,266 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,268 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,343 INFO L628 ElimStorePlain]: treesize reduction 50, result has 68.9 percent of original size [2021-06-05 22:23:10,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-06-05 22:23:10,346 INFO L247 ElimStorePlain]: Needed 34 recursive calls to eliminate 2 variables, input treesize:1044, output treesize:111 [2021-06-05 22:23:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:10,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891403673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:10,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:10,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:23:10,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212709532] [2021-06-05 22:23:10,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:23:10,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:10,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:23:10,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:23:10,738 INFO L87 Difference]: Start difference. First operand 1224 states and 3970 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:11,509 INFO L93 Difference]: Finished difference Result 1817 states and 5678 transitions. [2021-06-05 22:23:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:23:11,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:11,511 INFO L225 Difference]: With dead ends: 1817 [2021-06-05 22:23:11,512 INFO L226 Difference]: Without dead ends: 1665 [2021-06-05 22:23:11,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 927.1ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:23:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-06-05 22:23:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1247. [2021-06-05 22:23:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.2463884430176564) internal successors, (4045), 1246 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4045 transitions. [2021-06-05 22:23:11,525 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4045 transitions. Word has length 25 [2021-06-05 22:23:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:11,525 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 4045 transitions. [2021-06-05 22:23:11,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4045 transitions. [2021-06-05 22:23:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:11,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:11,526 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:11,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18419 [2021-06-05 22:23:11,727 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:11,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1016068947, now seen corresponding path program 256 times [2021-06-05 22:23:11,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:11,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802980340] [2021-06-05 22:23:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:11,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:11,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802980340] [2021-06-05 22:23:11,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802980340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:11,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473851999] [2021-06-05 22:23:11,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:11,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:11,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:11,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:12,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473851999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:12,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:12,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:23:12,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561116493] [2021-06-05 22:23:12,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:12,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:12,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:12,247 INFO L87 Difference]: Start difference. First operand 1247 states and 4045 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:13,281 INFO L93 Difference]: Finished difference Result 1730 states and 5446 transitions. [2021-06-05 22:23:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:23:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:13,283 INFO L225 Difference]: With dead ends: 1730 [2021-06-05 22:23:13,283 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 22:23:13,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 997.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:23:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 22:23:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1247. [2021-06-05 22:23:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.2463884430176564) internal successors, (4045), 1246 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4045 transitions. [2021-06-05 22:23:13,297 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4045 transitions. Word has length 25 [2021-06-05 22:23:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:13,297 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 4045 transitions. [2021-06-05 22:23:13,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4045 transitions. [2021-06-05 22:23:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:13,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:13,298 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:13,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18464,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:13,499 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:13,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1636938809, now seen corresponding path program 257 times [2021-06-05 22:23:13,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:13,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382212968] [2021-06-05 22:23:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:13,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:13,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382212968] [2021-06-05 22:23:13,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382212968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:13,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192207965] [2021-06-05 22:23:13,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:13,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:23:13,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:13,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:14,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192207965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:14,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:14,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:23:14,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575176288] [2021-06-05 22:23:14,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:14,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:14,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:14,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:14,033 INFO L87 Difference]: Start difference. First operand 1247 states and 4045 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:14,740 INFO L93 Difference]: Finished difference Result 1556 states and 4934 transitions. [2021-06-05 22:23:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:23:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:14,743 INFO L225 Difference]: With dead ends: 1556 [2021-06-05 22:23:14,743 INFO L226 Difference]: Without dead ends: 1556 [2021-06-05 22:23:14,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:23:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-06-05 22:23:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1247. [2021-06-05 22:23:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.2463884430176564) internal successors, (4045), 1246 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4045 transitions. [2021-06-05 22:23:14,756 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4045 transitions. Word has length 25 [2021-06-05 22:23:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:14,756 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 4045 transitions. [2021-06-05 22:23:14,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4045 transitions. [2021-06-05 22:23:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:14,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:14,757 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:14,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18469 [2021-06-05 22:23:14,958 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash 947973923, now seen corresponding path program 258 times [2021-06-05 22:23:14,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:14,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916401415] [2021-06-05 22:23:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:15,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:15,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916401415] [2021-06-05 22:23:15,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916401415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:15,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646481358] [2021-06-05 22:23:15,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:15,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:23:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:15,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646481358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:15,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:15,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 22:23:15,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682759674] [2021-06-05 22:23:15,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:15,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:15,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:15,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:15,375 INFO L87 Difference]: Start difference. First operand 1247 states and 4045 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:16,952 INFO L93 Difference]: Finished difference Result 2088 states and 6447 transitions. [2021-06-05 22:23:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:23:16,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:16,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:16,955 INFO L225 Difference]: With dead ends: 2088 [2021-06-05 22:23:16,955 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 22:23:16,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1438.4ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:23:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 22:23:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1251. [2021-06-05 22:23:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.2528) internal successors, (4066), 1250 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4066 transitions. [2021-06-05 22:23:16,970 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4066 transitions. Word has length 25 [2021-06-05 22:23:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:16,970 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4066 transitions. [2021-06-05 22:23:16,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4066 transitions. [2021-06-05 22:23:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:16,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:16,971 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:17,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18474 [2021-06-05 22:23:17,172 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:17,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:17,172 INFO L82 PathProgramCache]: Analyzing trace with hash -716260329, now seen corresponding path program 259 times [2021-06-05 22:23:17,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:17,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948655357] [2021-06-05 22:23:17,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:17,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:17,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948655357] [2021-06-05 22:23:17,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948655357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:17,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210145887] [2021-06-05 22:23:17,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:17,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:17,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210145887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:17,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:17,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:23:17,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680320328] [2021-06-05 22:23:17,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:17,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:17,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:17,675 INFO L87 Difference]: Start difference. First operand 1251 states and 4066 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:18,452 INFO L93 Difference]: Finished difference Result 1660 states and 5230 transitions. [2021-06-05 22:23:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:23:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:18,455 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 22:23:18,455 INFO L226 Difference]: Without dead ends: 1660 [2021-06-05 22:23:18,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:23:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-06-05 22:23:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1255. [2021-06-05 22:23:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.2583732057416266) internal successors, (4086), 1254 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4086 transitions. [2021-06-05 22:23:18,469 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4086 transitions. Word has length 25 [2021-06-05 22:23:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:18,469 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4086 transitions. [2021-06-05 22:23:18,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:18,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4086 transitions. [2021-06-05 22:23:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:18,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:18,470 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:18,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18481,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:18,671 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:18,671 INFO L82 PathProgramCache]: Analyzing trace with hash 770292423, now seen corresponding path program 260 times [2021-06-05 22:23:18,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:18,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661282975] [2021-06-05 22:23:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:18,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661282975] [2021-06-05 22:23:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661282975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893706089] [2021-06-05 22:23:18,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:18,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:18,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:18,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:19,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893706089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:19,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:19,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:23:19,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33735839] [2021-06-05 22:23:19,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:23:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:23:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:23:19,126 INFO L87 Difference]: Start difference. First operand 1255 states and 4086 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:23,479 INFO L93 Difference]: Finished difference Result 2813 states and 8392 transitions. [2021-06-05 22:23:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 22:23:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:23,483 INFO L225 Difference]: With dead ends: 2813 [2021-06-05 22:23:23,483 INFO L226 Difference]: Without dead ends: 2634 [2021-06-05 22:23:23,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3745 ImplicationChecksByTransitivity, 3100.7ms TimeCoverageRelationStatistics Valid=763, Invalid=9949, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 22:23:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-06-05 22:23:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 1312. [2021-06-05 22:23:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.2852784134248667) internal successors, (4307), 1311 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4307 transitions. [2021-06-05 22:23:23,502 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4307 transitions. Word has length 25 [2021-06-05 22:23:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:23,502 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 4307 transitions. [2021-06-05 22:23:23,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4307 transitions. [2021-06-05 22:23:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:23,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:23,503 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:23,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18488 [2021-06-05 22:23:23,704 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:23,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1500133763, now seen corresponding path program 261 times [2021-06-05 22:23:23,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:23,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996300415] [2021-06-05 22:23:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:23,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:23,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996300415] [2021-06-05 22:23:23,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996300415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:23,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256818176] [2021-06-05 22:23:23,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:23,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:23:23,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:24,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256818176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:24,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:24,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:23:24,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009922225] [2021-06-05 22:23:24,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:23:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:23:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:23:24,207 INFO L87 Difference]: Start difference. First operand 1312 states and 4307 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:28,775 INFO L93 Difference]: Finished difference Result 2826 states and 8546 transitions. [2021-06-05 22:23:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 22:23:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:28,779 INFO L225 Difference]: With dead ends: 2826 [2021-06-05 22:23:28,779 INFO L226 Difference]: Without dead ends: 2751 [2021-06-05 22:23:28,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 3779.5ms TimeCoverageRelationStatistics Valid=885, Invalid=8817, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 22:23:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-06-05 22:23:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 1361. [2021-06-05 22:23:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.3095588235294118) internal successors, (4501), 1360 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4501 transitions. [2021-06-05 22:23:28,800 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4501 transitions. Word has length 25 [2021-06-05 22:23:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:28,800 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4501 transitions. [2021-06-05 22:23:28,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4501 transitions. [2021-06-05 22:23:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:28,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:28,801 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:29,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18495,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:29,002 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:29,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:29,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1977987017, now seen corresponding path program 262 times [2021-06-05 22:23:29,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:29,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673782463] [2021-06-05 22:23:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:29,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:29,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673782463] [2021-06-05 22:23:29,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673782463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:29,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657049972] [2021-06-05 22:23:29,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:29,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:29,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:29,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:29,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657049972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:29,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:29,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 22:23:29,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714365393] [2021-06-05 22:23:29,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:23:29,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:23:29,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:23:29,504 INFO L87 Difference]: Start difference. First operand 1361 states and 4501 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:30,230 INFO L93 Difference]: Finished difference Result 1521 states and 4960 transitions. [2021-06-05 22:23:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:23:30,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:30,232 INFO L225 Difference]: With dead ends: 1521 [2021-06-05 22:23:30,232 INFO L226 Difference]: Without dead ends: 1501 [2021-06-05 22:23:30,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 750.6ms TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:23:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-06-05 22:23:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1368. [2021-06-05 