/usr/bin/java -Xmx8000000000 -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/popl20-more/max-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:32:01,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:32:01,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:32:01,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:32:01,505 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 [2021-07-09 18:32:01,542 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:32:01,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:32:01,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:32:01,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:32:01,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:32:01,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:32:01,547 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:32:01,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:32:01,547 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:32:01,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:32:01,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:32:01,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:32:01,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:32:01,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:32:01,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:32:01,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:32:01,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:32:01,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:32:01,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:32:01,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:32:01,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:32:01,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:32:01,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:32:01,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:32:01,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:32:01,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:32:01,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:32:01,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:32:01,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:32:01,561 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:32:01,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:32:01,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:32:01,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:32:01,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:32:01,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:32:01,884 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:32:01,886 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:32:01,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl [2021-07-09 18:32:01,886 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl' [2021-07-09 18:32:01,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:32:01,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:32:01,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:32:01,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:32:01,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:32:01,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:32:01,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:32:01,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:32:01,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:32:01,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/1) ... [2021-07-09 18:32:01,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:32:01,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:32:01,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:32:01,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:32:01,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (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 [2021-07-09 18:32:02,037 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:32:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:32:02,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:32:02,038 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:32:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:32:02,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:32:02,039 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:32:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:32:02,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:32:02,039 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:32:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:32:02,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:32:02,040 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:32:02,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:32:02,293 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:32:02,295 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:32:02 BoogieIcfgContainer [2021-07-09 18:32:02,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:32:02,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:32:02,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:32:02,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:32:02,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:32:01" (1/2) ... [2021-07-09 18:32:02,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776c94ee and model type max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:32:02, skipping insertion in model container [2021-07-09 18:32:02,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:32:02" (2/2) ... [2021-07-09 18:32:02,302 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun.wvr.bpl [2021-07-09 18:32:02,315 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:32:02,315 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:32:02,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:32:02,316 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:32:02,379 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:32:02,400 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:32:02,416 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:32:02,416 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:32:02,417 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:32:02,417 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:32:02,417 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:32:02,417 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:32:02,417 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:32:02,417 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:32:02,425 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-09 18:32:02,448 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:32:02,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:02,459 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:02,459 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash -234684100, now seen corresponding path program 1 times [2021-07-09 18:32:02,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:02,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731836685] [2021-07-09 18:32:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:02,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:02,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731836685] [2021-07-09 18:32:02,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731836685] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:32:02,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:32:02,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:32:02,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942219863] [2021-07-09 18:32:02,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:32:02,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:32:02,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:32:02,740 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-07-09 18:32:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:02,793 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-09 18:32:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:32:02,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2021-07-09 18:32:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:02,810 INFO L225 Difference]: With dead ends: 217 [2021-07-09 18:32:02,811 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 18:32:02,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:32:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 18:32:02,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-09 18:32:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-09 18:32:02,873 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-09 18:32:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:02,874 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-09 18:32:02,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-07-09 18:32:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-09 18:32:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:32:02,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:02,876 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:02,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:32:02,876 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-07-09 18:32:02,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:02,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867461773] [2021-07-09 18:32:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:02,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:02,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867461773] [2021-07-09 18:32:02,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867461773] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:32:02,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:32:02,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:32:02,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799721363] [2021-07-09 18:32:02,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:32:02,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:02,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:32:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:32:02,947 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:03,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:03,001 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-09 18:32:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:32:03,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:32:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:03,006 INFO L225 Difference]: With dead ends: 158 [2021-07-09 18:32:03,006 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 18:32:03,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:32:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 18:32:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-09 18:32:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-09 18:32:03,021 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-09 18:32:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:03,021 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-09 18:32:03,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-09 18:32:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:32:03,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:03,022 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:03,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:32:03,023 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1176026010, now seen corresponding path program 1 times [2021-07-09 18:32:03,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:03,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101495442] [2021-07-09 18:32:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:03,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101495442] [2021-07-09 18:32:03,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101495442] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:32:03,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:32:03,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:32:03,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373472551] [2021-07-09 18:32:03,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:32:03,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:03,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:32:03,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:32:03,067 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:03,103 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-09 18:32:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:32:03,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:32:03,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:03,105 INFO L225 Difference]: With dead ends: 183 [2021-07-09 18:32:03,105 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 18:32:03,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:32:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 18:32:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-09 18:32:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-09 18:32:03,117 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-09 18:32:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:03,118 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-09 18:32:03,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-09 18:32:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:32:03,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:03,119 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:03,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:32:03,120 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:03,124 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-07-09 18:32:03,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:03,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214413443] [2021-07-09 18:32:03,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:03,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214413443] [2021-07-09 18:32:03,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214413443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673100010] [2021-07-09 18:32:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 18:32:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:32:03,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:03,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:03,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,977 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 16 treesize of output 10 [2021-07-09 18:32:03,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 10 [2021-07-09 18:32:03,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:04,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:04,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:04,013 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-07-09 18:32:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:04,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673100010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:04,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:04,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:32:04,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584696761] [2021-07-09 18:32:04,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:32:04,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:04,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:32:04,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:32:04,089 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-09 18:32:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:04,386 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-09 18:32:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:32:04,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-07-09 18:32:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:04,390 INFO L225 Difference]: With dead ends: 330 [2021-07-09 18:32:04,391 INFO L226 Difference]: Without dead ends: 315 [2021-07-09 18:32:04,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:32:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-09 18:32:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-09 18:32:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-09 18:32:04,421 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-09 18:32:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:04,422 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-09 18:32:04,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-09 18:32:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-09 18:32:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:32:04,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:04,431 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:04,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:04,657 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-07-09 18:32:04,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:04,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772457977] [2021-07-09 18:32:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:05,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:05,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772457977] [2021-07-09 18:32:05,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772457977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:05,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943661423] [2021-07-09 18:32:05,030 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 [2021-07-09 18:32:05,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:05,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:05,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:32:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:05,387 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:05,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:32:05,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:05,405 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:05,405 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:32:05,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:05,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:05,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:32:05,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:05,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:05,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:32:05,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:05,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:05,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:32:05,518 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-07-09 18:32:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:05,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943661423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:05,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:05,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 18:32:05,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664785054] [2021-07-09 18:32:05,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:32:05,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:05,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:32:05,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:32:05,657 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-07-09 18:32:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:06,274 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-09 18:32:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:32:06,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 22 [2021-07-09 18:32:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:06,278 INFO L225 Difference]: With dead ends: 374 [2021-07-09 18:32:06,278 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 18:32:06,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 825.6ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:32:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 18:32:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-09 18:32:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-09 18:32:06,293 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-09 18:32:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:06,294 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-09 18:32:06,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-07-09 18:32:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-09 18:32:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:32:06,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:06,299 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:06,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:06,513 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:06,513 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-07-09 18:32:06,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:06,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331525998] [2021-07-09 18:32:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:06,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:06,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331525998] [2021-07-09 18:32:06,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331525998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:06,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813954931] [2021-07-09 18:32:06,745 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 [2021-07-09 18:32:06,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:32:06,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:06,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:32:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:06,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:32:06,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,946 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 16 treesize of output 10 [2021-07-09 18:32:06,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,952 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 16 treesize of output 10 [2021-07-09 18:32:06,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:06,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,962 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 16 treesize of output 10 [2021-07-09 18:32:06,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:06,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,995 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-09 18:32:06,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:06,997 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-07-09 18:32:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:07,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813954931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:07,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:07,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:32:07,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66601943] [2021-07-09 18:32:07,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:32:07,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:32:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:32:07,048 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-07-09 18:32:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:07,241 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-07-09 18:32:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:32:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 [2021-07-09 18:32:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:07,244 INFO L225 Difference]: With dead ends: 296 [2021-07-09 18:32:07,244 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 18:32:07,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:32:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 18:32:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-07-09 18:32:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-09 18:32:07,251 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-09 18:32:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:07,252 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-09 18:32:07,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-07-09 18:32:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-09 18:32:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:32:07,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:07,253 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:07,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:32:07,474 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:07,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-07-09 18:32:07,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:07,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128381747] [2021-07-09 18:32:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:07,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:07,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128381747] [2021-07-09 18:32:07,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128381747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:07,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475505249] [2021-07-09 18:32:07,693 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 [2021-07-09 18:32:07,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:07,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:32:07,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:07,949 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:07,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:32:07,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:07,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:07,960 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:32:07,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:08,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:08,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:08,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:32:08,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:08,053 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:08,053 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:32:08,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:08,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:08,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:32:08,127 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-07-09 18:32:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:08,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475505249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:08,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:08,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:32:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627481146] [2021-07-09 18:32:08,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:08,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:08,290 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 18:32:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:08,726 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-07-09 18:32:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:32:08,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 [2021-07-09 18:32:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:08,729 INFO L225 Difference]: With dead ends: 409 [2021-07-09 18:32:08,729 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 18:32:08,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 574.9ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:32:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 18:32:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-07-09 18:32:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-09 18:32:08,738 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-09 18:32:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:08,738 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-09 18:32:08,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 18:32:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-09 18:32:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:08,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:08,740 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:08,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:08,964 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-07-09 18:32:08,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:08,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313469406] [2021-07-09 18:32:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:09,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313469406] [2021-07-09 18:32:09,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313469406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:09,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196758424] [2021-07-09 18:32:09,037 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 [2021-07-09 18:32:09,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:32:09,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:09,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:09,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196758424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:09,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:09,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:32:09,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559702923] [2021-07-09 18:32:09,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:32:09,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:09,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:32:09,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:32:09,151 INFO L87 Difference]: Start difference. First operand 247 states and 718 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) [2021-07-09 18:32:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:09,545 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-09 18:32:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:32:09,546 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 24 [2021-07-09 18:32:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:09,549 INFO L225 Difference]: With dead ends: 619 [2021-07-09 18:32:09,549 INFO L226 Difference]: Without dead ends: 619 [2021-07-09 18:32:09,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:32:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-09 18:32:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-09 18:32:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-09 18:32:09,561 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-09 18:32:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:09,561 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-09 18:32:09,561 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) [2021-07-09 18:32:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-09 18:32:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:09,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:09,562 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:09,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:32:09,776 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-07-09 18:32:09,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:09,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466041421] [2021-07-09 18:32:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:09,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:09,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466041421] [2021-07-09 18:32:09,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466041421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:09,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801164843] [2021-07-09 18:32:09,820 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 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 [2021-07-09 18:32:09,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:32:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:09,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801164843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:09,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:09,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:09,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755055105] [2021-07-09 18:32:09,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:09,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:09,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:09,948 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:10,729 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-09 18:32:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:32:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-07-09 18:32:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:10,736 INFO L225 Difference]: With dead ends: 1078 [2021-07-09 18:32:10,736 INFO L226 Difference]: Without dead ends: 1078 [2021-07-09 18:32:10,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:32:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-09 18:32:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-09 18:32:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-09 18:32:10,753 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-09 18:32:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:10,753 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-09 18:32:10,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-09 18:32:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:10,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:10,756 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:10,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:10,969 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-07-09 18:32:10,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:10,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190775420] [2021-07-09 18:32:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:11,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:11,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190775420] [2021-07-09 18:32:11,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190775420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:11,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16473920] [2021-07-09 18:32:11,013 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 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 [2021-07-09 18:32:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:11,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:11,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16473920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:11,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:11,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:11,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796863010] [2021-07-09 18:32:11,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:11,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:11,136 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:11,807 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-09 18:32:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:32:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-07-09 18:32:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:11,813 INFO L225 Difference]: With dead ends: 951 [2021-07-09 18:32:11,813 INFO L226 Difference]: Without dead ends: 951 [2021-07-09 18:32:11,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:32:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-09 18:32:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-09 18:32:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-09 18:32:11,837 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-09 18:32:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:11,837 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-09 18:32:11,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-09 18:32:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:11,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:11,838 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:12,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:12,057 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:12,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-07-09 18:32:12,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:12,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087141244] [2021-07-09 