22:23:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.307973664959766) internal successors, (4522), 1367 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4522 transitions. [2021-06-05 22:23:30,245 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4522 transitions. Word has length 25 [2021-06-05 22:23:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:30,245 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4522 transitions. [2021-06-05 22:23:30,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4522 transitions. [2021-06-05 22:23:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:30,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:30,247 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:30,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18502 [2021-06-05 22:23:30,447 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash 322139857, now seen corresponding path program 263 times [2021-06-05 22:23:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:30,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325843481] [2021-06-05 22:23:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:30,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:30,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325843481] [2021-06-05 22:23:30,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325843481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:30,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954684585] [2021-06-05 22:23:30,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:30,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:23:30,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:31,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:23:31,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:31,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:23:31,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:31,194 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:23:31,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,505 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-06-05 22:23:31,505 INFO L628 ElimStorePlain]: treesize reduction 348, result has 51.5 percent of original size [2021-06-05 22:23:31,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,510 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,518 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,645 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 22:23:31,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:31,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,650 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,658 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,779 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 22:23:31,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:31,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,783 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,787 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:31,791 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,908 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 22:23:31,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:31,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 12 xjuncts. [2021-06-05 22:23:31,913 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:849, output treesize:325 [2021-06-05 22:23:32,067 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 66 [2021-06-05 22:23:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:32,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954684585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:32,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:32,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 22:23:32,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9679307] [2021-06-05 22:23:32,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:32,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:32,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:32,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:32,180 INFO L87 Difference]: Start difference. First operand 1368 states and 4522 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:33,324 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 22:23:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:33,502 INFO L93 Difference]: Finished difference Result 1757 states and 5674 transitions. [2021-06-05 22:23:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:23:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:33,505 INFO L225 Difference]: With dead ends: 1757 [2021-06-05 22:23:33,505 INFO L226 Difference]: Without dead ends: 1675 [2021-06-05 22:23:33,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1326.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:23:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-06-05 22:23:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1364. [2021-06-05 22:23:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.310344827586207) internal successors, (4512), 1363 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4512 transitions. [2021-06-05 22:23:33,519 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4512 transitions. Word has length 25 [2021-06-05 22:23:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:33,519 INFO L482 AbstractCegarLoop]: Abstraction has 1364 states and 4512 transitions. [2021-06-05 22:23:33,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4512 transitions. [2021-06-05 22:23:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:33,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:33,520 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:33,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18505,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:33,721 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1263355515, now seen corresponding path program 264 times [2021-06-05 22:23:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:33,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139893658] [2021-06-05 22:23:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:23:33,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:33,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139893658] [2021-06-05 22:23:33,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139893658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:33,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660019833] [2021-06-05 22:23:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:33,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:23:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:33,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:23:33,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:34,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:34,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:34,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:34,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:34,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:34,659 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,663 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,667 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,671 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,674 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,678 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,683 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,687 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,691 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,695 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,699 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,703 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:34,708 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,711 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:34,716 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,720 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,724 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,728 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,732 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,736 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,740 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,743 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,747 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:34,751 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,755 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:34,759 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,763 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,766 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:34,771 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:34,775 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:34,779 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:34,782 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,786 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,790 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:34,794 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,797 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,801 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:34,804 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,808 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,811 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,814 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,818 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,821 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:34,824 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,827 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,830 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,833 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:34,837 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,840 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,843 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,846 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,849 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,851 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,933 INFO L628 ElimStorePlain]: treesize reduction 119, result has 48.5 percent of original size [2021-06-05 22:23:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:34,937 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,939 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:34,942 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:23:34,945 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:34,948 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:34,981 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 22:23:34,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:34,982 INFO L247 ElimStorePlain]: Needed 65 recursive calls to eliminate 3 variables, input treesize:1859, output treesize:24 [2021-06-05 22:23:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:23:35,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660019833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:35,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:35,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:23:35,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889201351] [2021-06-05 22:23:35,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:23:35,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:35,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:23:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:23:35,041 INFO L87 Difference]: Start difference. First operand 1364 states and 4512 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:35,501 INFO L93 Difference]: Finished difference Result 2059 states and 6606 transitions. [2021-06-05 22:23:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:23:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:35,503 INFO L225 Difference]: With dead ends: 2059 [2021-06-05 22:23:35,503 INFO L226 Difference]: Without dead ends: 1946 [2021-06-05 22:23:35,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:23:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-06-05 22:23:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1485. [2021-06-05 22:23:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.338274932614555) internal successors, (4954), 1484 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4954 transitions. [2021-06-05 22:23:35,520 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4954 transitions. Word has length 25 [2021-06-05 22:23:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:35,520 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 4954 transitions. [2021-06-05 22:23:35,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4954 transitions. [2021-06-05 22:23:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:35,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:35,522 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:35,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18594 [2021-06-05 22:23:35,722 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1911676715, now seen corresponding path program 265 times [2021-06-05 22:23:35,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:35,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272265541] [2021-06-05 22:23:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:35,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:35,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272265541] [2021-06-05 22:23:35,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272265541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:35,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274190137] [2021-06-05 22:23:35,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:35,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:36,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274190137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:36,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:36,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:23:36,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983614396] [2021-06-05 22:23:36,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:36,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:36,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:36,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:36,158 INFO L87 Difference]: Start difference. First operand 1485 states and 4954 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:36,608 INFO L93 Difference]: Finished difference Result 1645 states and 5406 transitions. [2021-06-05 22:23:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:23:36,608 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:36,610 INFO L225 Difference]: With dead ends: 1645 [2021-06-05 22:23:36,610 INFO L226 Difference]: Without dead ends: 1625 [2021-06-05 22:23:36,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:23:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-06-05 22:23:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1489. [2021-06-05 22:23:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 3.3373655913978495) internal successors, (4966), 1488 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 4966 transitions. [2021-06-05 22:23:36,624 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 4966 transitions. Word has length 25 [2021-06-05 22:23:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:36,625 INFO L482 AbstractCegarLoop]: Abstraction has 1489 states and 4966 transitions. [2021-06-05 22:23:36,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 4966 transitions. [2021-06-05 22:23:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:36,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:36,626 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:36,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18715,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:36,827 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash -213579749, now seen corresponding path program 266 times [2021-06-05 22:23:36,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:36,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17726443] [2021-06-05 22:23:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:36,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17726443] [2021-06-05 22:23:36,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17726443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201508890] [2021-06-05 22:23:36,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:37,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:37,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:37,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:37,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201508890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:37,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:37,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:23:37,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010235303] [2021-06-05 22:23:37,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:23:37,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:23:37,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:23:37,278 INFO L87 Difference]: Start difference. First operand 1489 states and 4966 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:38,669 INFO L93 Difference]: Finished difference Result 1889 states and 6123 transitions. [2021-06-05 22:23:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:23:38,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:38,671 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 22:23:38,671 INFO L226 Difference]: Without dead ends: 1807 [2021-06-05 22:23:38,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1210.4ms TimeCoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:23:38,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-06-05 22:23:38,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1488. [2021-06-05 22:23:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.3389374579690654) internal successors, (4965), 1487 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 4965 transitions. [2021-06-05 22:23:38,688 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 4965 transitions. Word has length 25 [2021-06-05 22:23:38,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:38,688 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 4965 transitions. [2021-06-05 22:23:38,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 4965 transitions. [2021-06-05 22:23:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:38,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:38,690 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:38,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18719 [2021-06-05 22:23:38,906 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:38,906 INFO L82 PathProgramCache]: Analyzing trace with hash 433423783, now seen corresponding path program 267 times [2021-06-05 22:23:38,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:38,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575213077] [2021-06-05 22:23:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:39,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:39,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575213077] [2021-06-05 22:23:39,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575213077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:39,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089066327] [2021-06-05 22:23:39,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:39,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:23:39,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:23:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:23:39,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089066327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:39,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:39,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 22:23:39,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310691766] [2021-06-05 22:23:39,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:39,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:39,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:39,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:39,401 INFO L87 Difference]: Start difference. First operand 1488 states and 4965 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:42,646 INFO L93 Difference]: Finished difference Result 2962 states and 9289 transitions. [2021-06-05 22:23:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:23:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:42,650 INFO L225 Difference]: With dead ends: 2962 [2021-06-05 22:23:42,650 INFO L226 Difference]: Without dead ends: 2737 [2021-06-05 22:23:42,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 2582.8ms TimeCoverageRelationStatistics Valid=694, Invalid=6112, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:23:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-06-05 22:23:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 1580. [2021-06-05 22:23:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.3622545915136164) internal successors, (5309), 1579 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5309 transitions. [2021-06-05 22:23:42,672 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5309 transitions. Word has length 25 [2021-06-05 22:23:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:42,672 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 5309 transitions. [2021-06-05 22:23:42,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5309 transitions. [2021-06-05 22:23:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:42,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:42,674 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:42,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18725,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:42,874 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1734717929, now seen corresponding path program 268 times [2021-06-05 22:23:42,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:42,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420404853] [2021-06-05 22:23:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:23:43,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420404853] [2021-06-05 22:23:43,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420404853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099064677] [2021-06-05 22:23:43,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:43,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:43,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099064677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:43,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:43,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:23:43,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599581716] [2021-06-05 