18:32:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:12,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:12,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087141244] [2021-07-09 18:32:12,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087141244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:12,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943466788] [2021-07-09 18:32:12,094 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 [2021-07-09 18:32:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:32:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:12,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943466788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:12,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:12,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:32:12,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985012947] [2021-07-09 18:32:12,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:32:12,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:32:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:32:12,189 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-09 18:32:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:12,304 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-09 18:32:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:32:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-09 18:32:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:12,308 INFO L225 Difference]: With dead ends: 669 [2021-07-09 18:32:12,308 INFO L226 Difference]: Without dead ends: 663 [2021-07-09 18:32:12,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-09 18:32:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-09 18:32:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-09 18:32:12,323 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-09 18:32:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:12,323 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-09 18:32:12,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-09 18:32:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-09 18:32:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:12,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:12,325 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:12,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:32:12,541 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-07-09 18:32:12,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:12,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646208723] [2021-07-09 18:32:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:12,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646208723] [2021-07-09 18:32:12,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646208723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653567417] [2021-07-09 18:32:12,583 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 [2021-07-09 18:32:12,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:12,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:12,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:12,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653567417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:12,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:12,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:32:12,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835149129] [2021-07-09 18:32:12,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:12,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:12,692 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 18:32:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:12,910 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-09 18:32:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:32:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-07-09 18:32:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:12,914 INFO L225 Difference]: With dead ends: 710 [2021-07-09 18:32:12,914 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 18:32:12,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:32:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 18:32:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-09 18:32:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 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) [2021-07-09 18:32:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-09 18:32:12,931 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-09 18:32:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:12,931 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-09 18:32:12,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 18:32:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-09 18:32:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:12,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:12,933 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:13,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:13,152 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:13,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-07-09 18:32:13,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:13,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001104557] [2021-07-09 18:32:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:13,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:13,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001104557] [2021-07-09 18:32:13,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001104557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:13,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662078432] [2021-07-09 18:32:13,182 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 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 [2021-07-09 18:32:13,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:13,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:13,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:32:13,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:13,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662078432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:13,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:13,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:32:13,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682143052] [2021-07-09 18:32:13,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:32:13,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:32:13,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:32:13,284 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-09 18:32:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:13,403 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-09 18:32:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:32:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-09 18:32:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:13,408 INFO L225 Difference]: With dead ends: 830 [2021-07-09 18:32:13,408 INFO L226 Difference]: Without dead ends: 830 [2021-07-09 18:32:13,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-09 18:32:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-09 18:32:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 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) [2021-07-09 18:32:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-09 18:32:13,426 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-09 18:32:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:13,426 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-09 18:32:13,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-09 18:32:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-09 18:32:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:13,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:13,428 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:13,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:32:13,633 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-07-09 18:32:13,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:13,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475907658] [2021-07-09 18:32:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:13,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475907658] [2021-07-09 18:32:13,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475907658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741414921] [2021-07-09 18:32:13,679 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 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 [2021-07-09 18:32:13,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:13,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:13,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:13,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:13,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741414921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:13,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:13,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:32:13,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003522429] [2021-07-09 18:32:13,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:32:13,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:32:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:32:13,791 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-09 18:32:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:14,119 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-09 18:32:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:32:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-09 18:32:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:14,126 INFO L225 Difference]: With dead ends: 1196 [2021-07-09 18:32:14,127 INFO L226 Difference]: Without dead ends: 1196 [2021-07-09 18:32:14,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:32:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-09 18:32:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-09 18:32:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-09 18:32:14,155 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-09 18:32:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:14,155 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-09 18:32:14,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-09 18:32:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-09 18:32:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:14,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:14,158 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:14,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:32:14,373 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-07-09 18:32:14,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:14,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595977387] [2021-07-09 18:32:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:14,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:14,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595977387] [2021-07-09 18:32:14,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595977387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:14,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749076896] [2021-07-09 18:32:14,427 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 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 [2021-07-09 18:32:14,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:14,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:14,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:14,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749076896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:14,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:14,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:32:14,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200309107] [2021-07-09 18:32:14,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:32:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:32:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:32:14,577 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-09 18:32:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:15,052 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-09 18:32:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:32:15,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-09 18:32:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:15,060 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 18:32:15,060 INFO L226 Difference]: Without dead ends: 1492 [2021-07-09 18:32:15,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:32:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-09 18:32:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-09 18:32:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-09 18:32:15,092 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-09 18:32:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:15,092 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-09 18:32:15,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-09 18:32:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-09 18:32:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:15,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:15,094 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:15,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:32:15,318 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-07-09 18:32:15,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:15,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865180048] [2021-07-09 18:32:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:15,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:15,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865180048] [2021-07-09 18:32:15,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865180048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:15,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647764070] [2021-07-09 18:32:15,367 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 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 [2021-07-09 18:32:15,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:15,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647764070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:15,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:15,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:32:15,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627381494] [2021-07-09 18:32:15,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:15,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:15,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:15,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:15,487 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 18:32:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:15,734 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-09 18:32:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:32:15,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-07-09 18:32:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:15,741 INFO L225 Difference]: With dead ends: 1258 [2021-07-09 18:32:15,741 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 18:32:15,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:32:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 18:32:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-09 18:32:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-09 18:32:15,766 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-09 18:32:15,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:15,767 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-09 18:32:15,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 18:32:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-09 18:32:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:15,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:15,771 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:15,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-09 18:32:15,995 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-07-09 18:32:15,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:15,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603022301] [2021-07-09 18:32:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:16,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:16,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603022301] [2021-07-09 18:32:16,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603022301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:16,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792419307] [2021-07-09 18:32:16,038 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 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 [2021-07-09 18:32:16,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:32:16,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:16,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:16,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:16,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792419307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:16,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:16,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:32:16,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428972172] [2021-07-09 18:32:16,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:16,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:16,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:16,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:16,161 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-09 18:32:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:16,444 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-09 18:32:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:32:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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 24 [2021-07-09 18:32:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:16,450 INFO L225 Difference]: With dead ends: 1329 [2021-07-09 18:32:16,450 INFO L226 Difference]: Without dead ends: 1329 [2021-07-09 18:32:16,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-09 18:32:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-09 18:32:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-09 18:32:16,477 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-09 18:32:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:16,477 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-09 18:32:16,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-09 18:32:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-09 18:32:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:16,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:16,480 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:16,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:16,705 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-07-09 18:32:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:16,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643723402] [2021-07-09 18:32:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:16,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:16,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643723402] [2021-07-09 18:32:16,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643723402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:16,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979860312] [2021-07-09 18:32:16,748 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 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 [2021-07-09 18:32:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:16,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:16,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979860312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:16,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:16,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:32:16,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349770249] [2021-07-09 18:32:16,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:32:16,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:32:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:32:16,845 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-09 18:32:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:17,234 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-09 18:32:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:32:17,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-07-09 18:32:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:17,241 INFO L225 Difference]: With dead ends: 1548 [2021-07-09 18:32:17,241 INFO L226 Difference]: Without dead ends: 1544 [2021-07-09 18:32:17,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:32:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-09 18:32:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-09 18:32:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-09 18:32:17,269 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-09 18:32:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:17,270 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-09 18:32:17,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-07-09 18:32:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-09 18:32:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:17,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:17,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:17,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:17,490 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:17,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-07-09 18:32:17,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:17,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471062301] [2021-07-09 18:32:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:17,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:17,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471062301] [2021-07-09 18:32:17,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471062301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:17,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458635959] [2021-07-09 18:32:17,528 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 [2021-07-09 18:32:17,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:17,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:17,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:17,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458635959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:17,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:17,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:17,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871620724] [2021-07-09 18:32:17,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:17,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:17,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:17,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:17,646 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:18,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:18,444 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-09 18:32:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:32:18,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-07-09 18:32:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:18,473 INFO L225 Difference]: With dead ends: 2734 [2021-07-09 18:32:18,474 INFO L226 Difference]: Without dead ends: 2734 [2021-07-09 18:32:18,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 444.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:32:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-09 18:32:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-09 18:32:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-09 18:32:18,516 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-09 18:32:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:18,517 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-09 18:32:18,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-09 18:32:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:18,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:18,519 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:18,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:18,742 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:18,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:18,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-07-09 18:32:18,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:18,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018170693] [2021-07-09 18:32:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:18,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:18,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018170693] [2021-07-09 18:32:18,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018170693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:18,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996227040] [2021-07-09 18:32:18,790 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 [2021-07-09 18:32:18,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:18,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:18,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996227040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:18,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:18,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:18,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235422122] [2021-07-09 18:32:18,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:18,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:18,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:18,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:18,940 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:19,745 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-09 18:32:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:32:19,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-07-09 18:32:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:19,753 INFO L225 Difference]: With dead ends: 2693 [2021-07-09 18:32:19,754 INFO L226 Difference]: Without dead ends: 2693 [2021-07-09 18:32:19,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:32:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-09 18:32:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-09 18:32:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-09 18:32:19,796 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-09 18:32:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:19,796 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-09 18:32:19,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-09 18:32:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:19,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:19,799 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:20,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:32:20,021 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-07-09 18:32:20,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:20,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25300908] [2021-07-09 18:32:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:20,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:20,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25300908] [2021-07-09 18:32:20,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25300908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:20,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155048709] [2021-07-09 18:32:20,058 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 [2021-07-09 18:32:20,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:20,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155048709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:20,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:20,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:32:20,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259788172] [2021-07-09 18:32:20,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:32:20,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:20,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:32:20,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:32:20,169 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:20,788 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-09 18:32:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:32:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-09 18:32:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:20,794 INFO L225 Difference]: With dead ends: 2677 [2021-07-09 18:32:20,794 INFO L226 Difference]: Without dead ends: 2677 [2021-07-09 18:32:20,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:32:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-09 18:32:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-09 18:32:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-09 18:32:20,834 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-09 18:32:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:20,835 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-09 18:32:20,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-09 18:32:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:20,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:20,837 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:21,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:32:21,053 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:21,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:21,053 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-07-09 18:32:21,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:21,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545371130] [2021-07-09 18:32:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:21,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:21,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545371130] [2021-07-09 18:32:21,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545371130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:21,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052886200] [2021-07-09 18:32:21,093 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 [2021-07-09 18:32:21,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:32:21,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:21,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:21,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052886200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:21,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:21,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:32:21,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302117995] [2021-07-09 18:32:21,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:32:21,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:32:21,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:32:21,195 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:21,793 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-09 18:32:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:32:21,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-09 18:32:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:21,801 INFO L225 Difference]: With dead ends: 2474 [2021-07-09 18:32:21,801 INFO L226 Difference]: Without dead ends: 2470 [2021-07-09 18:32:21,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:32:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-09 18:32:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-09 18:32:21,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-09 18:32:21,838 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-09 18:32:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:21,838 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-09 18:32:21,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-09 18:32:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:21,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:21,841 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:22,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:32:22,057 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:22,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-07-09 18:32:22,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:22,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626531478] [2021-07-09 18:32:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:22,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:22,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626531478] [2021-07-09 18:32:22,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626531478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:22,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816495658] [2021-07-09 18:32:22,094 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 [2021-07-09 18:32:22,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:32:22,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:22,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:22,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816495658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:22,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:22,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:22,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472707291] [2021-07-09 18:32:22,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:22,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:22,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:22,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:22,209 INFO L87 Difference]: Start difference. First operand 845 states and 2783 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) [2021-07-09 18:32:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:22,873 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-09 18:32:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:32:22,874 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 [2021-07-09 18:32:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:22,881 INFO L225 Difference]: With dead ends: 2514 [2021-07-09 18:32:22,882 INFO L226 Difference]: Without dead ends: 2514 [2021-07-09 18:32:22,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 387.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:32:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-09 18:32:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-09 18:32:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-09 18:32:22,920 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-09 18:32:22,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:22,920 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-09 18:32:22,920 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) [2021-07-09 18:32:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-09 18:32:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:22,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:22,923 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:23,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:32:23,148 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-07-09 18:32:23,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:23,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212397263] [2021-07-09 18:32:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:23,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212397263] [2021-07-09 18:32:23,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212397263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863883952] [2021-07-09 18:32:23,188 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 [2021-07-09 18:32:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:23,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:23,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863883952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:23,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:23,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:23,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953545474] [2021-07-09 18:32:23,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:23,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:23,304 INFO L87 Difference]: Start difference. First operand 853 states and 2815 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) [2021-07-09 18:32:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:23,906 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-09 18:32:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:32:23,907 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 [2021-07-09 18:32:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:23,918 INFO L225 Difference]: With dead ends: 2332 [2021-07-09 18:32:23,918 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 18:32:23,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:32:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 18:32:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-09 18:32:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-09 18:32:23,953 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-09 18:32:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:23,953 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-09 18:32:23,954 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) [2021-07-09 18:32:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-09 18:32:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:23,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:23,956 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:24,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:32:24,177 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-07-09 18:32:24,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:24,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238735763] [2021-07-09 18:32:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:24,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:24,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238735763] [2021-07-09 18:32:24,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238735763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:24,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411900711] [2021-07-09 18:32:24,205 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 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 [2021-07-09 18:32:24,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:32:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:32:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:24,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411900711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:24,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:24,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:32:24,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699775631] [2021-07-09 18:32:24,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:32:24,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:32:24,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:32:24,313 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-09 18:32:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:24,406 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-09 18:32:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:32:24,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 [2021-07-09 18:32:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:24,410 INFO L225 Difference]: With dead ends: 929 [2021-07-09 18:32:24,410 INFO L226 Difference]: Without dead ends: 929 [2021-07-09 18:32:24,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:32:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-09 18:32:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-09 18:32:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 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) [2021-07-09 18:32:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-09 18:32:24,446 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-09 18:32:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:24,446 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-09 18:32:24,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-07-09 18:32:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-09 18:32:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:24,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:24,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:24,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:24,677 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:24,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-07-09 18:32:24,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:24,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609294983] [2021-07-09 18:32:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:24,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:24,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609294983] [2021-07-09 18:32:24,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609294983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:24,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861605863] [2021-07-09 18:32:24,718 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 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 [2021-07-09 18:32:24,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:24,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861605863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:24,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:24,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:32:24,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34809265] [2021-07-09 18:32:24,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:32:24,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:24,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:32:24,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:32:24,793 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-09 18:32:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:25,079 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-09 18:32:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:32:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-07-09 18:32:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:25,083 INFO L225 Difference]: With dead ends: 1555 [2021-07-09 18:32:25,083 INFO L226 Difference]: Without dead ends: 1555 [2021-07-09 18:32:25,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-09 18:32:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-09 18:32:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-09 18:32:25,107 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-09 18:32:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:25,107 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-09 18:32:25,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-09 18:32:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-09 18:32:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:25,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:25,110 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:25,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:25,325 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-07-09 18:32:25,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:25,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389212737] [2021-07-09 18:32:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:25,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389212737] [2021-07-09 18:32:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389212737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:25,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548199817] [2021-07-09 18:32:25,365 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 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 [2021-07-09 18:32:25,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:25,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:25,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548199817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:25,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:25,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:32:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247508431] [2021-07-09 18:32:25,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:32:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:32:25,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:32:25,457 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-09 18:32:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:25,699 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-09 18:32:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:32:25,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-07-09 18:32:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:25,702 INFO L225 Difference]: With dead ends: 1605 [2021-07-09 18:32:25,702 INFO L226 Difference]: Without dead ends: 1605 [2021-07-09 18:32:25,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:32:25,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-09 18:32:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-09 18:32:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-09 18:32:25,727 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-09 18:32:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:25,727 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-09 18:32:25,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-09 18:32:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-09 18:32:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:25,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:25,729 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:25,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:25,954 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:25,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:25,954 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-07-09 18:32:25,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:25,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910443543] [2021-07-09 18:32:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:25,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:25,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910443543] [2021-07-09 18:32:25,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910443543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:25,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488659564] [2021-07-09 18:32:25,989 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 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 [2021-07-09 18:32:26,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:26,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:26,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:26,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:32:26,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488659564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:26,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:26,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:32:26,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444348560] [2021-07-09 18:32:26,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:32:26,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:26,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:32:26,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:32:26,071 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-09 18:32:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:26,268 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-09 18:32:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:32:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-07-09 18:32:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:26,271 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 18:32:26,271 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 18:32:26,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:32:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 18:32:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-09 18:32:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-09 18:32:26,292 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-09 18:32:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:26,292 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-09 18:32:26,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-07-09 18:32:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-09 18:32:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:26,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:26,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:26,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 18:32:26,495 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:26,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-07-09 18:32:26,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:26,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112944579] [2021-07-09 18:32:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:26,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:26,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112944579] [2021-07-09 18:32:26,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112944579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:26,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668206911] [2021-07-09 18:32:26,530 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 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 [2021-07-09 18:32:26,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:32:26,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:26,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:26,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668206911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:26,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:26,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:32:26,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859120654] [2021-07-09 18:32:26,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:32:26,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:32:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:32:26,606 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-09 18:32:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:26,861 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-09 18:32:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:32:26,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-07-09 18:32:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:26,864 INFO L225 Difference]: With dead ends: 1508 [2021-07-09 18:32:26,864 INFO L226 Difference]: Without dead ends: 1496 [2021-07-09 18:32:26,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:32:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-09 18:32:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-09 18:32:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-09 18:32:26,881 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-09 18:32:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:26,881 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-09 18:32:26,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-09 18:32:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-09 18:32:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:26,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:26,884 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:27,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:27,086 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:27,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:27,086 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-07-09 18:32:27,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:27,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234175586] [2021-07-09 18:32:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:27,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:27,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234175586] [2021-07-09 18:32:27,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234175586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:27,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767422807] [2021-07-09 18:32:27,125 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 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 [2021-07-09 18:32:27,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:32:27,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:27,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:27,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767422807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:27,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:27,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349227102] [2021-07-09 18:32:27,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:27,265 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:27,837 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-09 18:32:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:32:27,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-07-09 18:32:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:27,841 INFO L225 Difference]: With dead ends: 2412 [2021-07-09 18:32:27,841 INFO L226 Difference]: Without dead ends: 2412 [2021-07-09 18:32:27,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:32:27,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-09 18:32:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-09 18:32:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-09 18:32:27,868 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-09 18:32:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:27,868 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-09 18:32:27,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-09 18:32:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:27,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:27,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:28,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:32:28,094 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-07-09 18:32:28,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:28,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591968219] [2021-07-09 18:32:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:28,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:28,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591968219] [2021-07-09 18:32:28,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591968219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:28,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830311519] [2021-07-09 18:32:28,144 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 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 [2021-07-09 18:32:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:28,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:28,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830311519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:28,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:28,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:28,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027722633] [2021-07-09 18:32:28,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:28,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:28,268 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:28,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:28,702 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-09 18:32:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:32:28,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-07-09 18:32:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:28,706 INFO L225 Difference]: With dead ends: 2335 [2021-07-09 18:32:28,706 INFO L226 Difference]: Without dead ends: 2335 [2021-07-09 18:32:28,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:32:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-09 18:32:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-09 18:32:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:32:28,735 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:32:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:28,735 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:32:28,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:32:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:32:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:28,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:28,738 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:28,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:28,953 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-07-09 18:32:28,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:28,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970276365] [2021-07-09 18:32:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:28,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:28,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970276365] [2021-07-09 18:32:28,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970276365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:28,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046715654] [2021-07-09 18:32:28,989 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 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 [2021-07-09 18:32:29,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:29,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:29,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046715654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:29,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:29,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:32:29,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742386631] [2021-07-09 18:32:29,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:32:29,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:32:29,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:32:29,093 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:29,507 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-09 18:32:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:32:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-09 18:32:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:29,512 INFO L225 Difference]: With dead ends: 2285 [2021-07-09 18:32:29,513 INFO L226 Difference]: Without dead ends: 2285 [2021-07-09 18:32:29,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:32:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-09 18:32:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-09 18:32:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:32:29,538 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:32:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:29,539 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:32:29,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:32:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:29,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:29,541 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:29,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:32:29,751 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-07-09 18:32:29,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:29,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344760278] [2021-07-09 18:32:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:29,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:29,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344760278] [2021-07-09 18:32:29,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344760278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:29,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961823918] [2021-07-09 18:32:29,789 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 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 [2021-07-09 18:32:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:29,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:29,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961823918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:29,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:29,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:32:29,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340016991] [2021-07-09 18:32:29,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:32:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:29,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:32:29,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:32:29,906 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:30,270 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-09 18:32:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:32:30,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-09 18:32:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:30,274 INFO L225 Difference]: With dead ends: 2176 [2021-07-09 18:32:30,274 INFO L226 Difference]: Without dead ends: 2172 [2021-07-09 18:32:30,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:32:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-09 18:32:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-09 18:32:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:32:30,305 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:32:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:30,305 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:32:30,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:32:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:30,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:30,308 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:30,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:30,532 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-07-09 18:32:30,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:30,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315232479] [2021-07-09 18:32:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:30,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315232479] [2021-07-09 18:32:30,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315232479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632697282] [2021-07-09 18:32:30,567 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 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 [2021-07-09 18:32:30,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:30,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:30,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:30,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:30,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632697282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:30,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:30,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:30,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236006459] [2021-07-09 18:32:30,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:30,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:30,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:30,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:30,676 INFO L87 Difference]: Start difference. First operand 957 states and 3215 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) [2021-07-09 18:32:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:31,092 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-09 18:32:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:32:31,093 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 [2021-07-09 18:32:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:31,096 INFO L225 Difference]: With dead ends: 2199 [2021-07-09 18:32:31,096 INFO L226 Difference]: Without dead ends: 2199 [2021-07-09 18:32:31,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:32:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-09 18:32:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-09 18:32:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:32:31,117 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:32:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:31,117 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:32:31,117 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) [2021-07-09 18:32:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:32:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:31,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:31,119 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:31,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:32:31,320 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:31,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-07-09 18:32:31,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:31,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936667447] [2021-07-09 18:32:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:31,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:31,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936667447] [2021-07-09 18:32:31,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936667447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:31,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519189247] [2021-07-09 18:32:31,357 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 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 [2021-07-09 18:32:31,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:32:31,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:31,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:31,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519189247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:31,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:31,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:31,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500963745] [2021-07-09 18:32:31,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:31,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:31,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:31,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:31,474 INFO L87 Difference]: Start difference. First operand 963 states and 3240 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) [2021-07-09 18:32:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:31,884 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-09 18:32:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:32:31,884 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 [2021-07-09 18:32:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:31,887 INFO L225 Difference]: With dead ends: 2156 [2021-07-09 18:32:31,887 INFO L226 Difference]: Without dead ends: 2152 [2021-07-09 18:32:31,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:32:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-09 18:32:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-09 18:32:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:32:31,913 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:32:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:31,913 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:32:31,913 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) [2021-07-09 18:32:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:32:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:31,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:31,916 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:32,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:32:32,129 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-07-09 18:32:32,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:32,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632846173] [2021-07-09 18:32:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:32,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:32,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632846173] [2021-07-09 18:32:32,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632846173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:32,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978727574] [2021-07-09 18:32:32,166 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 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 [2021-07-09 18:32:32,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:32:32,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:32,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:32,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978727574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:32,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:32,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:32:32,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839505255] [2021-07-09 18:32:32,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:32:32,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:32,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:32:32,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:32:32,281 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-09 18:32:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:32,636 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-09 18:32:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:32:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-09 18:32:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:32,639 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 18:32:32,640 INFO L226 Difference]: Without dead ends: 2097 [2021-07-09 18:32:32,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:32:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-09 18:32:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-09 18:32:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-09 18:32:32,661 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-09 18:32:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:32,661 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-09 18:32:32,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-09 18:32:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-09 18:32:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:32,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:32,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:32,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:32,865 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-07-09 18:32:32,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:32,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890359350] [2021-07-09 18:32:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:32,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:32,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890359350] [2021-07-09 18:32:32,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890359350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:32,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959557757] [2021-07-09 18:32:32,901 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 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 [2021-07-09 18:32:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:32,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:32,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959557757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:32,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:32,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:32:32,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609386837] [2021-07-09 18:32:32,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:32:32,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:32:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:32:32,997 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-09 18:32:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:33,281 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-09 