22:23:43,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:23:43,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:43,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:23:43,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:23:43,287 INFO L87 Difference]: Start difference. First operand 1580 states and 5309 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:44,815 INFO L93 Difference]: Finished difference Result 2141 states and 6951 transitions. [2021-06-05 22:23:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:23:44,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:44,818 INFO L225 Difference]: With dead ends: 2141 [2021-06-05 22:23:44,818 INFO L226 Difference]: Without dead ends: 2034 [2021-06-05 22:23:44,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1167.6ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:23:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-05 22:23:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1567. [2021-06-05 22:23:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.3563218390804597) internal successors, (5256), 1566 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5256 transitions. [2021-06-05 22:23:44,834 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5256 transitions. Word has length 25 [2021-06-05 22:23:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:44,834 INFO L482 AbstractCegarLoop]: Abstraction has 1567 states and 5256 transitions. [2021-06-05 22:23:44,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5256 transitions. [2021-06-05 22:23:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:44,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:44,836 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:45,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18733 [2021-06-05 22:23:45,037 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2140021493, now seen corresponding path program 269 times [2021-06-05 22:23:45,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:45,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150595654] [2021-06-05 22:23:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:45,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:45,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150595654] [2021-06-05 22:23:45,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150595654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:45,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655401249] [2021-06-05 22:23:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:45,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:23:45,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:45,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:45,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:45,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655401249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:45,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:45,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 22:23:45,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748887020] [2021-06-05 22:23:45,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:23:45,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:23:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:23:45,598 INFO L87 Difference]: Start difference. First operand 1567 states and 5256 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:46,454 INFO L93 Difference]: Finished difference Result 1729 states and 5715 transitions. [2021-06-05 22:23:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:23:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:46,456 INFO L225 Difference]: With dead ends: 1729 [2021-06-05 22:23:46,456 INFO L226 Difference]: Without dead ends: 1709 [2021-06-05 22:23:46,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 866.5ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:23:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-06-05 22:23:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1573. [2021-06-05 22:23:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.354961832061069) internal successors, (5274), 1572 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5274 transitions. [2021-06-05 22:23:46,480 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5274 transitions. Word has length 25 [2021-06-05 22:23:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:46,480 INFO L482 AbstractCegarLoop]: Abstraction has 1573 states and 5274 transitions. [2021-06-05 22:23:46,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:46,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5274 transitions. [2021-06-05 22:23:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:46,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:46,482 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:46,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18736 [2021-06-05 22:23:46,683 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash -456848837, now seen corresponding path program 270 times [2021-06-05 22:23:46,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:46,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102663560] [2021-06-05 22:23:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:46,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:46,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102663560] [2021-06-05 22:23:46,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102663560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:46,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708039493] [2021-06-05 22:23:46,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:46,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:23:46,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:46,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:47,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708039493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:47,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:47,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:23:47,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985755547] [2021-06-05 22:23:47,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:23:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:23:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:47,101 INFO L87 Difference]: Start difference. First operand 1573 states and 5274 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:47,688 INFO L93 Difference]: Finished difference Result 1843 states and 6051 transitions. [2021-06-05 22:23:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:23:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:47,690 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 22:23:47,691 INFO L226 Difference]: Without dead ends: 1833 [2021-06-05 22:23:47,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:23:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-06-05 22:23:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1582. [2021-06-05 22:23:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.3561037318153066) internal successors, (5306), 1581 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5306 transitions. [2021-06-05 22:23:47,707 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5306 transitions. Word has length 25 [2021-06-05 22:23:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:47,707 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5306 transitions. [2021-06-05 22:23:47,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5306 transitions. [2021-06-05 22:23:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:47,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:47,709 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:47,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18740 [2021-06-05 22:23:47,909 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:47,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1955744761, now seen corresponding path program 271 times [2021-06-05 22:23:47,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:47,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53267764] [2021-06-05 22:23:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:23:48,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:48,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53267764] [2021-06-05 22:23:48,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53267764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:48,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805391045] [2021-06-05 22:23:48,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:48,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805391045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:48,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:48,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:23:48,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271900405] [2021-06-05 22:23:48,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:23:48,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:48,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:23:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:23:48,322 INFO L87 Difference]: Start difference. First operand 1582 states and 5306 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:50,058 INFO L93 Difference]: Finished difference Result 2111 states and 6784 transitions. [2021-06-05 22:23:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:23:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:50,061 INFO L225 Difference]: With dead ends: 2111 [2021-06-05 22:23:50,061 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 22:23:50,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1447.7ms TimeCoverageRelationStatistics Valid=340, Invalid=1916, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:23:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 22:23:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1486. [2021-06-05 22:23:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.3353535353535353) internal successors, (4953), 1485 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4953 transitions. [2021-06-05 22:23:50,077 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4953 transitions. Word has length 25 [2021-06-05 22:23:50,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:50,078 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4953 transitions. [2021-06-05 22:23:50,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4953 transitions. [2021-06-05 22:23:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:50,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:50,079 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:50,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18746,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:50,280 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash -864460133, now seen corresponding path program 272 times [2021-06-05 22:23:50,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:50,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125209266] [2021-06-05 22:23:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:50,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:50,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125209266] [2021-06-05 22:23:50,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125209266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:50,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028081532] [2021-06-05 22:23:50,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:50,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:50,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:50,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028081532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:50,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:50,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:23:50,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993674232] [2021-06-05 22:23:50,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:23:50,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:50,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:23:50,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:23:50,696 INFO L87 Difference]: Start difference. First operand 1486 states and 4953 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:53,242 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 22:23:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:54,215 INFO L93 Difference]: Finished difference Result 2076 states and 6598 transitions. [2021-06-05 22:23:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 22:23:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:54,218 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 22:23:54,218 INFO L226 Difference]: Without dead ends: 1994 [2021-06-05 22:23:54,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 2902.0ms TimeCoverageRelationStatistics Valid=698, Invalid=6784, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 22:23:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-06-05 22:23:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1488. [2021-06-05 22:23:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.332885003362475) internal successors, (4956), 1487 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 4956 transitions. [2021-06-05 22:23:54,234 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 4956 transitions. Word has length 25 [2021-06-05 22:23:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:54,234 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 4956 transitions. [2021-06-05 22:23:54,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 4956 transitions. [2021-06-05 22:23:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:54,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:54,236 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:54,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18752 [2021-06-05 22:23:54,436 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1768533117, now seen corresponding path program 273 times [2021-06-05 22:23:54,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:54,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547326456] [2021-06-05 22:23:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:54,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:54,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547326456] [2021-06-05 22:23:54,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547326456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:54,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905213924] [2021-06-05 22:23:54,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:54,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:23:54,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:54,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905213924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:54,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:54,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:23:54,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072182200] [2021-06-05 22:23:54,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:23:54,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:54,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:23:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:23:54,814 INFO L87 Difference]: Start difference. First operand 1488 states and 4956 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:57,522 INFO L93 Difference]: Finished difference Result 2188 states and 6883 transitions. [2021-06-05 22:23:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:23:57,523 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:23:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:57,525 INFO L225 Difference]: With dead ends: 2188 [2021-06-05 22:23:57,525 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 22:23:57,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 2068.0ms TimeCoverageRelationStatistics Valid=750, Invalid=7440, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 22:23:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 22:23:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1494. [2021-06-05 22:23:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.330877427997321) internal successors, (4973), 1493 states have internal predecessors, (4973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 4973 transitions. [2021-06-05 22:23:57,543 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 4973 transitions. Word has length 25 [2021-06-05 22:23:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:57,543 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 4973 transitions. [2021-06-05 22:23:57,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 4973 transitions. [2021-06-05 22:23:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:23:57,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:57,544 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:57,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18754 [2021-06-05 22:23:57,745 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1776520513, now seen corresponding path program 274 times [2021-06-05 22:23:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:57,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348244044] [2021-06-05 22:23:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:57,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:57,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348244044] [2021-06-05 22:23:57,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348244044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:57,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841060815] [2021-06-05 22:23:57,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:57,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:57,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:57,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:23:57,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:58,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841060815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:58,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:58,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:23:58,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842048392] [2021-06-05 22:23:58,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:23:58,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:58,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:23:58,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:23:58,143 INFO L87 Difference]: Start difference. First operand 1494 states and 4973 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:01,915 INFO L93 Difference]: Finished difference Result 2442 states and 7599 transitions. [2021-06-05 22:24:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 22:24:01,916 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:01,919 INFO L225 Difference]: With dead ends: 2442 [2021-06-05 22:24:01,919 INFO L226 Difference]: Without dead ends: 2385 [2021-06-05 22:24:01,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3973 ImplicationChecksByTransitivity, 2898.6ms TimeCoverageRelationStatistics Valid=1036, Invalid=10736, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 22:24:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-05 22:24:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1484. [2021-06-05 22:24:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.3364801078894133) internal successors, (4948), 1483 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4948 transitions. [2021-06-05 22:24:01,940 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4948 transitions. Word has length 25 [2021-06-05 22:24:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:01,940 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4948 transitions. [2021-06-05 22:24:01,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4948 transitions. [2021-06-05 22:24:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:01,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:01,942 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:02,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18758,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:02,142 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1619829885, now seen corresponding path program 275 times [2021-06-05 22:24:02,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:02,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289460355] [2021-06-05 22:24:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:02,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:02,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289460355] [2021-06-05 22:24:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289460355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:02,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049141058] [2021-06-05 22:24:02,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:02,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:24:02,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:02,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:02,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049141058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:02,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:02,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:24:02,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773161686] [2021-06-05 22:24:02,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:24:02,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:24:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:24:02,518 INFO L87 Difference]: Start difference. First operand 1484 states and 4948 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:04,818 INFO L93 Difference]: Finished difference Result 2120 states and 6708 transitions. [2021-06-05 22:24:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:24:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:04,821 INFO L225 Difference]: With dead ends: 2120 [2021-06-05 22:24:04,821 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 22:24:04,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1672 ImplicationChecksByTransitivity, 1856.9ms TimeCoverageRelationStatistics Valid=579, Invalid=5273, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 22:24:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 22:24:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1498. [2021-06-05 22:24:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 3.3400133600534403) internal successors, (5000), 1497 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5000 transitions. [2021-06-05 22:24:04,837 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5000 transitions. Word has length 25 [2021-06-05 22:24:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:04,837 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5000 transitions. [2021-06-05 22:24:04,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5000 transitions. [2021-06-05 