18:32:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:32:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-09 18:32:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:33,285 INFO L225 Difference]: With dead ends: 1963 [2021-07-09 18:32:33,285 INFO L226 Difference]: Without dead ends: 1959 [2021-07-09 18:32:33,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:32:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-09 18:32:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-09 18:32:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-09 18:32:33,320 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-09 18:32:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:33,320 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-09 18:32:33,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-09 18:32:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-09 18:32:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:33,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:33,322 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:33,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-09 18:32:33,538 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:33,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-07-09 18:32:33,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:33,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808932201] [2021-07-09 18:32:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:33,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:33,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808932201] [2021-07-09 18:32:33,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808932201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:33,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30798804] [2021-07-09 18:32:33,575 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 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 [2021-07-09 18:32:33,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:33,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:33,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30798804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:33,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:33,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:32:33,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522696634] [2021-07-09 18:32:33,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:32:33,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:33,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:32:33,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:32:33,667 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-09 18:32:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:33,870 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-09 18:32:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:32:33,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-07-09 18:32:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:33,873 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 18:32:33,873 INFO L226 Difference]: Without dead ends: 1716 [2021-07-09 18:32:33,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:32:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-09 18:32:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-09 18:32:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-09 18:32:33,892 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-09 18:32:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:33,892 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-09 18:32:33,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-07-09 18:32:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-09 18:32:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:33,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:33,895 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:34,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:34,112 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-07-09 18:32:34,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:34,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92370918] [2021-07-09 18:32:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:34,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92370918] [2021-07-09 18:32:34,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92370918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311978031] [2021-07-09 18:32:34,149 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 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 [2021-07-09 18:32:34,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:34,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:34,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311978031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:34,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:34,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:34,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740634412] [2021-07-09 18:32:34,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:34,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:34,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:34,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:34,257 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 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) [2021-07-09 18:32:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:34,572 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-09 18:32:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:32:34,573 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 [2021-07-09 18:32:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:34,575 INFO L225 Difference]: With dead ends: 1821 [2021-07-09 18:32:34,575 INFO L226 Difference]: Without dead ends: 1821 [2021-07-09 18:32:34,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:32:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-09 18:32:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-09 18:32:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-09 18:32:34,595 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-09 18:32:34,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:34,595 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-09 18:32:34,595 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) [2021-07-09 18:32:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-09 18:32:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:34,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:34,598 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:34,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 18:32:34,806 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-07-09 18:32:34,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:34,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497225813] [2021-07-09 18:32:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:34,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497225813] [2021-07-09 18:32:34,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497225813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711610100] [2021-07-09 18:32:34,846 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 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 [2021-07-09 18:32:34,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:34,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:34,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711610100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:34,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:34,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:32:34,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350058671] [2021-07-09 18:32:34,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:32:34,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:32:34,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:32:34,962 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 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) [2021-07-09 18:32:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:35,228 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-09 18:32:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:32:35,228 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 [2021-07-09 18:32:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:35,231 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 18:32:35,231 INFO L226 Difference]: Without dead ends: 1786 [2021-07-09 18:32:35,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:32:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-09 18:32:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-09 18:32:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-09 18:32:35,251 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-09 18:32:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:35,252 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-09 18:32:35,252 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) [2021-07-09 18:32:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-09 18:32:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:32:35,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:35,255 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:35,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:32:35,469 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-07-09 18:32:35,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:35,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943567157] [2021-07-09 18:32:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:35,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:35,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943567157] [2021-07-09 18:32:35,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943567157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453662099] [2021-07-09 18:32:35,507 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 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 [2021-07-09 18:32:35,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:32:35,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:32:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:35,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453662099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:35,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:35,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:32:35,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398532505] [2021-07-09 18:32:35,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:32:35,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:32:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:32:35,615 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:35,788 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-09 18:32:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:32:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 [2021-07-09 18:32:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:35,791 INFO L225 Difference]: With dead ends: 1649 [2021-07-09 18:32:35,791 INFO L226 Difference]: Without dead ends: 1637 [2021-07-09 18:32:35,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:32:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-09 18:32:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-09 18:32:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-09 18:32:35,810 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-09 18:32:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:35,810 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-09 18:32:35,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-07-09 18:32:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-09 18:32:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:35,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:35,813 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:36,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:36,013 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-07-09 18:32:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:36,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12996828] [2021-07-09 18:32:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:36,258 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-07-09 18:32:36,389 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 18:32:36,509 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 18:32:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:36,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:36,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12996828] [2021-07-09 18:32:36,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12996828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:36,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629570829] [2021-07-09 18:32:36,690 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 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 [2021-07-09 18:32:36,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:36,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:32:36,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:37,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:32:37,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:37,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:32:37,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:37,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:37,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:32:37,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:37,319 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:32:37,330 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:37,337 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:32:37,343 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:32:37,362 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:37,370 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:32:37,379 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:32:37,387 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:32:37,393 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,473 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:32:37,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:32:37,477 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:32:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:37,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629570829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:37,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:37,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:32:37,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118477918] [2021-07-09 18:32:37,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:32:37,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:32:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:32:37,541 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:38,134 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-07-09 18:32:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:38,405 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-07-09 18:32:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:32:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:38,408 INFO L225 Difference]: With dead ends: 1531 [2021-07-09 18:32:38,408 INFO L226 Difference]: Without dead ends: 1516 [2021-07-09 18:32:38,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1392.3ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-09 18:32:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-07-09 18:32:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-09 18:32:38,424 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-09 18:32:38,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:38,425 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-09 18:32:38,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-09 18:32:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:38,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:38,427 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:38,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:32:38,636 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:38,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-07-09 18:32:38,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:38,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585989010] [2021-07-09 18:32:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:39,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585989010] [2021-07-09 18:32:39,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585989010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383326557] [2021-07-09 18:32:39,303 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 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 [2021-07-09 18:32:39,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:32:39,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:39,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:32:39,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:39,845 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-09 18:32:39,896 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-07-09 18:32:39,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:39,901 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:39,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:40,008 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:32:40,009 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:32:40,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:40,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:40,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:40,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:40,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:40,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:40,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:40,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:32:40,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:40,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:40,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:40,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:40,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:40,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:40,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:32:40,118 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:32:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:40,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383326557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:40,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:40,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:32:40,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423701101] [2021-07-09 18:32:40,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:32:40,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:40,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:32:40,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:32:40,203 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:41,130 INFO L93 Difference]: Finished difference Result 1509 states and 4945 transitions. [2021-07-09 18:32:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:32:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:41,133 INFO L225 Difference]: With dead ends: 1509 [2021-07-09 18:32:41,133 INFO L226 Difference]: Without dead ends: 1494 [2021-07-09 18:32:41,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1464.5ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-07-09 18:32:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1150. [2021-07-09 18:32:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-09 18:32:41,151 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-09 18:32:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:41,151 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-09 18:32:41,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-09 18:32:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:41,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:41,154 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:41,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:41,356 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-07-09 18:32:41,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:41,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411367962] [2021-07-09 18:32:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:41,925 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-09 18:32:42,110 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-09 18:32:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:42,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:42,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411367962] [2021-07-09 18:32:42,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411367962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:42,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000792939] [2021-07-09 18:32:42,252 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 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 [2021-07-09 18:32:42,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:32:42,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:32:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:43,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:43,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:43,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:43,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:32:43,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:32:43,086 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:32:43,097 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:32:43,109 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:32:43,120 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:32:43,131 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:43,142 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:32:43,156 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:32:43,167 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:43,178 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:43,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:43,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:32:43,185 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:43,223 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:32:43,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:43,225 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:32:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:43,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000792939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:43,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:43,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:32:43,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881444972] [2021-07-09 18:32:43,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:32:43,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:43,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:32:43,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:32:43,266 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:44,334 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2021-07-09 18:32:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:44,952 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-07-09 18:32:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:32:44,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:44,956 INFO L225 Difference]: With dead ends: 1607 [2021-07-09 18:32:44,956 INFO L226 Difference]: Without dead ends: 1592 [2021-07-09 18:32:44,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2264.2ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:32:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-09 18:32:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-07-09 18:32:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-09 18:32:44,981 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-09 18:32:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:44,981 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-09 18:32:44,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-09 18:32:44,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:44,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:44,984 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:45,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:32:45,184 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:45,185 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-07-09 18:32:45,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:45,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126189094] [2021-07-09 18:32:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:45,663 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-07-09 18:32:45,870 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-09 18:32:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:46,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126189094] [2021-07-09 18:32:46,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126189094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246025475] [2021-07-09 18:32:46,121 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 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 [2021-07-09 18:32:46,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:32:46,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:46,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:46,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:46,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:32:46,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,466 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:46,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:32:46,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:46,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-09 18:32:46,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,507 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:46,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:32:46,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,524 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:46,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:32:46,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:46,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:32:46,540 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,555 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:32:46,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,572 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:46,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-07-09 18:32:46,573 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,600 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:46,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-09 18:32:46,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,613 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:46,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:32:46,615 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:46,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:32:46,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:46,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:32:46,646 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:46,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:32:46,667 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:46,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-09 18:32:46,686 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,701 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:32:46,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-09 18:32:46,704 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:46,712 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:32:46,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:32:46,713 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,813 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-07-09 18:32:46,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:46,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:32:46,816 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-07-09 18:32:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:47,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246025475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:47,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:47,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:32:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125907753] [2021-07-09 18:32:47,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:32:47,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:47,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:32:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:32:47,053 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:47,658 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 18:32:47,856 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-07-09 18:32:48,141 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-09 18:32:48,273 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-09 18:32:48,603 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 18:32:48,766 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-09 18:32:49,074 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-09 18:32:49,239 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-09 18:32:49,525 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-07-09 18:32:49,701 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 18:32:50,326 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-07-09 18:32:50,626 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-07-09 18:32:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:50,769 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-07-09 18:32:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:32:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:50,774 INFO L225 Difference]: With dead ends: 1843 [2021-07-09 18:32:50,774 INFO L226 Difference]: Without dead ends: 1828 [2021-07-09 18:32:50,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3911.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:32:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-07-09 18:32:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-07-09 18:32:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-09 18:32:50,798 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-09 18:32:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:50,798 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-09 18:32:50,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-09 18:32:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:50,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:50,800 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:51,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:51,001 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-07-09 18:32:51,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:51,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624184000] [2021-07-09 18:32:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:51,515 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 18:32:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:51,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:51,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624184000] [2021-07-09 18:32:51,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624184000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:51,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943593455] [2021-07-09 18:32:51,714 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 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 [2021-07-09 18:32:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:32:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:52,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:32:52,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:52,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:32:52,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:52,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:32:52,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:32:52,460 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:32:52,472 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:52,484 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:32:52,494 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:32:52,504 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:32:52,515 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:32:52,524 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:32:52,535 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:32:52,544 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:52,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:52,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:32:52,551 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,578 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:32:52,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:52,580 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:32:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:52,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943593455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:52,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:52,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:32:52,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842121307] [2021-07-09 18:32:52,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:32:52,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:52,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:32:52,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:32:52,613 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:53,855 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-07-09 18:32:54,070 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-09 18:32:54,225 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-09 18:32:54,358 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-07-09 18:32:54,712 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-07-09 18:32:54,882 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-07-09 18:32:55,195 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:32:55,339 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-07-09 18:32:55,833 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 18:32:56,034 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-09 18:32:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:56,176 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-07-09 18:32:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:32:56,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:32:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:56,180 INFO L225 Difference]: With dead ends: 1877 [2021-07-09 18:32:56,180 INFO L226 Difference]: Without dead ends: 1862 [2021-07-09 18:32:56,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3671.4ms TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:32:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-07-09 18:32:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-07-09 18:32:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-09 18:32:56,200 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-09 18:32:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:56,200 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-09 18:32:56,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-09 18:32:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:32:56,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:56,202 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:56,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:56,403 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:56,403 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-07-09 18:32:56,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:56,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102487345] [2021-07-09 18:32:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:57,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:57,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102487345] [2021-07-09 18:32:57,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102487345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:57,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317593994] [2021-07-09 18:32:57,013 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 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 [2021-07-09 18:32:57,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:57,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:57,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,767 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:32:57,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:32:57,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,808 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-09 18:32:57,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:32:57,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,849 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:32:57,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-07-09 18:32:57,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,899 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-07-09 18:32:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-07-09 18:32:57,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,923 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:32:57,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-09 18:32:57,924 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,941 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:32:57,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:32:57,942 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,968 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-07-09 18:32:57,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-07-09 18:32:57,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,987 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:32:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:32:57,988 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,027 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-09 18:32:58,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:32:58,029 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,046 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:32:58,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:32:58,047 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,073 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:32:58,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:32:58,089 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,122 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:32:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-09 18:32:58,124 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:58,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-09 18:32:58,168 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,188 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:32:58,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:32:58,189 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,205 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:32:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:32:58,205 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:58,219 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:32:58,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:32:58,220 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:58,342 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-07-09 18:32:58,342 INFO L628 ElimStorePlain]: treesize reduction 126, result has 51.4 percent of original size [2021-07-09 18:32:58,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:32:58,351 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-07-09 18:32:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:58,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317593994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:58,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:58,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-09 18:32:58,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849547849] [2021-07-09 18:32:58,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:32:58,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:58,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:32:58,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:32:58,517 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:59,948 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 18:33:00,079 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-09 18:33:00,292 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2021-07-09 18:33:00,427 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-07-09 18:33:00,774 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-09 18:33:01,320 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-07-09 18:33:01,469 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 18:33:01,625 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-09 18:33:01,966 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-09 18:33:02,286 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-07-09 18:33:02,455 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-07-09 18:33:02,711 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-09 18:33:03,010 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-09 18:33:03,137 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-07-09 18:33:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:03,273 INFO L93 Difference]: Finished difference Result 2051 states and 6324 transitions. [2021-07-09 18:33:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:33:03,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:03,277 INFO L225 Difference]: With dead ends: 2051 [2021-07-09 18:33:03,277 INFO L226 Difference]: Without dead ends: 2006 [2021-07-09 18:33:03,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 4906.2ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:33:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-07-09 18:33:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-07-09 18:33:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-07-09 18:33:03,298 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-07-09 18:33:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:03,298 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-07-09 18:33:03,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-07-09 18:33:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:03,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:03,300 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:03,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-07-09 18:33:03,501 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-07-09 18:33:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:03,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757661050] [2021-07-09 18:33:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:03,757 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-07-09 18:33:03,871 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 18:33:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:04,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:04,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757661050] [2021-07-09 18:33:04,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757661050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:04,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976491413] [2021-07-09 18:33:04,141 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 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 [2021-07-09 18:33:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:04,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:04,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:33:04,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:04,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:04,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:33:04,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:04,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:04,686 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:04,694 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:04,702 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:33:04,709 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:04,717 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:33:04,725 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:04,734 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:04,742 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:33:04,747 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,826 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:33:04,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:33:04,828 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:33:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:04,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976491413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:04,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:04,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:33:04,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739348728] [2021-07-09 18:33:04,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:33:04,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:04,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:33:04,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:33:04,893 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:05,453 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-07-09 18:33:05,858 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-07-09 18:33:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:06,941 INFO L93 Difference]: Finished difference Result 1960 states and 6315 transitions. [2021-07-09 18:33:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:33:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:06,945 INFO L225 Difference]: With dead ends: 1960 [2021-07-09 18:33:06,945 INFO L226 Difference]: Without dead ends: 1945 [2021-07-09 18:33:06,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2263.6ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:33:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-09 18:33:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-07-09 18:33:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.3202247191011236) internal successors, (4728), 1424 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4728 transitions. [2021-07-09 18:33:06,968 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4728 transitions. Word has length 26 [2021-07-09 18:33:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:06,968 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4728 transitions. [2021-07-09 18:33:06,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4728 transitions. [2021-07-09 18:33:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:06,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:06,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:07,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:07,185 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-07-09 18:33:07,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:07,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124504239] [2021-07-09 18:33:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:07,410 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-07-09 18:33:07,536 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:33:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:07,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:07,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124504239] [2021-07-09 18:33:07,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124504239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:07,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474218770] [2021-07-09 18:33:07,835 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 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 [2021-07-09 18:33:07,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:07,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:07,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:33:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:08,278 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:33:08,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-07-09 18:33:08,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,555 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-09 18:33:08,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,586 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:33:08,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-09 18:33:08,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,743 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-09 18:33:08,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,767 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:33:08,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-07-09 18:33:08,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,917 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 18:33:08,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,942 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:33:08,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-07-09 18:33:08,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:09,099 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:33:09,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:09,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:09,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:09,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-07-09 18:33:09,124 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:09,253 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:33:09,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:09,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:09,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:09,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-07-09 18:33:09,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:09,405 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:33:09,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:09,432 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:33:09,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 18:33:09,434 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:09,562 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 18:33:09,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:09,582 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:33:09,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:33:09,584 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:09,720 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 18:33:09,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:09,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:33:09,752 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-07-09 18:33:10,038 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-09 18:33:10,260 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-07-09 18:33:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:10,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474218770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:10,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:10,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:33:10,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206717935] [2021-07-09 18:33:10,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:33:10,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:33:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:33:10,375 INFO L87 Difference]: Start difference. First operand 1425 states and 4728 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:11,231 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 41 [2021-07-09 18:33:11,572 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-07-09 18:33:11,969 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-07-09 18:33:12,380 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-07-09 18:33:12,712 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2021-07-09 18:33:12,842 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-09 18:33:13,099 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:33:13,597 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-09 18:33:14,035 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-07-09 18:33:14,186 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-09 18:33:14,542 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-07-09 18:33:14,894 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-07-09 18:33:15,374 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-07-09 18:33:15,725 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2021-07-09 18:33:16,312 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-07-09 18:33:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:16,394 INFO L93 Difference]: Finished difference Result 2026 states and 6474 transitions. [2021-07-09 18:33:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:33:16,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:16,398 INFO L225 Difference]: With dead ends: 2026 [2021-07-09 18:33:16,398 INFO L226 Difference]: Without dead ends: 2011 [2021-07-09 18:33:16,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 6513.1ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:33:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-07-09 18:33:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1444. [2021-07-09 18:33:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.324324324324324) internal successors, (4797), 1443 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4797 transitions. [2021-07-09 18:33:16,429 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4797 transitions. Word has length 26 [2021-07-09 18:33:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:16,429 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4797 transitions. [2021-07-09 18:33:16,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4797 transitions. [2021-07-09 18:33:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:16,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:16,432 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:16,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-09 18:33:16,633 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1506197498, now seen corresponding path program 9 times [2021-07-09 18:33:16,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:16,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654241587] [2021-07-09 18:33:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:17,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654241587] [2021-07-09 18:33:17,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654241587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608914954] [2021-07-09 18:33:17,132 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 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 [2021-07-09 18:33:17,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:33:17,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:33:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:17,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:17,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:17,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:17,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:17,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:17,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:17,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:33:17,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:17,962 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-09 18:33:17,963 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-07-09 18:33:17,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:17,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:17,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:17,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:17,979 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:17,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:18,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:18,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:18,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:18,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:18,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:18,085 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-07-09 18:33:18,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:33:18,088 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-07-09 18:33:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:18,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608914954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:18,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:18,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:33:18,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614408569] [2021-07-09 18:33:18,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:33:18,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:18,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:33:18,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:18,147 INFO L87 Difference]: Start difference. First operand 1444 states and 4797 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:18,801 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-07-09 18:33:19,000 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-09 18:33:19,280 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:33:19,474 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-07-09 18:33:19,851 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-07-09 18:33:20,166 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 18:33:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:20,226 INFO L93 Difference]: Finished difference Result 2027 states and 6512 transitions. [2021-07-09 18:33:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:33:20,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:20,231 INFO L225 Difference]: With dead ends: 2027 [2021-07-09 18:33:20,231 INFO L226 Difference]: Without dead ends: 2012 [2021-07-09 18:33:20,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2598.1ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:33:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-07-09 18:33:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1454. [2021-07-09 18:33:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3269098417068137) internal successors, (4834), 1453 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4834 transitions. [2021-07-09 18:33:20,259 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4834 transitions. Word has length 26 [2021-07-09 18:33:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:20,259 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4834 transitions. [2021-07-09 18:33:20,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4834 transitions. [2021-07-09 18:33:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:20,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:20,261 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:20,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:20,462 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:20,462 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 10 times [2021-07-09 18:33:20,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:20,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414578105] [2021-07-09 18:33:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:20,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:20,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414578105] [2021-07-09 18:33:20,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414578105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:20,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491863969] [2021-07-09 18:33:20,915 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 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 [2021-07-09 18:33:20,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:20,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:21,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:33:21,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:21,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:33:21,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,255 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:21,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:33:21,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,271 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:21,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:33:21,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:21,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-09 18:33:21,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:21,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:33:21,301 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:21,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:33:21,312 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:21,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:33:21,330 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:33:21,343 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:21,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-09 18:33:21,361 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,373 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:21,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:33:21,374 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:21,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:33:21,386 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,399 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:21,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:33:21,401 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,412 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:33:21,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:33:21,412 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:21,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:33:21,427 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:21,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:21,440 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:21,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-09 18:33:21,442 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:21,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:21,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:33:21,516 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-09 18:33:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:21,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491863969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:21,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:21,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:33:21,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691660524] [2021-07-09 18:33:21,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:33:21,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:33:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:33:21,740 INFO L87 Difference]: Start difference. First operand 1454 states and 4834 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:23,793 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-09 18:33:24,091 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-07-09 18:33:24,324 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 18:33:24,563 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-09 18:33:24,709 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:33:24,917 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-07-09 18:33:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:25,058 INFO L93 Difference]: Finished difference Result 2385 states and 7601 transitions. [2021-07-09 18:33:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:33:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:25,063 INFO L225 Difference]: With dead ends: 2385 [2021-07-09 18:33:25,063 INFO L226 Difference]: Without dead ends: 2355 [2021-07-09 18:33:25,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3381.1ms TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:33:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-07-09 18:33:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1467. [2021-07-09 18:33:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.3342428376534787) internal successors, (4888), 1466 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4888 transitions. [2021-07-09 18:33:25,096 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4888 transitions. Word has length 26 [2021-07-09 18:33:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:25,096 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4888 transitions. [2021-07-09 18:33:25,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4888 transitions. [2021-07-09 18:33:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:25,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:25,098 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:25,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-09 18:33:25,299 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 11 times [2021-07-09 18:33:25,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:25,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741621724] [2021-07-09 18:33:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:25,624 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-07-09 18:33:25,738 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-09 18:33:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:25,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:25,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741621724] [2021-07-09 18:33:25,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741621724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:25,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438179646] [2021-07-09 18:33:25,940 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 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 [2021-07-09 18:33:25,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:33:25,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:26,420 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:33:26,658 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-07-09 18:33:26,730 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_37], 2=[v_prenex_39, v_prenex_38]} [2021-07-09 18:33:26,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:33:26,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:26,845 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:33:26,845 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.0 percent of original size [2021-07-09 18:33:26,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:26,849 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:26,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:26,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:26,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:26,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:26,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:26,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:26,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:26,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:26,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:26,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:26,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:26,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:26,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:26,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:26,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:26,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:26,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:33:26,991 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:205, output treesize:51 [2021-07-09 18:33:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:27,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438179646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:27,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:27,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:33:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195452402] [2021-07-09 18:33:27,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:33:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:33:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:33:27,051 INFO L87 Difference]: Start difference. First operand 1467 states and 4888 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:27,683 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-09 18:33:27,918 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 18:33:28,279 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-09 18:33:28,544 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-09 18:33:29,043 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-09 18:33:29,446 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-07-09 18:33:29,667 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-09 18:33:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:29,860 INFO L93 Difference]: Finished difference Result 1957 states and 6396 transitions. [2021-07-09 18:33:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:33:29,861 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:29,865 INFO L225 Difference]: With dead ends: 1957 [2021-07-09 18:33:29,865 INFO L226 Difference]: Without dead ends: 1942 [2021-07-09 18:33:29,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 3291.7ms TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:33:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-07-09 18:33:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1470. [2021-07-09 18:33:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.3356024506466984) internal successors, (4900), 1469 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4900 transitions. [2021-07-09 18:33:29,891 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4900 transitions. Word has length 26 [2021-07-09 18:33:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:29,891 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4900 transitions. [2021-07-09 18:33:29,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4900 transitions. [2021-07-09 18:33:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:29,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:29,895 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:30,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-09 18:33:30,110 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:30,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1300110838, now seen corresponding path program 12 times [2021-07-09 18:33:30,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:30,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044735195] [2021-07-09 18:33:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:30,458 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-09 18:33:30,596 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-09 18:33:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:30,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:30,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044735195] [2021-07-09 18:33:30,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044735195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876947776] [2021-07-09 18:33:30,658 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 