22:24:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:04,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:04,839 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:05,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18762,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:05,039 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:05,039 INFO L82 PathProgramCache]: Analyzing trace with hash -868055709, now seen corresponding path program 276 times [2021-06-05 22:24:05,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:05,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481205638] [2021-06-05 22:24:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:05,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:05,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481205638] [2021-06-05 22:24:05,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481205638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:05,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850965473] [2021-06-05 22:24:05,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:05,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:24:05,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:05,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:05,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:05,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850965473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:05,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:05,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:05,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114028529] [2021-06-05 22:24:05,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:05,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:05,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:05,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:05,383 INFO L87 Difference]: Start difference. First operand 1498 states and 5000 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:07,464 INFO L93 Difference]: Finished difference Result 2269 states and 7181 transitions. [2021-06-05 22:24:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:24:07,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:07,467 INFO L225 Difference]: With dead ends: 2269 [2021-06-05 22:24:07,468 INFO L226 Difference]: Without dead ends: 2187 [2021-06-05 22:24:07,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 1644.8ms TimeCoverageRelationStatistics Valid=534, Invalid=5472, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:24:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-05 22:24:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1536. [2021-06-05 22:24:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3433224755700324) internal successors, (5132), 1535 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5132 transitions. [2021-06-05 22:24:07,487 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5132 transitions. Word has length 25 [2021-06-05 22:24:07,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:07,487 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 5132 transitions. [2021-06-05 22:24:07,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:07,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5132 transitions. [2021-06-05 22:24:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:07,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:07,489 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:07,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18764 [2021-06-05 22:24:07,689 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash 108666529, now seen corresponding path program 277 times [2021-06-05 22:24:07,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:07,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024215951] [2021-06-05 22:24:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:07,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:07,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024215951] [2021-06-05 22:24:07,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024215951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:07,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978286397] [2021-06-05 22:24:07,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:07,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:08,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978286397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:08,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:08,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 22:24:08,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131223161] [2021-06-05 22:24:08,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:24:08,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:08,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:24:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:24:08,168 INFO L87 Difference]: Start difference. First operand 1536 states and 5132 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:08,998 INFO L93 Difference]: Finished difference Result 1773 states and 5787 transitions. [2021-06-05 22:24:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:24:08,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:09,001 INFO L225 Difference]: With dead ends: 1773 [2021-06-05 22:24:09,001 INFO L226 Difference]: Without dead ends: 1757 [2021-06-05 22:24:09,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 832.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:24:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-06-05 22:24:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1542. [2021-06-05 22:24:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 3.3374432186891627) internal successors, (5143), 1541 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 5143 transitions. [2021-06-05 22:24:09,017 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 5143 transitions. Word has length 25 [2021-06-05 22:24:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:09,017 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 5143 transitions. [2021-06-05 22:24:09,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 5143 transitions. [2021-06-05 22:24:09,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:09,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:09,019 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:09,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18768,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:09,219 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:09,220 INFO L82 PathProgramCache]: Analyzing trace with hash 962107267, now seen corresponding path program 278 times [2021-06-05 22:24:09,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:09,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993542267] [2021-06-05 22:24:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:09,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:09,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993542267] [2021-06-05 22:24:09,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993542267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:09,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249368523] [2021-06-05 22:24:09,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:09,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:09,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:09,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249368523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:09,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:09,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:09,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974312536] [2021-06-05 22:24:09,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:09,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:09,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:09,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:09,570 INFO L87 Difference]: Start difference. First operand 1542 states and 5143 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:11,383 INFO L93 Difference]: Finished difference Result 2381 states and 7568 transitions. [2021-06-05 22:24:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:24:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:11,386 INFO L225 Difference]: With dead ends: 2381 [2021-06-05 22:24:11,386 INFO L226 Difference]: Without dead ends: 2299 [2021-06-05 22:24:11,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 1256.0ms TimeCoverageRelationStatistics Valid=415, Invalid=4415, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:24:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-06-05 22:24:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 1541. [2021-06-05 22:24:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.338961038961039) internal successors, (5142), 1540 states have internal predecessors, (5142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5142 transitions. [2021-06-05 22:24:11,405 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5142 transitions. Word has length 25 [2021-06-05 22:24:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:11,405 INFO L482 AbstractCegarLoop]: Abstraction has 1541 states and 5142 transitions. [2021-06-05 22:24:11,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5142 transitions. [2021-06-05 22:24:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:11,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:11,407 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:11,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18772 [2021-06-05 22:24:11,607 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1938829505, now seen corresponding path program 279 times [2021-06-05 22:24:11,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:11,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33576009] [2021-06-05 22:24:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:11,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:11,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33576009] [2021-06-05 22:24:11,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33576009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:11,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631011749] [2021-06-05 22:24:11,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:11,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:24:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:11,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:11,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:12,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631011749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:12,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:12,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:24:12,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567623473] [2021-06-05 22:24:12,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:24:12,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:24:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:24:12,006 INFO L87 Difference]: Start difference. First operand 1541 states and 5142 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:14,923 INFO L93 Difference]: Finished difference Result 2336 states and 7367 transitions. [2021-06-05 22:24:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:24:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:14,926 INFO L225 Difference]: With dead ends: 2336 [2021-06-05 22:24:14,926 INFO L226 Difference]: Without dead ends: 2283 [2021-06-05 22:24:14,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2210.7ms TimeCoverageRelationStatistics Valid=776, Invalid=7966, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 22:24:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-06-05 22:24:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1564. [2021-06-05 22:24:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.3365323096609085) internal successors, (5215), 1563 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5215 transitions. [2021-06-05 22:24:14,946 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5215 transitions. Word has length 25 [2021-06-05 22:24:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:14,946 INFO L482 AbstractCegarLoop]: Abstraction has 1564 states and 5215 transitions. [2021-06-05 22:24:14,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5215 transitions. [2021-06-05 22:24:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:14,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:14,948 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:15,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18776 [2021-06-05 22:24:15,149 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash -887955269, now seen corresponding path program 280 times [2021-06-05 22:24:15,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:15,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920161104] [2021-06-05 22:24:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:15,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:15,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920161104] [2021-06-05 22:24:15,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920161104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:15,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337572561] [2021-06-05 22:24:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:15,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:15,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:15,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:15,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337572561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:15,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:15,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 22:24:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76456557] [2021-06-05 22:24:15,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:24:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:24:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:24:15,750 INFO L87 Difference]: Start difference. First operand 1564 states and 5215 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:17,920 INFO L93 Difference]: Finished difference Result 1868 states and 6075 transitions. [2021-06-05 22:24:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:24:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:17,923 INFO L225 Difference]: With dead ends: 1868 [2021-06-05 22:24:17,923 INFO L226 Difference]: Without dead ends: 1840 [2021-06-05 22:24:17,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1805.8ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:24:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-06-05 22:24:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1560. [2021-06-05 22:24:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.339961513790892) internal successors, (5207), 1559 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5207 transitions. [2021-06-05 22:24:17,939 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5207 transitions. Word has length 25 [2021-06-05 22:24:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:17,939 INFO L482 AbstractCegarLoop]: Abstraction has 1560 states and 5207 transitions. [2021-06-05 22:24:17,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5207 transitions. [2021-06-05 22:24:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:17,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:17,941 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:18,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18780,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:18,141 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2113954149, now seen corresponding path program 281 times [2021-06-05 22:24:18,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:18,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308144256] [2021-06-05 22:24:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:18,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:18,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308144256] [2021-06-05 22:24:18,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308144256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:18,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151162694] [2021-06-05 22:24:18,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:18,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:24:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:24:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:24:18,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151162694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:18,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:18,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:24:18,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637181364] [2021-06-05 22:24:18,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:24:18,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:18,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:24:18,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:24:18,505 INFO L87 Difference]: Start difference. First operand 1560 states and 5207 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:21,053 INFO L93 Difference]: Finished difference Result 2361 states and 7417 transitions. [2021-06-05 22:24:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:24:21,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:21,055 INFO L225 Difference]: With dead ends: 2361 [2021-06-05 22:24:21,056 INFO L226 Difference]: Without dead ends: 1988 [2021-06-05 22:24:21,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2001.1ms TimeCoverageRelationStatistics Valid=406, Invalid=4850, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:24:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-05 22:24:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1513. [2021-06-05 22:24:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.320767195767196) internal successors, (5021), 1512 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 5021 transitions. [2021-06-05 22:24:21,072 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 5021 transitions. Word has length 25 [2021-06-05 22:24:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:21,072 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 5021 transitions. [2021-06-05 22:24:21,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 5021 transitions. [2021-06-05 22:24:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:21,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:21,073 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:21,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18783 [2021-06-05 22:24:21,279 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash -467246493, now seen corresponding path program 282 times [2021-06-05 22:24:21,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:21,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71151757] [2021-06-05 22:24:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:21,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:21,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71151757] [2021-06-05 22:24:21,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71151757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:21,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892820322] [2021-06-05 22:24:21,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:21,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:24:21,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:21,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892820322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:21,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:21,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:21,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141504141] [2021-06-05 22:24:21,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:21,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:21,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:21,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:21,723 INFO L87 Difference]: Start difference. First operand 1513 states and 5021 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:24,727 INFO L93 Difference]: Finished difference Result 2388 states and 7489 transitions. [2021-06-05 22:24:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:24:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:24,730 INFO L225 Difference]: With dead ends: 2388 [2021-06-05 22:24:24,731 INFO L226 Difference]: Without dead ends: 2256 [2021-06-05 22:24:24,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 2613.1ms TimeCoverageRelationStatistics Valid=503, Invalid=5197, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 22:24:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-06-05 22:24:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1534. [2021-06-05 22:24:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.320939334637965) internal successors, (5091), 1533 states have internal predecessors, (5091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5091 transitions. [2021-06-05 22:24:24,750 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5091 transitions. Word has length 25 [2021-06-05 22:24:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:24,750 INFO L482 AbstractCegarLoop]: Abstraction has 1534 states and 5091 transitions. [2021-06-05 22:24:24,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5091 transitions. [2021-06-05 22:24:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:24,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:24,752 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:24,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18788 [2021-06-05 22:24:24,953 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1597846015, now seen corresponding path program 283 times [2021-06-05 22:24:24,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:24,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574708997] [2021-06-05 22:24:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:25,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:25,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574708997] [2021-06-05 22:24:25,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574708997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:25,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058723807] [2021-06-05 22:24:25,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:25,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:25,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:25,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058723807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:25,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:25,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 22:24:25,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728009474] [2021-06-05 22:24:25,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:24:25,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:24:25,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:24:25,433 INFO L87 Difference]: Start difference. First operand 1534 states and 5091 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:26,531 INFO L93 Difference]: Finished difference Result 2207 states and 6976 transitions. [2021-06-05 22:24:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:24:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:26,534 INFO L225 Difference]: With dead ends: 2207 [2021-06-05 22:24:26,534 INFO L226 Difference]: Without dead ends: 1883 [2021-06-05 22:24:26,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 992.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:24:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-06-05 22:24:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1612. [2021-06-05 22:24:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3128491620111733) internal successors, (5337), 1611 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5337 transitions. [2021-06-05 22:24:26,550 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5337 transitions. Word has length 25 [2021-06-05 22:24:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:26,550 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5337 transitions. [2021-06-05 22:24:26,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:26,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5337 transitions. [2021-06-05 22:24:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:26,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:26,552 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:26,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18791,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:26,752 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash 786410721, now seen corresponding path program 284 times [2021-06-05 22:24:26,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:26,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561941045] [2021-06-05 22:24:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:26,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:26,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561941045] [2021-06-05 22:24:26,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561941045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:26,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722063313] [2021-06-05 22:24:26,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:26,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:26,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:27,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722063313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:27,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:27,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:27,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118197877] [2021-06-05 22:24:27,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:27,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:27,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:27,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:27,199 INFO L87 Difference]: Start difference. First operand 1612 states and 5337 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:29,711 INFO L93 Difference]: Finished difference Result 2714 states and 8439 transitions. [2021-06-05 22:24:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:24:29,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:29,715 INFO L225 Difference]: With dead ends: 2714 [2021-06-05 22:24:29,715 INFO L226 Difference]: Without dead ends: 2578 [2021-06-05 22:24:29,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1777.9ms TimeCoverageRelationStatistics Valid=424, Invalid=4546, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:24:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-06-05 22:24:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1643. [2021-06-05 22:24:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 3.3300852618757615) internal successors, (5468), 1642 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5468 transitions. [2021-06-05 22:24:29,738 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5468 transitions. Word has length 25 [2021-06-05 22:24:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:29,738 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 5468 transitions. [2021-06-05 22:24:29,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5468 transitions. [2021-06-05 22:24:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:29,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:29,740 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:29,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18796 [2021-06-05 22:24:29,941 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash -477910949, now seen corresponding path program 285 times [2021-06-05 22:24:29,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:29,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140371158] [2021-06-05 22:24:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:30,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140371158] [2021-06-05 22:24:30,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140371158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157856188] [2021-06-05 22:24:30,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:30,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:24:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:30,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:30,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157856188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:30,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:30,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:30,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941848727] [2021-06-05 22:24:30,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:30,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:30,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:30,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:30,399 INFO L87 Difference]: Start difference. First operand 1643 states and 5468 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:35,125 INFO L93 Difference]: Finished difference Result 3164 states and 9776 transitions. [2021-06-05 22:24:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 22:24:35,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:35,129 INFO L225 Difference]: With dead ends: 3164 [2021-06-05 22:24:35,130 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 22:24:35,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4978 ImplicationChecksByTransitivity, 3728.9ms TimeCoverageRelationStatistics Valid=1006, Invalid=12566, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 22:24:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 22:24:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 1695. [2021-06-05 22:24:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.347697756788666) internal successors, (5671), 1694 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5671 transitions. [2021-06-05 22:24:35,155 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5671 transitions. Word has length 25 [2021-06-05 22:24:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:35,155 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5671 transitions. [2021-06-05 22:24:35,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5671 transitions. [2021-06-05 22:24:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:35,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:35,157 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:35,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18801,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:35,357 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:35,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1638417247, now seen corresponding path program 286 times [2021-06-05 22:24:35,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:35,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158010241] [2021-06-05 22:24:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:35,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:35,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158010241] [2021-06-05 22:24:35,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158010241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524024202] [2021-06-05 22:24:35,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:35,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:35,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:35,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:35,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:35,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524024202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:35,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:35,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567732848] [2021-06-05 22:24:35,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:35,825 INFO L87 Difference]: Start difference. First operand 1695 states and 5671 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:39,561 INFO L93 Difference]: Finished difference Result 3214 states and 9853 transitions. [2021-06-05 22:24:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 22:24:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:39,567 INFO L225 Difference]: With dead ends: 3214 [2021-06-05 22:24:39,567 INFO L226 Difference]: Without dead ends: 3087 [2021-06-05 22:24:39,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3637 ImplicationChecksByTransitivity, 3106.1ms TimeCoverageRelationStatistics Valid=809, Invalid=9493, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 22:24:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-06-05 22:24:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 1666. [2021-06-05 22:24:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.3315315315315317) internal successors, (5547), 1665 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5547 transitions. [2021-06-05 22:24:39,600 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5547 transitions. Word has length 25 [2021-06-05 22:24:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:39,600 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5547 transitions. [2021-06-05 22:24:39,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5547 transitions. [2021-06-05 22:24:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:39,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:39,602 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:39,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18808 [2021-06-05 22:24:39,813 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1438193983, now seen corresponding path program 287 times [2021-06-05 22:24:39,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:39,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682673364] [2021-06-05 22:24:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:39,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682673364] [2021-06-05 22:24:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682673364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732505178] [2021-06-05 22:24:39,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:39,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:24:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:39,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:39,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:40,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732505178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:40,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:40,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:40,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759514673] [2021-06-05 22:24:40,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:40,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:40,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:40,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:40,271 INFO L87 Difference]: Start difference. First operand 1666 states and 5547 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:42,721 INFO L93 Difference]: Finished difference Result 2835 states and 8923 transitions. [2021-06-05 22:24:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 22:24:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:42,725 INFO L225 Difference]: With dead ends: 2835 [2021-06-05 22:24:42,725 INFO L226 Difference]: Without dead ends: 2701 [2021-06-05 22:24:42,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 1960.6ms TimeCoverageRelationStatistics Valid=504, Invalid=5502, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:24:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-06-05 22:24:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1691. [2021-06-05 22:24:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.3384615384615386) internal successors, (5642), 1690 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5642 transitions. [2021-06-05 22:24:42,746 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5642 transitions. Word has length 25 [2021-06-05 22:24:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:42,746 INFO L482 AbstractCegarLoop]: Abstraction has 1691 states and 5642 transitions. [2021-06-05 22:24:42,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5642 transitions. [2021-06-05 22:24:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:42,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:42,748 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:42,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18815,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:42,948 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1592451643, now seen corresponding path program 288 times [2021-06-05 22:24:42,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:42,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793170809] [2021-06-05 22:24:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:43,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:43,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793170809] [2021-06-05 22:24:43,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793170809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:43,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209494743] [2021-06-05 22:24:43,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:43,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:24:43,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:43,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209494743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:43,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:43,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:43,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636557519] [2021-06-05 22:24:43,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:43,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:43,372 INFO L87 Difference]: Start difference. First operand 1691 states and 5642 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:46,260 INFO L93 Difference]: Finished difference Result 3002 states and 9403 transitions. [2021-06-05 22:24:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 22:24:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:46,263 INFO L225 Difference]: With dead ends: 3002 [2021-06-05 22:24:46,263 INFO L226 Difference]: Without dead ends: 2893 [2021-06-05 22:24:46,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 2394.2ms TimeCoverageRelationStatistics Valid=775, Invalid=7967, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 22:24:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-05 22:24:46,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1723. [2021-06-05 22:24:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.3577235772357725) internal successors, (5782), 1722 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5782 transitions. [2021-06-05 22:24:46,288 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5782 transitions. Word has length 25 [2021-06-05 22:24:46,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:46,288 INFO L482 AbstractCegarLoop]: Abstraction has 1723 states and 5782 transitions. [2021-06-05 22:24:46,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5782 transitions. [2021-06-05 22:24:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:46,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:46,290 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:46,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18820 [2021-06-05 22:24:46,491 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:46,491 INFO L82 PathProgramCache]: Analyzing trace with hash 156580283, now seen corresponding path program 289 times [2021-06-05 22:24:46,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:46,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102322284] [2021-06-05 22:24:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:46,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102322284] [2021-06-05 22:24:46,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102322284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041726746] [2021-06-05 22:24:46,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:46,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041726746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:46,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:46,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:24:46,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095127008] [2021-06-05 22:24:46,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:24:46,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:24:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:24:46,946 INFO L87 Difference]: Start difference. First operand 1723 states and 5782 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:50,368 INFO L93 Difference]: Finished difference Result 2877 states and 8994 transitions. [2021-06-05 22:24:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 22:24:50,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:50,372 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 22:24:50,372 INFO L226 Difference]: Without dead ends: 2797 [2021-06-05 22:24:50,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 2714.9ms TimeCoverageRelationStatistics Valid=1027, Invalid=10315, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 22:24:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-05 22:24:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1745. [2021-06-05 22:24:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.3583715596330275) internal successors, (5857), 1744 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5857 transitions. [2021-06-05 22:24:50,397 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5857 transitions. Word has length 25 [2021-06-05 22:24:50,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:50,398 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 5857 transitions. [2021-06-05 22:24:50,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5857 transitions. [2021-06-05 22:24:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:50,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:50,400 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:50,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18827,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:50,613 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:50,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:50,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1053185537, now seen corresponding path program 290 times [2021-06-05 22:24:50,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:50,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593778340] [2021-06-05 22:24:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:50,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:50,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593778340] [2021-06-05 22:24:50,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593778340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:50,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904552012] [2021-06-05 22:24:50,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:50,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:50,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:50,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:51,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904552012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:51,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:51,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 22:24:51,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082976317] [2021-06-05 22:24:51,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:24:51,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:51,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:24:51,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:51,043 INFO L87 Difference]: Start difference. First operand 1745 states and 5857 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:52,893 INFO L93 Difference]: Finished difference Result 2415 states and 7787 transitions. [2021-06-05 22:24:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:24:52,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:52,896 INFO L225 Difference]: With dead ends: 2415 [2021-06-05 22:24:52,896 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 22:24:52,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1257.6ms TimeCoverageRelationStatistics Valid=324, Invalid=3582, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:24:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 22:24:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1775. [2021-06-05 22:24:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 3.3641488162344984) internal successors, (5968), 1774 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 5968 transitions. [2021-06-05 22:24:52,917 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 5968 transitions. Word has length 25 [2021-06-05 22:24:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:52,917 INFO L482 AbstractCegarLoop]: Abstraction has 1775 states and 5968 transitions. [2021-06-05 22:24:52,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 5968 transitions. [2021-06-05 22:24:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:52,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:52,919 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:53,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18834,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:53,120 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:53,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1215983649, now