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 [2021-07-09 18:33:30,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:33:30,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:30,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:31,004 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-09 18:33:31,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:31,071 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:31,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:33:31,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:31,185 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:33:31,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:31,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:33:31,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:31,310 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:33:31,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:31,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:33:31,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:31,435 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:33:31,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:31,447 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:31,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:33:31,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:31,555 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:33:31,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:31,568 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:31,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:33:31,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:31,672 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:33:31,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:31,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:33:31,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:31,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:31,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:33:31,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:31,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:31,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:31,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:33:31,914 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:32,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:32,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:33:32,009 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:33:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:32,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876947776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:32,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:32,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:33:32,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504071693] [2021-07-09 18:33:32,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:33:32,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:32,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:33:32,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:32,208 INFO L87 Difference]: Start difference. First operand 1470 states and 4900 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:32,539 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-09 18:33:32,949 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-07-09 18:33:33,293 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-09 18:33:33,573 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:33:33,862 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-07-09 18:33:34,075 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:33:34,258 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-07-09 18:33:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:34,337 INFO L93 Difference]: Finished difference Result 2349 states and 7518 transitions. [2021-07-09 18:33:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:33:34,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:34,342 INFO L225 Difference]: With dead ends: 2349 [2021-07-09 18:33:34,342 INFO L226 Difference]: Without dead ends: 2319 [2021-07-09 18:33:34,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2553.5ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:33:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-09 18:33:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1476. [2021-07-09 18:33:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3403389830508474) internal successors, (4927), 1475 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4927 transitions. [2021-07-09 18:33:34,368 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4927 transitions. Word has length 26 [2021-07-09 18:33:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:34,368 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4927 transitions. [2021-07-09 18:33:34,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4927 transitions. [2021-07-09 18:33:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:34,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:34,371 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:34,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:34,573 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:34,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-07-09 18:33:34,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:34,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536438877] [2021-07-09 18:33:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:35,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536438877] [2021-07-09 18:33:35,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536438877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451040862] [2021-07-09 18:33:35,038 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 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 [2021-07-09 18:33:35,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:33:35,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:35,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:33:35,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:35,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-07-09 18:33:35,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:33:35,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-09 18:33:35,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-07-09 18:33:35,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:33:35,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-09 18:33:35,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-09 18:33:35,495 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-07-09 18:33:35,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-07-09 18:33:35,515 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:33:35,538 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-07-09 18:33:35,551 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:33:35,564 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-09 18:33:35,577 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-09 18:33:35,587 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-09 18:33:35,596 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:35,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:35,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:33:35,602 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:35,642 INFO L628 ElimStorePlain]: treesize reduction 48, result has 49.5 percent of original size [2021-07-09 18:33:35,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:35,643 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:921, output treesize:47 [2021-07-09 18:33:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:35,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451040862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:35,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:35,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:33:35,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215275997] [2021-07-09 18:33:35,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:33:35,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:35,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:33:35,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:33:35,723 INFO L87 Difference]: Start difference. First operand 1476 states and 4927 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:36,283 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-09 18:33:36,581 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 18:33:36,736 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-09 18:33:36,911 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-07-09 18:33:37,480 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-09 18:33:37,916 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-09 18:33:38,148 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-07-09 18:33:38,690 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-07-09 18:33:39,396 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-09 18:33:39,574 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-07-09 18:33:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:39,878 INFO L93 Difference]: Finished difference Result 3196 states and 9983 transitions. [2021-07-09 18:33:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:33:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:39,884 INFO L225 Difference]: With dead ends: 3196 [2021-07-09 18:33:39,884 INFO L226 Difference]: Without dead ends: 3109 [2021-07-09 18:33:39,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 4124.1ms TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:33:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-07-09 18:33:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1509. [2021-07-09 18:33:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.343501326259947) internal successors, (5042), 1508 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5042 transitions. [2021-07-09 18:33:39,917 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5042 transitions. Word has length 26 [2021-07-09 18:33:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:39,918 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5042 transitions. [2021-07-09 18:33:39,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5042 transitions. [2021-07-09 18:33:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:39,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:39,920 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:40,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-07-09 18:33:40,121 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-07-09 18:33:40,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:40,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721763845] [2021-07-09 18:33:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:40,456 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-09 18:33:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:40,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:40,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721763845] [2021-07-09 18:33:40,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721763845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:40,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133340144] [2021-07-09 18:33:40,764 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 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 [2021-07-09 18:33:40,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:40,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:40,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:33:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:33:41,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:33:41,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:33:41,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-09 18:33:41,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:33:41,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:33:41,482 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-09 18:33:41,492 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:33:41,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:33:41,526 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-09 18:33:41,535 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:33:41,544 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:33:41,552 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:33:41,562 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:33:41,570 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:33:41,578 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:41,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:41,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:33:41,582 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:41,616 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-09 18:33:41,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:41,617 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-07-09 18:33:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:41,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133340144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:41,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:41,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:33:41,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700861881] [2021-07-09 18:33:41,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:33:41,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:41,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:33:41,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:33:41,654 INFO L87 Difference]: Start difference. First operand 1509 states and 5042 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:42,188 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-07-09 18:33:42,520 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-09 18:33:42,671 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-07-09 18:33:43,138 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-09 18:33:43,622 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-07-09 18:33:43,943 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-07-09 18:33:44,453 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-07-09 18:33:44,613 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-09 18:33:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:44,855 INFO L93 Difference]: Finished difference Result 2965 states and 9388 transitions. [2021-07-09 18:33:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:33:44,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:44,861 INFO L225 Difference]: With dead ends: 2965 [2021-07-09 18:33:44,861 INFO L226 Difference]: Without dead ends: 2920 [2021-07-09 18:33:44,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3338.4ms TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:33:44,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-07-09 18:33:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1512. [2021-07-09 18:33:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.345466578424884) internal successors, (5055), 1511 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5055 transitions. [2021-07-09 18:33:44,890 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5055 transitions. Word has length 26 [2021-07-09 18:33:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:44,890 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5055 transitions. [2021-07-09 18:33:44,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5055 transitions. [2021-07-09 18:33:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:44,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:44,893 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:45,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-07-09 18:33:45,094 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:45,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:45,094 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-07-09 18:33:45,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:45,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232382268] [2021-07-09 18:33:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:45,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:45,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232382268] [2021-07-09 18:33:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232382268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:45,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654183208] [2021-07-09 18:33:45,656 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 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 [2021-07-09 18:33:45,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:33:45,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:45,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:33:45,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:46,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,207 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:33:46,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-07-09 18:33:46,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,236 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:33:46,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-09 18:33:46,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:46,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-09 18:33:46,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,309 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:33:46,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:33:46,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,329 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-07-09 18:33:46,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,354 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:33:46,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-09 18:33:46,356 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,381 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-09 18:33:46,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-07-09 18:33:46,383 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,403 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:33:46,403 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,420 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:33:46,421 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,438 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:33:46,439 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,456 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:33:46,457 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,483 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:33:46,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-09 18:33:46,485 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,502 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:33:46,502 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,519 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:33:46,520 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,553 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:33:46,554 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:46,565 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:33:46,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:33:46,566 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:46,670 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-09 18:33:46,671 INFO L628 ElimStorePlain]: treesize reduction 69, result has 64.2 percent of original size [2021-07-09 18:33:46,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:33:46,673 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-09 18:33:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:46,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654183208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:46,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:46,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:33:46,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114726020] [2021-07-09 18:33:46,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:33:46,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:46,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:33:46,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:33:46,812 INFO L87 Difference]: Start difference. First operand 1512 states and 5055 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:47,296 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-09 18:33:47,411 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-07-09 18:33:47,844 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-07-09 18:33:48,071 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-07-09 18:33:48,412 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-09 18:33:48,596 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-07-09 18:33:48,830 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-07-09 18:33:49,209 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-07-09 18:33:49,715 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-07-09 18:33:50,187 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-07-09 18:33:50,439 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-09 18:33:50,621 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-07-09 18:33:50,880 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-09 18:33:51,105 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-07-09 18:33:51,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:51,691 INFO L93 Difference]: Finished difference Result 3428 states and 10667 transitions. [2021-07-09 18:33:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:33:51,692 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:51,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:51,698 INFO L225 Difference]: With dead ends: 3428 [2021-07-09 18:33:51,698 INFO L226 Difference]: Without dead ends: 3368 [2021-07-09 18:33:51,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4788.6ms TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:33:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-07-09 18:33:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1525. [2021-07-09 18:33:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.356299212598425) internal successors, (5115), 1524 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5115 transitions. [2021-07-09 18:33:51,731 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5115 transitions. Word has length 26 [2021-07-09 18:33:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:51,731 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 5115 transitions. [2021-07-09 18:33:51,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5115 transitions. [2021-07-09 18:33:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:51,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:51,734 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:51,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-07-09 18:33:51,934 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-07-09 18:33:51,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:51,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821743498] [2021-07-09 18:33:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:52,327 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-07-09 18:33:52,511 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-07-09 18:33:52,688 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-09 18:33:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:52,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:52,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821743498] [2021-07-09 18:33:52,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821743498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:52,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973322367] [2021-07-09 18:33:52,813 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 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 [2021-07-09 18:33:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:52,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:52,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:53,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:53,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:33:53,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:53,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:53,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:53,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:53,260 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:33:53,266 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:53,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:33:53,277 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:53,284 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:33:53,290 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:53,296 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:33:53,301 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:33:53,307 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:53,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:53,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:33:53,311 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:53,386 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:33:53,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:33:53,387 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:33:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973322367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:53,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:53,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:33:53,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584740132] [2021-07-09 18:33:53,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:33:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:33:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:53,439 INFO L87 Difference]: Start difference. First operand 1525 states and 5115 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:54,251 INFO L93 Difference]: Finished difference Result 1908 states and 6274 transitions. [2021-07-09 18:33:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:33:54,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:33:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:54,255 INFO L225 Difference]: With dead ends: 1908 [2021-07-09 18:33:54,255 INFO L226 Difference]: Without dead ends: 1893 [2021-07-09 18:33:54,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1564.0ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:33:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-07-09 18:33:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1533. [2021-07-09 18:33:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.352480417754569) internal successors, (5136), 1532 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5136 transitions. [2021-07-09 18:33:54,287 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5136 transitions. Word has length 26 [2021-07-09 18:33:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:54,287 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5136 transitions. [2021-07-09 18:33:54,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5136 transitions. [2021-07-09 18:33:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:33:54,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:54,291 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:54,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-09 18:33:54,515 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:54,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:54,515 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-07-09 18:33:54,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:54,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836067691] [2021-07-09 18:33:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:54,751 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-07-09 18:33:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:55,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:55,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836067691] [2021-07-09 18:33:55,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836067691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:55,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387537134] [2021-07-09 18:33:55,199 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 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 [2021-07-09 18:33:55,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:55,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:33:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:55,605 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:33:55,696 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_60, v_prenex_62], 3=[A, v_prenex_54, v_prenex_64, v_prenex_58, v_prenex_56, v_prenex_66]} [2021-07-09 18:33:55,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:33:55,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:55,925 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-07-09 18:33:55,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:55,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:55,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:33:55,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:56,150 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 18:33:56,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:56,182 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:33:56,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-09 18:33:56,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:56,356 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:33:56,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:56,379 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:33:56,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:33:56,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:56,521 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-09 18:33:56,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:56,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:56,542 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:33:56,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:33:56,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:56,679 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-09 18:33:56,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:56,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:56,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-09 18:33:56,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:56,832 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:33:56,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:56,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:56,850 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:33:56,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-09 18:33:56,852 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:56,992 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-09 18:33:56,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:56,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:57,013 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:33:57,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:33:57,015 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:57,147 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:33:57,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:57,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:33:57,162 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:391, output treesize:457 [2021-07-09 18:33:57,477 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-07-09 18:33:57,691 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-09 18:33:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:57,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387537134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:57,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:33:57,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873775321] [2021-07-09 18:33:57,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:33:57,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:33:57,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:33:57,790 INFO L87 Difference]: Start difference. First operand 1533 states and 5136 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:58,046 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 21 [2021-07-09 18:33:58,820 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2021-07-09 18:33:59,272 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:33:59,873 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-07-09 18:34:00,062 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:34:00,499 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-09 18:34:00,953 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-07-09 18:34:01,324 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-07-09 18:34:01,563 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-07-09 18:34:02,063 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-07-09 18:34:02,301 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2021-07-09 18:34:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:02,362 INFO L93 Difference]: Finished difference Result 2211 states and 7083 transitions. [2021-07-09 18:34:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:34:02,363 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:02,367 INFO L225 Difference]: With dead ends: 2211 [2021-07-09 18:34:02,367 INFO L226 Difference]: Without dead ends: 2181 [2021-07-09 18:34:02,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 5288.8ms TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:34:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-07-09 18:34:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1518. [2021-07-09 18:34:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3513513513513513) internal successors, (5084), 1517 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5084 transitions. [2021-07-09 18:34:02,403 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5084 transitions. Word has length 26 [2021-07-09 18:34:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:02,403 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5084 transitions. [2021-07-09 18:34:02,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5084 transitions. [2021-07-09 18:34:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:02,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:02,406 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:02,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:02,626 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 15 times [2021-07-09 18:34:02,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:02,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303996009] [2021-07-09 18:34:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:02,923 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-09 18:34:03,048 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-07-09 18:34:03,247 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-09 18:34:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:03,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:03,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303996009] [2021-07-09 18:34:03,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303996009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:03,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786397073] [2021-07-09 18:34:03,427 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 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 [2021-07-09 18:34:03,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:03,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:03,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:34:03,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:03,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:03,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:34:03,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:03,850 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:03,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:34:03,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:03,872 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:34:03,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:34:03,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:03,896 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:34:03,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:34:03,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:03,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:03,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:34:03,924 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:03,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:03,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:34:03,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:03,957 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:03,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:03,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:03,971 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:03,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:34:03,977 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:03,987 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:03,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:03,988 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,007 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:04,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:34:04,011 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,040 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:04,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:34:04,046 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,059 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:04,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:04,061 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,073 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:04,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:04,074 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,087 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:04,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:04,089 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,101 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:04,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:04,102 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,119 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:04,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:34:04,121 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,231 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-07-09 18:34:04,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:04,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:04,263 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:430 [2021-07-09 18:34:04,600 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-09 18:34:04,823 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:34:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:04,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786397073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:04,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:04,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:34:04,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425965556] [2021-07-09 18:34:04,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:34:04,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:34:04,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:04,953 INFO L87 Difference]: Start difference. First operand 1518 states and 5084 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,739 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-07-09 18:34:06,136 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-07-09 18:34:06,435 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-07-09 18:34:06,629 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-07-09 18:34:06,891 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 58 [2021-07-09 18:34:07,055 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-09 18:34:07,284 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-09 18:34:07,559 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:34:07,851 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-09 18:34:08,136 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-09 18:34:08,451 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-07-09 18:34:08,711 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2021-07-09 18:34:09,075 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-07-09 18:34:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:09,160 INFO L93 Difference]: Finished difference Result 2207 states and 7076 transitions. [2021-07-09 18:34:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:34:09,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:09,164 INFO L225 Difference]: With dead ends: 2207 [2021-07-09 18:34:09,165 INFO L226 Difference]: Without dead ends: 2192 [2021-07-09 18:34:09,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4941.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:34:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-07-09 18:34:09,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1522. [2021-07-09 18:34:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.356344510190664) internal successors, (5105), 1521 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5105 transitions. [2021-07-09 18:34:09,196 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5105 transitions. Word has length 26 [2021-07-09 18:34:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:09,196 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5105 transitions. [2021-07-09 18:34:09,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5105 transitions. [2021-07-09 18:34:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:09,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:09,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:09,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:09,401 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 16 times [2021-07-09 18:34:09,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:09,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906394216] [2021-07-09 18:34:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:09,839 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-07-09 18:34:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:09,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906394216] [2021-07-09 18:34:09,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906394216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727911476] [2021-07-09 18:34:09,994 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 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 [2021-07-09 18:34:10,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:10,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:10,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:10,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:10,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:10,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:10,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:34:10,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:10,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:10,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:10,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:34:10,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,457 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:10,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:34:10,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,470 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:10,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,483 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:10,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:10,484 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,496 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:10,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:10,497 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:10,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:34:10,517 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:10,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:34:10,534 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,553 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:10,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:10,555 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,567 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:10,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:10,568 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,582 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:10,584 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,631 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:10,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:10,632 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:10,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:34:10,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:10,653 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:10,654 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:10,787 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-07-09 18:34:10,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:10,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:10,796 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-07-09 18:34:10,965 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-07-09 18:34:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:11,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727911476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:11,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:34:11,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901754531] [2021-07-09 18:34:11,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:11,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:11,068 INFO L87 Difference]: Start difference. First operand 1522 states and 5105 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) [2021-07-09 18:34:11,863 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 18:34:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:11,901 INFO L93 Difference]: Finished difference Result 2055 states and 6709 transitions. [2021-07-09 18:34:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:11,902 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 26 [2021-07-09 18:34:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:11,905 INFO L225 Difference]: With dead ends: 2055 [2021-07-09 18:34:11,905 INFO L226 Difference]: Without dead ends: 2040 [2021-07-09 18:34:11,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1450.1ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:34:11,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-07-09 18:34:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1529. [2021-07-09 18:34:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-07-09 18:34:11,934 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-07-09 18:34:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:11,934 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-07-09 18:34:11,934 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) [2021-07-09 18:34:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-07-09 18:34:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:11,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:11,937 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:12,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:12,137 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:12,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:12,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-07-09 18:34:12,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:12,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676033670] [2021-07-09 18:34:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:12,333 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-09 18:34:12,452 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-07-09 18:34:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:12,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:12,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676033670] [2021-07-09 18:34:12,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676033670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:12,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400592392] [2021-07-09 18:34:12,650 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 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 [2021-07-09 18:34:12,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:12,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:12,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:34:12,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:13,024 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-09 18:34:13,254 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-07-09 18:34:13,325 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_76], 2=[A, v_prenex_75]} [2021-07-09 18:34:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:13,329 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:13,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:13,437 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-09 18:34:13,445 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:34:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:13,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:13,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:13,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:13,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:13,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:13,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:13,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:13,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:13,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:13,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:13,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:13,544 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:34:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:13,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400592392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:13,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:13,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:34:13,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821146971] [2021-07-09 18:34:13,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:34:13,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:34:13,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:13,614 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:14,314 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-07-09 18:34:14,749 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:34:15,097 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-09 18:34:15,284 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-07-09 18:34:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:15,413 INFO L93 Difference]: Finished difference Result 2067 states and 6781 transitions. [2021-07-09 18:34:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:34:15,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:15,416 INFO L225 Difference]: With dead ends: 2067 [2021-07-09 18:34:15,416 INFO L226 Difference]: Without dead ends: 2052 [2021-07-09 18:34:15,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2391.6ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:34:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-07-09 18:34:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1532. [2021-07-09 18:34:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.357282821685173) internal successors, (5140), 1531 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5140 transitions. [2021-07-09 18:34:15,448 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5140 transitions. Word has length 26 [2021-07-09 18:34:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:15,448 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5140 transitions. [2021-07-09 18:34:15,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5140 transitions. [2021-07-09 18:34:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:15,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:15,452 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:15,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-07-09 18:34:15,665 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:15,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-07-09 18:34:15,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:15,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372367640] [2021-07-09 18:34:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:15,856 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-07-09 18:34:16,099 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-09 18:34:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:16,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372367640] [2021-07-09 18:34:16,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372367640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310855297] [2021-07-09 18:34:16,233 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 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 [2021-07-09 18:34:16,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:16,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:16,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:16,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:16,707 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-09 18:34:16,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:16,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:16,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:34:16,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:17,292 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2021-07-09 18:34:17,293 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-07-09 18:34:17,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:17,317 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:17,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:34:17,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:17,453 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-09 18:34:17,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:17,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:17,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:17,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:34:17,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:17,629 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-09 18:34:17,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:17,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:17,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:34:17,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:17,898 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-07-09 18:34:17,899 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-07-09 18:34:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:17,920 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:34:17,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:34:17,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:18,042 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 18:34:18,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:18,067 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:18,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:34:18,068 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:18,190 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-07-09 18:34:18,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:18,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:18,213 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:18,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:34:18,217 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:18,332 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:34:18,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:18,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:18,352 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:34:18,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:34:18,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:18,473 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 18:34:18,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:18,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:18,494 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-07-09 18:34:18,701 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 18:34:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:18,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310855297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:18,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:18,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:18,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038458390] [2021-07-09 18:34:18,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:18,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:18,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:18,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:18,801 INFO L87 Difference]: Start difference. First operand 1532 states and 5140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:19,449 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-09 18:34:19,747 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-07-09 18:34:20,313 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-07-09 18:34:20,578 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-07-09 18:34:20,921 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 18:34:21,461 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-07-09 18:34:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:21,512 INFO L93 Difference]: Finished difference Result 2080 states and 6806 transitions. [2021-07-09 18:34:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:21,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:21,516 INFO L225 Difference]: With dead ends: 2080 [2021-07-09 18:34:21,516 INFO L226 Difference]: Without dead ends: 2065 [2021-07-09 18:34:21,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3478.1ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:34:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-07-09 18:34:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1529. [2021-07-09 18:34:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-07-09 18:34:21,536 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-07-09 18:34:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:21,537 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-07-09 18:34:21,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-07-09 18:34:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:21,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:21,539 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:21,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:21,740 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-07-09 18:34:21,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:21,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657292977] [2021-07-09 18:34:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:22,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657292977] [2021-07-09 18:34:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657292977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224769134] [2021-07-09 18:34:22,166 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 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 [2021-07-09 18:34:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:34:22,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:22,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:22,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:22,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:22,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:22,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:22,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:22,608 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:34:22,615 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:22,623 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:22,631 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:22,638 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:22,646 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:22,652 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:22,658 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:22,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:22,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:22,663 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:22,739 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:34:22,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:22,741 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:34:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:22,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224769134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:22,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:22,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:22,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522388437] [2021-07-09 18:34:22,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:22,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:22,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:22,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:22,794 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:23,782 INFO L93 Difference]: Finished difference Result 1986 states and 6507 transitions. [2021-07-09 18:34:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:34:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:23,786 INFO L225 Difference]: With dead ends: 1986 [2021-07-09 18:34:23,786 INFO L226 Difference]: Without dead ends: 1965 [2021-07-09 18:34:23,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1235.8ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:34:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-07-09 18:34:23,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1570. [2021-07-09 18:34:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3524537922243467) internal successors, (5260), 1569 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5260 transitions. [2021-07-09 18:34:23,806 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5260 transitions. Word has length 26 [2021-07-09 18:34:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:23,806 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5260 transitions. [2021-07-09 18:34:23,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5260 transitions. [2021-07-09 18:34:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:23,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:23,809 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:24,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-09 18:34:24,010 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:24,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-07-09 18:34:24,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:24,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337497105] [2021-07-09 18:34:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:24,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337497105] [2021-07-09 18:34:24,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337497105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:24,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373667717] [2021-07-09 18:34:24,471 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 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 [2021-07-09 18:34:24,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:24,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:34:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:24,807 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:24,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:24,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:24,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:34:24,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,838 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:24,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:24,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,860 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:24,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:34:24,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,888 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:34:24,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:34:24,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,900 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:24,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:34:24,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,921 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:24,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:34:24,922 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,935 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:24,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:24,936 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,956 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:24,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:34:24,959 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:25,004 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:34:25,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:34:25,006 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:25,015 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:34:25,016 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:25,025 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:25,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:25,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:25,035 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:25,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:25,036 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:25,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:25,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:34:25,055 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:25,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:25,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:34:25,071 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:25,078 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:34:25,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:25,079 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:25,187 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-09 18:34:25,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:25,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:25,200 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:407 [2021-07-09 18:34:25,434 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-09 18:34:25,656 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:34:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373667717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:25,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:25,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:34:25,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493366727] [2021-07-09 18:34:25,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:34:25,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:34:25,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:25,772 INFO L87 Difference]: Start difference. First operand 1570 states and 5260 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,487 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:34:26,882 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-09 18:34:27,053 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:34:27,572 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-07-09 18:34:28,341 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-07-09 18:34:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:28,419 INFO L93 Difference]: Finished difference Result 2168 states and 6948 transitions. [2021-07-09 18:34:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:34:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:28,424 INFO L225 Difference]: With dead ends: 2168 [2021-07-09 18:34:28,424 INFO L226 Difference]: Without dead ends: 2143 [2021-07-09 18:34:28,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3121.3ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:34:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-07-09 18:34:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1584. [2021-07-09 18:34:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.360707517372078) internal successors, (5320), 1583 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5320 transitions. [2021-07-09 18:34:28,450 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5320 transitions. Word has length 26 [2021-07-09 18:34:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:28,450 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5320 transitions. [2021-07-09 18:34:28,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5320 transitions. [2021-07-09 18:34:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:28,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:28,454 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:28,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-07-09 18:34:28,669 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-07-09 18:34:28,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:28,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86555997] [2021-07-09 18:34:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:28,868 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-07-09 18:34:28,988 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-07-09 18:34:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:29,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:29,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86555997] [2021-07-09 18:34:29,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86555997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:29,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015923806] [2021-07-09 18:34:29,177 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 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 [2021-07-09 18:34:29,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:29,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:34:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,549 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:29,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:29,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,561 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:29,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:29,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,571 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:29,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:29,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:29,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:34:29,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,596 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:29,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:34:29,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,607 