seen corresponding path program 291 times [2021-06-05 22:24:53,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:53,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921744189] [2021-06-05 22:24:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:53,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:53,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921744189] [2021-06-05 22:24:53,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921744189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:53,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952453849] [2021-06-05 22:24:53,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:53,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:24:53,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:53,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:53,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952453849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:53,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:53,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-05 22:24:53,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728366264] [2021-06-05 22:24:53,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:53,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:53,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:53,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:53,497 INFO L87 Difference]: Start difference. First operand 1775 states and 5968 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:54,310 INFO L93 Difference]: Finished difference Result 2268 states and 7412 transitions. [2021-06-05 22:24:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:24:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:54,313 INFO L225 Difference]: With dead ends: 2268 [2021-06-05 22:24:54,313 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 22:24:54,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 810.4ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:24:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 22:24:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1719. [2021-06-05 22:24:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3661233993015136) internal successors, (5783), 1718 states have internal predecessors, (5783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5783 transitions. [2021-06-05 22:24:54,331 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5783 transitions. Word has length 25 [2021-06-05 22:24:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:54,331 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5783 transitions. [2021-06-05 22:24:54,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5783 transitions. [2021-06-05 22:24:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:54,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:54,333 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:54,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18838 [2021-06-05 22:24:54,533 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:54,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1049365141, now seen corresponding path program 292 times [2021-06-05 22:24:54,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:54,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116894947] [2021-06-05 22:24:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:24:54,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:54,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116894947] [2021-06-05 22:24:54,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116894947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:54,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849419288] [2021-06-05 22:24:54,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:54,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:54,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:55,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:24:55,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:24:55,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:24:55,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:24:55,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:55,177 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,478 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-06-05 22:24:55,478 INFO L628 ElimStorePlain]: treesize reduction 348, result has 51.5 percent of original size [2021-06-05 22:24:55,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,482 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,487 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,490 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,617 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 22:24:55,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:55,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,622 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,630 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,752 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 22:24:55,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,756 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,760 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:24:55,764 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,880 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 22:24:55,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:55,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 12 xjuncts. [2021-06-05 22:24:55,885 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:849, output treesize:325 [2021-06-05 22:24:56,043 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 66 [2021-06-05 22:24:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:56,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849419288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:56,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:56,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:24:56,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960916844] [2021-06-05 22:24:56,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:24:56,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:24:56,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:24:56,192 INFO L87 Difference]: Start difference. First operand 1719 states and 5783 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:57,218 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-06-05 22:24:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:57,585 INFO L93 Difference]: Finished difference Result 1955 states and 6452 transitions. [2021-06-05 22:24:57,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:24:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:57,588 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 22:24:57,588 INFO L226 Difference]: Without dead ends: 1904 [2021-06-05 22:24:57,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1398.5ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:24:57,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-06-05 22:24:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1728. [2021-06-05 22:24:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.364215402431963) internal successors, (5810), 1727 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5810 transitions. [2021-06-05 22:24:57,606 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5810 transitions. Word has length 25 [2021-06-05 22:24:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:57,606 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 5810 transitions. [2021-06-05 22:24:57,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5810 transitions. [2021-06-05 22:24:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:57,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:57,608 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:57,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18842 [2021-06-05 22:24:57,808 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:57,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1257710733, now seen corresponding path program 293 times [2021-06-05 22:24:57,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:57,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991845739] [2021-06-05 22:24:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:24:57,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:57,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991845739] [2021-06-05 22:24:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991845739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:57,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941723841] [2021-06-05 22:24:57,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:57,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:24:57,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:57,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:57,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:58,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941723841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:58,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:58,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 22:24:58,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623455477] [2021-06-05 22:24:58,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:58,109 INFO L87 Difference]: Start difference. First operand 1728 states and 5810 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:58,862 INFO L93 Difference]: Finished difference Result 2137 states and 7072 transitions. [2021-06-05 22:24:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:24:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:58,865 INFO L225 Difference]: With dead ends: 2137 [2021-06-05 22:24:58,865 INFO L226 Difference]: Without dead ends: 2020 [2021-06-05 22:24:58,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:24:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-06-05 22:24:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1729. [2021-06-05 22:24:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 3.369212962962963) internal successors, (5822), 1728 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 5822 transitions. [2021-06-05 22:24:58,882 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 5822 transitions. Word has length 25 [2021-06-05 22:24:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:58,882 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 5822 transitions. [2021-06-05 22:24:58,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 5822 transitions. [2021-06-05 22:24:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:58,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:58,884 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:59,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18899,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:59,084 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1618899295, now seen corresponding path program 294 times [2021-06-05 22:24:59,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:59,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192071440] [2021-06-05 22:24:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:59,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:59,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192071440] [2021-06-05 22:24:59,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192071440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:59,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891005553] [2021-06-05 22:24:59,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:59,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:24:59,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:24:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:59,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891005553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:59,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:59,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:24:59,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96209646] [2021-06-05 22:24:59,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:59,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:59,413 INFO L87 Difference]: Start difference. First operand 1729 states and 5822 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:59,672 INFO L93 Difference]: Finished difference Result 1838 states and 6131 transitions. [2021-06-05 22:24:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:24:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:24:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:59,675 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 22:24:59,675 INFO L226 Difference]: Without dead ends: 1808 [2021-06-05 22:24:59,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:24:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-06-05 22:24:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1735. [2021-06-05 22:24:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 3.3679354094579006) internal successors, (5840), 1734 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 5840 transitions. [2021-06-05 22:24:59,692 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 5840 transitions. Word has length 25 [2021-06-05 22:24:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:59,692 INFO L482 AbstractCegarLoop]: Abstraction has 1735 states and 5840 transitions. [2021-06-05 22:24:59,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 5840 transitions. [2021-06-05 22:24:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:24:59,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:59,694 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:59,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18902,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:59,894 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1827244887, now seen corresponding path program 295 times [2021-06-05 22:24:59,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:59,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909797502] [2021-06-05 22:24:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:25:00,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:00,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909797502] [2021-06-05 22:25:00,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909797502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:00,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788282879] [2021-06-05 22:25:00,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:00,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:00,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788282879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:00,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:00,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 22:25:00,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914141751] [2021-06-05 22:25:00,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:00,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:00,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:00,233 INFO L87 Difference]: Start difference. First operand 1735 states and 5840 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:00,816 INFO L93 Difference]: Finished difference Result 1990 states and 6614 transitions. [2021-06-05 22:25:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:25:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:00,818 INFO L225 Difference]: With dead ends: 1990 [2021-06-05 22:25:00,818 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 22:25:00,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 526.4ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:25:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 22:25:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1732. [2021-06-05 22:25:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 3.368573079145003) internal successors, (5831), 1731 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 5831 transitions. [2021-06-05 22:25:00,836 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 5831 transitions. Word has length 25 [2021-06-05 22:25:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:00,836 INFO L482 AbstractCegarLoop]: Abstraction has 1732 states and 5831 transitions. [2021-06-05 22:25:00,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 5831 transitions. [2021-06-05 22:25:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:00,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:00,838 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:01,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18905,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:01,038 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:01,038 INFO L82 PathProgramCache]: Analyzing trace with hash -637559433, now seen corresponding path program 296 times [2021-06-05 22:25:01,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:01,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037257352] [2021-06-05 22:25:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:25:01,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:01,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037257352] [2021-06-05 22:25:01,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037257352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:01,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567495597] [2021-06-05 22:25:01,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:01,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:01,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:01,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567495597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:01,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:01,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 22:25:01,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357238370] [2021-06-05 22:25:01,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:01,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:01,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:01,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:01,355 INFO L87 Difference]: Start difference. First operand 1732 states and 5831 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:01,945 INFO L93 Difference]: Finished difference Result 2345 states and 7728 transitions. [2021-06-05 22:25:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:25:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:01,949 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 22:25:01,949 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 22:25:01,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 448.2ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:25:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 22:25:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1744. [2021-06-05 22:25:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 3.374641422834194) internal successors, (5882), 1743 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5882 transitions. [2021-06-05 22:25:01,967 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5882 transitions. Word has length 25 [2021-06-05 22:25:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:01,967 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 5882 transitions. [2021-06-05 22:25:01,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5882 transitions. [2021-06-05 22:25:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:01,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:01,969 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:02,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18908 [2021-06-05 22:25:02,170 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash 940159213, now seen corresponding path program 297 times [2021-06-05 22:25:02,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:02,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694487159] [2021-06-05 22:25:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:25:02,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:02,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694487159] [2021-06-05 22:25:02,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694487159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:02,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386541153] [2021-06-05 22:25:02,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:02,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:25:02,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:02,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:02,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:02,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386541153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:02,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:02,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 22:25:02,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498921641] [2021-06-05 22:25:02,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:02,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:02,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:02,522 INFO L87 Difference]: Start difference. First operand 1744 states and 5882 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:03,242 INFO L93 Difference]: Finished difference Result 2472 states and 8098 transitions. [2021-06-05 22:25:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:25:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:03,246 INFO L225 Difference]: With dead ends: 2472 [2021-06-05 22:25:03,246 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 22:25:03,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 643.3ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:25:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 22:25:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1841. [2021-06-05 22:25:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.383695652173913) internal successors, (6226), 1840 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6226 transitions. [2021-06-05 22:25:03,266 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6226 transitions. Word has length 25 [2021-06-05 22:25:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:03,266 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6226 transitions. [2021-06-05 22:25:03,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6226 transitions. [2021-06-05 22:25:03,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:03,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:03,268 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:03,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18911,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:03,468 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:03,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1298407891, now seen corresponding path program 298 times [2021-06-05 