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:29,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:34:29,608 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:29,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:29,622 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,632 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:29,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:29,633 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,642 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:29,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:29,642 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,651 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:29,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:29,652 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:29,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:34:29,667 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:29,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:29,681 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,694 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:29,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:29,696 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:29,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:34:29,715 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,725 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:29,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:29,726 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:29,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:34:29,733 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:29,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:29,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:29,823 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-09 18:34:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:30,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015923806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:30,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:30,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:34:30,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932118611] [2021-07-09 18:34:30,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:30,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:30,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:30,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:30,042 INFO L87 Difference]: Start difference. First operand 1584 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:30,764 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-09 18:34:30,953 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-07-09 18:34:31,418 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-09 18:34:31,668 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 18:34:31,996 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-09 18:34:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:32,052 INFO L93 Difference]: Finished difference Result 2090 states and 6847 transitions. [2021-07-09 18:34:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:32,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:32,056 INFO L225 Difference]: With dead ends: 2090 [2021-07-09 18:34:32,056 INFO L226 Difference]: Without dead ends: 2061 [2021-07-09 18:34:32,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2334.8ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:34:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-07-09 18:34:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1587. [2021-07-09 18:34:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.3612862547288778) internal successors, (5331), 1586 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5331 transitions. [2021-07-09 18:34:32,088 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5331 transitions. Word has length 26 [2021-07-09 18:34:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:32,088 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5331 transitions. [2021-07-09 18:34:32,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5331 transitions. [2021-07-09 18:34:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:32,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:32,091 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:32,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:32,291 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:32,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-07-09 18:34:32,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:32,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057999755] [2021-07-09 18:34:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:32,519 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-07-09 18:34:32,665 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-07-09 18:34:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:32,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:32,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057999755] [2021-07-09 18:34:32,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057999755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:32,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216004291] [2021-07-09 18:34:32,988 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 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 [2021-07-09 18:34:33,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:33,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:33,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:33,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:33,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:33,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:33,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:33,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:33,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:33,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:33,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:33,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:33,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:33,503 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-09 18:34:33,503 INFO L628 ElimStorePlain]: treesize reduction 121, result has 46.0 percent of original size [2021-07-09 18:34:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:33,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:33,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:33,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:33,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:33,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:33,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:33,588 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-07-09 18:34:33,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:33,590 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-07-09 18:34:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:33,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216004291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:33,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:33,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:34:33,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065197358] [2021-07-09 18:34:33,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:33,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:33,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:33,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:33,656 INFO L87 Difference]: Start difference. First operand 1587 states and 5331 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) [2021-07-09 18:34:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:33,941 INFO L93 Difference]: Finished difference Result 1662 states and 5522 transitions. [2021-07-09 18:34:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:34:33,941 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 26 [2021-07-09 18:34:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:33,944 INFO L225 Difference]: With dead ends: 1662 [2021-07-09 18:34:33,944 INFO L226 Difference]: Without dead ends: 1647 [2021-07-09 18:34:33,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 958.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-09 18:34:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1593. [2021-07-09 18:34:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.363065326633166) internal successors, (5354), 1592 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5354 transitions. [2021-07-09 18:34:33,964 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5354 transitions. Word has length 26 [2021-07-09 18:34:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:33,964 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5354 transitions. [2021-07-09 18:34:33,964 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) [2021-07-09 18:34:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5354 transitions. [2021-07-09 18:34:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:33,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:33,966 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:34,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:34,167 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-07-09 18:34:34,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:34,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158132607] [2021-07-09 18:34:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:34,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:34,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158132607] [2021-07-09 18:34:34,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158132607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:34,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073520367] [2021-07-09 18:34:34,593 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 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 [2021-07-09 18:34:34,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:34,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:34,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:34:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:34,981 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_115, v_prenex_117], 3=[A, v_prenex_119]} [2021-07-09 18:34:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:34,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:34,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:34,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:35,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,150 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 18:34:35,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,177 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:35,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:35,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:34:35,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,320 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 18:34:35,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,336 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:34:35,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 18:34:35,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:34:35,353 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,471 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-09 18:34:35,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:34:35,489 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,502 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:34:35,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-09 18:34:35,504 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,604 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-09 18:34:35,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:35,616 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:194 [2021-07-09 18:34:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:35,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073520367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:35,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:35,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:34:35,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889869938] [2021-07-09 18:34:35,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:34:35,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:35,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:34:35,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:35,849 INFO L87 Difference]: Start difference. First operand 1593 states and 5354 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:37,019 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-07-09 18:34:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:37,084 INFO L93 Difference]: Finished difference Result 2262 states and 7355 transitions. [2021-07-09 18:34:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:34:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:37,088 INFO L225 Difference]: With dead ends: 2262 [2021-07-09 18:34:37,088 INFO L226 Difference]: Without dead ends: 2212 [2021-07-09 18:34:37,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1635.8ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:34:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-07-09 18:34:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1600. [2021-07-09 18:34:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.367104440275172) internal successors, (5384), 1599 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5384 transitions. [2021-07-09 18:34:37,114 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5384 transitions. Word has length 26 [2021-07-09 18:34:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:37,114 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5384 transitions. [2021-07-09 18:34:37,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5384 transitions. [2021-07-09 18:34:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:37,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:37,116 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:37,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-09 18:34:37,317 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-07-09 18:34:37,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:37,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452900079] [2021-07-09 18:34:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:37,538 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-07-09 18:34:37,661 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-07-09 18:34:37,779 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-09 18:34:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:37,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:37,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452900079] [2021-07-09 18:34:37,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452900079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:37,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546546326] [2021-07-09 18:34:37,926 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 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 [2021-07-09 18:34:37,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:37,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:34:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:38,337 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:34:38,532 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-09 18:34:38,609 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_129], 2=[A, v_prenex_128]} [2021-07-09 18:34:38,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:38,614 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:38,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:38,725 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:34:38,725 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:34:38,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:38,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:38,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:38,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:38,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:38,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:38,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:38,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:38,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:38,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:38,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:38,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:38,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:38,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:38,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:38,825 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:34:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:38,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546546326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:38,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:38,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:38,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098821944] [2021-07-09 18:34:38,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:38,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:38,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:38,894 INFO L87 Difference]: Start difference. First operand 1600 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:39,792 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:34:40,170 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-07-09 18:34:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:40,264 INFO L93 Difference]: Finished difference Result 1991 states and 6587 transitions. [2021-07-09 18:34:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:40,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:40,267 INFO L225 Difference]: With dead ends: 1991 [2021-07-09 18:34:40,267 INFO L226 Difference]: Without dead ends: 1976 [2021-07-09 18:34:40,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2114.1ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:34:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-07-09 18:34:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1611. [2021-07-09 18:34:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3670807453416147) internal successors, (5421), 1610 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5421 transitions. [2021-07-09 18:34:40,288 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5421 transitions. Word has length 26 [2021-07-09 18:34:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:40,288 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5421 transitions. [2021-07-09 18:34:40,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5421 transitions. [2021-07-09 18:34:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:40,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:40,290 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:40,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-07-09 18:34:40,491 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:40,491 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 25 times [2021-07-09 18:34:40,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:40,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802521538] [2021-07-09 18:34:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:40,733 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-09 18:34:40,876 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-07-09 18:34:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:41,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:41,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802521538] [2021-07-09 18:34:41,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802521538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:41,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955616722] [2021-07-09 18:34:41,094 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 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 [2021-07-09 18:34:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:41,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:34:41,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:41,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,365 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:41,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:41,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:41,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:34:41,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,392 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:41,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:41,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,407 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:41,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:34:41,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:41,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-09 18:34:41,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,437 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:41,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:41,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,449 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:41,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:41,450 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:41,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:34:41,468 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,487 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:41,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:41,488 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-09 18:34:41,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:41,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:41,532 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,548 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:41,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:34:41,549 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,563 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:41,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:34:41,565 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,577 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:41,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:41,578 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:41,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:34:41,593 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,603 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:41,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-09 18:34:41,605 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:41,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:41,681 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-09 18:34:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:41,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955616722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:41,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:41,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:34:41,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675871712] [2021-07-09 18:34:41,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:41,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:41,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:41,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:41,884 INFO L87 Difference]: Start difference. First operand 1611 states and 5421 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:42,549 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:34:42,737 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-07-09 18:34:43,197 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-09 18:34:43,362 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-07-09 18:34:43,566 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 18:34:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:43,668 INFO L93 Difference]: Finished difference Result 2102 states and 6930 transitions. [2021-07-09 18:34:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:34:43,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:43,672 INFO L225 Difference]: With dead ends: 2102 [2021-07-09 18:34:43,672 INFO L226 Difference]: Without dead ends: 2083 [2021-07-09 18:34:43,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2171.1ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:34:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-07-09 18:34:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1612. [2021-07-09 18:34:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3699565487274983) internal successors, (5429), 1611 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5429 transitions. [2021-07-09 18:34:43,694 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5429 transitions. Word has length 26 [2021-07-09 18:34:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:43,695 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5429 transitions. [2021-07-09 18:34:43,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5429 transitions. [2021-07-09 18:34:43,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:43,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:43,697 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:43,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:43,898 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:43,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 26 times [2021-07-09 18:34:43,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:43,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423752378] [2021-07-09 18:34:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:44,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423752378] [2021-07-09 18:34:44,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423752378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603925900] [2021-07-09 18:34:44,249 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 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 [2021-07-09 18:34:44,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:44,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,477 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:44,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:44,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,488 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:44,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:44,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,497 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:44,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:44,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,509 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:44,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:44,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,523 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:44,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:44,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:44,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,546 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:44,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:44,547 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:34:44,560 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:34:44,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,584 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:44,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:34:44,585 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,594 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:44,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:34:44,594 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:44,607 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,618 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:44,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:34:44,620 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:34:44,634 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,642 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:44,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:44,643 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,648 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:44,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:44,649 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:44,723 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:34:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:44,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603925900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:44,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:44,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:34:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588987356] [2021-07-09 18:34:44,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:44,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:44,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:44,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:44,940 INFO L87 Difference]: Start difference. First operand 1612 states and 5429 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:45,526 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:34:46,207 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-09 18:34:46,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:46,263 INFO L93 Difference]: Finished difference Result 2116 states and 6975 transitions. [2021-07-09 18:34:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:46,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:46,268 INFO L225 Difference]: With dead ends: 2116 [2021-07-09 18:34:46,268 INFO L226 Difference]: Without dead ends: 2091 [2021-07-09 18:34:46,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1582.7ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:34:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-07-09 18:34:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1618. [2021-07-09 18:34:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.368583797155226) internal successors, (5447), 1617 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5447 transitions. [2021-07-09 18:34:46,292 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5447 transitions. Word has length 26 [2021-07-09 18:34:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:46,292 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5447 transitions. [2021-07-09 18:34:46,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5447 transitions. [2021-07-09 18:34:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:46,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:46,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:46,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-07-09 18:34:46,495 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:46,495 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-07-09 18:34:46,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:46,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718184446] [2021-07-09 18:34:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:47,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:47,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718184446] [2021-07-09 18:34:47,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718184446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:47,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324925643] [2021-07-09 18:34:47,032 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 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 [2021-07-09 18:34:47,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:47,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:47,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:47,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:47,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:34:47,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:34:47,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:34:47,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:34:47,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:34:47,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-09 18:34:47,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:34:47,712 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:34:47,724 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:34:47,735 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-09 18:34:47,746 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:34:47,758 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:34:47,770 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-09 18:34:47,780 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:34:47,791 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:34:47,800 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:47,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:47,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:34:47,805 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:47,839 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-09 18:34:47,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:47,840 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-09 18:34:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:47,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324925643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:47,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:47,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:34:47,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150385641] [2021-07-09 18:34:47,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:47,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:47,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:47,871 INFO L87 Difference]: Start difference. First operand 1618 states and 5447 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:49,509 INFO L93 Difference]: Finished difference Result 2097 states and 6880 transitions. [2021-07-09 18:34:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:34:49,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:49,513 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 18:34:49,513 INFO L226 Difference]: Without dead ends: 2071 [2021-07-09 18:34:49,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1935.9ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-07-09 18:34:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1622. [2021-07-09 18:34:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-07-09 18:34:49,537 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-07-09 18:34:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:49,537 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-07-09 18:34:49,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-07-09 18:34:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:49,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:49,539 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:49,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-07-09 18:34:49,740 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-07-09 18:34:49,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:49,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151386359] [2021-07-09 18:34:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:50,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:50,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151386359] [2021-07-09 18:34:50,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151386359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:50,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324130700] [2021-07-09 18:34:50,328 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 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 [2021-07-09 18:34:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:