22:25:03,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:03,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451675491] [2021-06-05 22:25:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:03,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:03,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451675491] [2021-06-05 22:25:03,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451675491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:03,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482976062] [2021-06-05 22:25:03,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:03,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:03,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:03,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:03,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482976062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:03,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:03,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:25:03,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114838175] [2021-06-05 22:25:03,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:03,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:03,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:03,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:03,818 INFO L87 Difference]: Start difference. First operand 1841 states and 6226 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:04,134 INFO L93 Difference]: Finished difference Result 1947 states and 6517 transitions. [2021-06-05 22:25:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:25:04,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:04,137 INFO L225 Difference]: With dead ends: 1947 [2021-06-05 22:25:04,137 INFO L226 Difference]: Without dead ends: 1917 [2021-06-05 22:25:04,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:25:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-06-05 22:25:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1844. [2021-06-05 22:25:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3830710797612586) internal successors, (6235), 1843 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6235 transitions. [2021-06-05 22:25:04,155 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6235 transitions. Word has length 25 [2021-06-05 22:25:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:04,156 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 6235 transitions. [2021-06-05 22:25:04,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:04,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6235 transitions. [2021-06-05 22:25:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:04,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:04,158 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:04,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18915 [2021-06-05 22:25:04,358 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:04,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1895161011, now seen corresponding path program 299 times [2021-06-05 22:25:04,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:04,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581746965] [2021-06-05 22:25:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:04,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:04,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581746965] [2021-06-05 22:25:04,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581746965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:04,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028887573] [2021-06-05 22:25:04,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:04,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:25:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:04,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028887573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:04,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:04,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:25:04,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509588075] [2021-06-05 22:25:04,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:04,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:04,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:04,773 INFO L87 Difference]: Start difference. First operand 1844 states and 6235 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:05,082 INFO L93 Difference]: Finished difference Result 1948 states and 6528 transitions. [2021-06-05 22:25:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:25:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:05,084 INFO L225 Difference]: With dead ends: 1948 [2021-06-05 22:25:05,085 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 22:25:05,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:25:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 22:25:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1847. [2021-06-05 22:25:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.382448537378115) internal successors, (6244), 1846 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 6244 transitions. [2021-06-05 22:25:05,103 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 6244 transitions. Word has length 25 [2021-06-05 22:25:05,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:05,103 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 6244 transitions. [2021-06-05 22:25:05,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:05,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 6244 transitions. [2021-06-05 22:25:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:05,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:05,105 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:05,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18919 [2021-06-05 22:25:05,305 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:05,306 INFO L82 PathProgramCache]: Analyzing trace with hash 743959125, now seen corresponding path program 300 times [2021-06-05 22:25:05,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:05,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640321887] [2021-06-05 22:25:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:05,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:05,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640321887] [2021-06-05 22:25:05,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640321887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:05,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669770726] [2021-06-05 22:25:05,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:05,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:25:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:05,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:05,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669770726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:05,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:05,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:25:05,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059138110] [2021-06-05 22:25:05,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:05,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:05,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:05,712 INFO L87 Difference]: Start difference. First operand 1847 states and 6244 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:06,388 INFO L93 Difference]: Finished difference Result 2037 states and 6786 transitions. [2021-06-05 22:25:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:25:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:06,391 INFO L225 Difference]: With dead ends: 2037 [2021-06-05 22:25:06,391 INFO L226 Difference]: Without dead ends: 2027 [2021-06-05 22:25:06,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 597.9ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:25:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-05 22:25:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1859. [2021-06-05 22:25:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 3.3858988159311085) internal successors, (6291), 1858 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6291 transitions. [2021-06-05 22:25:06,411 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6291 transitions. Word has length 25 [2021-06-05 22:25:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:06,411 INFO L482 AbstractCegarLoop]: Abstraction has 1859 states and 6291 transitions. [2021-06-05 22:25:06,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:06,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6291 transitions. [2021-06-05 22:25:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:06,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:06,413 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:06,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18923,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:06,629 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1138414573, now seen corresponding path program 301 times [2021-06-05 22:25:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:06,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444488063] [2021-06-05 22:25:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:06,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:06,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444488063] [2021-06-05 22:25:06,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444488063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:06,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946404246] [2021-06-05 22:25:06,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:07,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946404246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:07,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:07,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:25:07,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477019086] [2021-06-05 22:25:07,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:07,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:07,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:07,015 INFO L87 Difference]: Start difference. First operand 1859 states and 6291 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:07,366 INFO L93 Difference]: Finished difference Result 1977 states and 6637 transitions. [2021-06-05 22:25:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:25:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:07,369 INFO L225 Difference]: With dead ends: 1977 [2021-06-05 22:25:07,369 INFO L226 Difference]: Without dead ends: 1977 [2021-06-05 22:25:07,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:25:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-06-05 22:25:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1841. [2021-06-05 22:25:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.383695652173913) internal successors, (6226), 1840 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6226 transitions. [2021-06-05 22:25:07,390 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6226 transitions. Word has length 25 [2021-06-05 22:25:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:07,390 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6226 transitions. [2021-06-05 22:25:07,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6226 transitions. [2021-06-05 22:25:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:07,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:07,392 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:07,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18929 [2021-06-05 22:25:07,597 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -909188487, now seen corresponding path program 302 times [2021-06-05 22:25:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:07,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379922261] [2021-06-05 22:25:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:25:07,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:07,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379922261] [2021-06-05 22:25:07,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379922261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:07,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526074504] [2021-06-05 22:25:07,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:07,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:07,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:07,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:07,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526074504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:07,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:07,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 22:25:07,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742200561] [2021-06-05 22:25:07,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:07,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:07,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:07,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:07,985 INFO L87 Difference]: Start difference. First operand 1841 states and 6226 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:09,013 INFO L93 Difference]: Finished difference Result 2152 states and 7150 transitions. [2021-06-05 22:25:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:25:09,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:09,016 INFO L225 Difference]: With dead ends: 2152 [2021-06-05 22:25:09,016 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 22:25:09,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 870.5ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:25:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 22:25:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1838. [2021-06-05 22:25:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 3.3843222645617854) internal successors, (6217), 1837 states have internal predecessors, (6217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 6217 transitions. [2021-06-05 22:25:09,036 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 6217 transitions. Word has length 25 [2021-06-05 22:25:09,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:09,036 INFO L482 AbstractCegarLoop]: Abstraction has 1838 states and 6217 transitions. [2021-06-05 22:25:09,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:09,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 6217 transitions. [2021-06-05 22:25:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:09,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:09,042 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:09,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18935,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:09,242 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1161174105, now seen corresponding path program 303 times [2021-06-05 22:25:09,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:09,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957467773] [2021-06-05 22:25:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:25:09,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:09,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957467773] [2021-06-05 22:25:09,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957467773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:09,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007744160] [2021-06-05 22:25:09,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:09,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:25:09,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:09,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:25:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:09,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:09,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:09,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:09,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:09,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 22:25:09,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:25:09,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:09,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:25:09,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:09,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:25:09,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:09,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:25:09,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:09,678 INFO L628 ElimStorePlain]: treesize reduction 44, result has 60.4 percent of original size [2021-06-05 22:25:09,678 INFO L518 ElimStorePlain]: Eliminatee index_of_4 vanished before elimination [2021-06-05 22:25:09,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:25:09,679 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:163, output treesize:67 [2021-06-05 22:25:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:09,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007744160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:09,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:09,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 22:25:09,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155782396] [2021-06-05 22:25:09,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:25:09,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:09,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:25:09,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:25:09,792 INFO L87 Difference]: Start difference. First operand 1838 states and 6217 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:10,464 INFO L93 Difference]: Finished difference Result 2363 states and 7759 transitions. [2021-06-05 22:25:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:25:10,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:10,467 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 22:25:10,467 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 22:25:10,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:25:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 22:25:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1680. [2021-06-05 22:25:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.3609291244788566) internal successors, (5643), 1679 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5643 transitions. [2021-06-05 22:25:10,485 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5643 transitions. Word has length 25 [2021-06-05 22:25:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:10,485 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5643 transitions. [2021-06-05 22:25:10,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:10,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5643 transitions. [2021-06-05 22:25:10,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:10,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:10,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:10,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18939 [2021-06-05 22:25:10,687 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:10,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:10,687 INFO L82 PathProgramCache]: Analyzing trace with hash -338190893, now seen corresponding path program 304 times [2021-06-05 22:25:10,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:10,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954372383] [2021-06-05 22:25:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:25:10,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:10,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954372383] [2021-06-05 22:25:10,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954372383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:10,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829649659] [2021-06-05 22:25:10,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:10,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:10,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:10,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:11,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:11,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:11,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:11,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:11,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:11,379 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:11,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:11,390 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:11,395 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:11,400 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:11,407 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:11,413 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:11,418 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:11,422 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:11,428 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:11,433 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:11,437 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:11,442 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:11,447 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:11,451 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:11,456 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:11,460 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:11,465 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:11,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:11,470 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:11,474 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:11,631 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 22:25:11,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:11,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 24 dim-0 vars, and 12 xjuncts. [2021-06-05 22:25:11,639 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 6 variables, input treesize:1041, output treesize:421 [2021-06-05 22:25:11,874 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 119 [2021-06-05 22:25:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:12,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829649659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:12,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:12,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 17 [2021-06-05 22:25:12,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948971462] [2021-06-05 22:25:12,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:12,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:12,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:12,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:12,130 INFO L87 Difference]: Start difference. First operand 1680 states and 5643 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:12,657 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 125 [2021-06-05 22:25:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:12,837 INFO L93 Difference]: Finished difference Result 1847 states and 6139 transitions. [2021-06-05 22:25:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:25:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:12,840 INFO L225 Difference]: With dead ends: 1847 [2021-06-05 22:25:12,840 INFO L226 Difference]: Without dead ends: 1817 [2021-06-05 22:25:12,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 824.0ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:25:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-06-05 22:25:12,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1687. [2021-06-05 22:25:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.360023724792408) internal successors, (5665), 1686 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5665 transitions. [2021-06-05 22:25:12,857 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5665 transitions. Word has length 25 [2021-06-05 22:25:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:12,857 INFO L482 AbstractCegarLoop]: Abstraction has 1687 states and 5665 transitions. [2021-06-05 22:25:12,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5665 transitions. [2021-06-05 22:25:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:12,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:12,859 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:13,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18951 [2021-06-05 22:25:13,059 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:13,060 INFO L82 PathProgramCache]: Analyzing trace with hash 763207501, now seen corresponding path program 305 times [2021-06-05 22:25:13,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:13,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704499095] [2021-06-05 22:25:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:25:13,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:13,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704499095] [2021-06-05 22:25:13,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704499095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:13,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009914704] [2021-06-05 22:25:13,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:13,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:25:13,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:13,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:25:13,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:13,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:13,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:13,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:13,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:13,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:13,338 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:13,341 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:25:13,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:13,347 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:25:13,350 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:13,353 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:13,355 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:13,357 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,421 INFO L628 ElimStorePlain]: treesize reduction 26, result has 76.1 percent of original size [2021-06-05 22:25:13,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:13,424 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:13,426 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:13,429 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:13,431 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:13,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:13,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:13,443 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 3 variables, input treesize:341, output treesize:16 [2021-06-05 22:25:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:25:13,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009914704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:13,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:13,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:25:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666436651] [2021-06-05 22:25:13,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:25:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:13,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:25:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:25:13,504 INFO L87 Difference]: Start difference. First operand 1687 states and 5665 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:13,724 INFO L93 Difference]: Finished difference Result 2096 states and 6893 transitions. [2021-06-05 22:25:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:25:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:13,727 INFO L225 Difference]: With dead ends: 2096 [2021-06-05 22:25:13,727 INFO L226 Difference]: Without dead ends: 2019 [2021-06-05 22:25:13,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-06-05 22:25:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1663. [2021-06-05 22:25:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.3537906137184117) internal successors, (5574), 1662 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5574 transitions. [2021-06-05 22:25:13,752 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5574 transitions. Word has length 25 [2021-06-05 22:25:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:13,752 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5574 transitions. [2021-06-05 22:25:13,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5574 transitions. [2021-06-05 22:25:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:13,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:13,754 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:13,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19086 [2021-06-05 22:25:13,955 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:13,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1731620867, now seen corresponding path program 306 times [2021-06-05 22:25:13,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:13,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160473815] [2021-06-05 22:25:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:14,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:14,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160473815] [2021-06-05 22:25:14,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160473815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:14,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216874015] [2021-06-05 22:25:14,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:14,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:25:14,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:14,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:14,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:14,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:14,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:14,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:14,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:14,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:14,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:14,400 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:14,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:14,416 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:14,448 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,456 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:25:14,460 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,464 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,468 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,471 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,475 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,478 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:14,483 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,486 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,489 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:14,494 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,497 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,500 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,503 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:14,507 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,666 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-06-05 22:25:14,667 INFO L628 ElimStorePlain]: treesize reduction 33, result has 87.6 percent of original size [2021-06-05 22:25:14,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 9 xjuncts. [2021-06-05 22:25:14,670 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:981, output treesize:226 [2021-06-05 22:25:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:15,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216874015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:15,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:15,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 22:25:15,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746601996] [2021-06-05 22:25:15,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:15,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:15,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:15,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:15,073 INFO L87 Difference]: Start difference. First operand 1663 states and 5574 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:15,513 INFO L93 Difference]: Finished difference Result 1781 states and 5906 transitions. [2021-06-05 22:25:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:25:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:15,515 INFO L225 Difference]: With dead ends: 1781 [2021-06-05 22:25:15,515 INFO L226 Difference]: Without dead ends: 1751 [2021-06-05 22:25:15,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:25:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-06-05 22:25:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1671. [2021-06-05 22:25:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3508982035928145) internal successors, (5596), 1670 states have internal predecessors, (5596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5596 transitions. [2021-06-05 22:25:15,532 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5596 transitions. Word has length 25 [2021-06-05 22:25:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:15,532 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5596 transitions. [2021-06-05 22:25:15,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5596 transitions. [2021-06-05 22:25:15,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:15,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:15,534 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:15,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19105,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:15,735 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:15,735 INFO L82 PathProgramCache]: Analyzing trace with hash 852501469, now seen corresponding path program 307 times [2021-06-05 22:25:15,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:15,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999493106] [2021-06-05 22:25:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:25:15,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:15,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999493106] [2021-06-05 22:25:15,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999493106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:15,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085641672] [2021-06-05 22:25:15,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:15,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:16,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:16,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:16,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:16,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:16,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:16,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:16,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:16,193 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,197 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:16,202 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,206 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:16,210 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,214 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,217 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,221 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:16,225 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,228 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:16,232 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,236 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,240 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:25:16,243 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,247 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:16,251 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,255 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,258 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,261 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,437 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-06-05 22:25:16,438 INFO L628 ElimStorePlain]: treesize reduction 33, result has 87.6 percent of original size [2021-06-05 22:25:16,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 9 xjuncts. [2021-06-05 22:25:16,442 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:981, output treesize:226 [2021-06-05 22:25:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085641672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:16,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:16,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 22:25:16,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232540640] [2021-06-05 22:25:16,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:16,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:16,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:16,775 INFO L87 Difference]: Start difference. First operand 1671 states and 5596 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:17,243 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2021-06-05 22:25:17,410 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2021-06-05 22:25:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:17,582 INFO L93 Difference]: Finished difference Result 1964 states and 6418 transitions. [2021-06-05 22:25:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:25:17,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:25:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:17,585 INFO L225 Difference]: With dead ends: 1964 [2021-06-05 22:25:17,585 INFO L226 Difference]: Without dead ends: 1885 [2021-06-05 22:25:17,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 790.1ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:25:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-06-05 22:25:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1683. [2021-06-05 22:25:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.347205707491082) internal successors, (5630), 1682 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5630 transitions. [2021-06-05 22:25:17,603 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5630 transitions. Word has length 25 [2021-06-05 22:25:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:17,603 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5630 transitions. [2021-06-05 22:25:17,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5630 transitions. [2021-06-05 22:25:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:25:17,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:17,605 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:17,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19189 [2021-06-05 22:25:17,805 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:17,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1373372189, now seen corresponding path program 308 times [2021-06-05 22:25:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:17,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016462812] [2021-06-05 22:25:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:17,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:17,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016462812] [2021-06-05 22:25:17,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016462812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:17,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604564490] [2021-06-05 22:25:17,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:17,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:17,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:17,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:25:17,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:18,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:18,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:18,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:18,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:18,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:18,242 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:18,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:18,252 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:18,255 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:18,259 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:18,264 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:25:18,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:18,273 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:25:18,278 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:18,282 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 22:25:18,287 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:18,291 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:25:18,295 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:18,298 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:18,302 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:25:18,306 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:18,310 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:18,313 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:18,317 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:18,320 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:18,324 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-06-05 22:25:18,359 WARN L222 SmtUtils]: Removed 16 from assertion stack [2021-06-05 22:25:18,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19266,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:18,560 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:25:18,561 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:25:18,567 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:25:18,567 INFO L202 PluginConnector]: Adding new model poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:25:18 BasicIcfg [2021-06-05 22:25:18,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:25:18,567 INFO L168 Benchmark]: Toolchain (without parser) took 813550.84 ms. Allocated memory was 356.5 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 334.4 MB in the beginning and 800.6 MB in the end (delta: -466.1 MB). Peak memory consumption was 719.5 MB. Max. memory is 16.0 GB. [2021-06-05 22:25:18,568 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 356.5 MB. Free memory is still 336.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:25:18,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.50 ms. Allocated memory is still 356.5 MB. Free memory was 334.3 MB in the beginning and 332.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:25:18,568 INFO L168 Benchmark]: Boogie Preprocessor took 43.75 ms. Allocated memory is still 356.5 MB. Free memory was 332.6 MB in the beginning and 330.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:25:18,568 INFO L168 Benchmark]: RCFGBuilder took 720.85 ms. Allocated memory is still 356.5 MB. Free memory was 330.6 MB in the beginning and 284.6 MB in the end (delta: 46.0 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.0 GB. [2021-06-05 22:25:18,568 INFO L168 Benchmark]: TraceAbstraction took 812736.39 ms. Allocated memory was 356.5 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 284.6 MB in the beginning and 800.6 MB in the end (delta: -516.0 MB). Peak memory consumption was 667.9 MB. Max. memory is 16.0 GB. [2021-06-05 22:25:18,568 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 356.5 MB. Free memory is still 336.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 39.50 ms. Allocated memory is still 356.5 MB. Free memory was 334.3 MB in the beginning and 332.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 43.75 ms. Allocated memory is still 356.5 MB. Free memory was 332.6 MB in the beginning and 330.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 720.85 ms. Allocated memory is still 356.5 MB. Free memory was 330.6 MB in the beginning and 284.6 MB in the end (delta: 46.0 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 812736.39 ms. Allocated memory was 356.5 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 284.6 MB in the beginning and 800.6 MB in the end (delta: -516.0 MB). Peak memory consumption was 667.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 299]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 35 for 34ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 44 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 812642.3ms, OverallIterations: 406, TraceHistogramMax: 3, EmptinessCheckTime: 383.2ms, AutomataDifference: 416204.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32632 SDtfs, 49143 SDslu, 267294 SDs, 0 SdLazy, 270481 SolverSat, 12686 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104669.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22068 GetRequests, 9258 SyntacticMatches, 372 SemanticMatches, 12438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179523 ImplicationChecksByTransitivity, 365027.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1859occurred in iteration=398, InterpolantAutomatonStates: 9868, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3887.8ms AutomataMinimizationTime, 405 MinimizatonAttempts, 120457 StatesRemovedByMinimization, 394 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2104.2ms SsaConstructionTime, 5184.1ms SatisfiabilityAnalysisTime, 309014.9ms InterpolantComputationTime, 16576 NumberOfCodeBlocks, 16550 NumberOfCodeBlocksAsserted, 1170 NumberOfCheckSat, 15837 ConstructedInterpolants, 279 QuantifiedInterpolants, 221784 SizeOfPredicates, 2367 NumberOfNonLiveVariables, 34261 ConjunctsInSsa, 5891 ConjunctsInUnsatCore, 739 InterpolantComputations, 78 PerfectInterpolantSequences, 1712/6741 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown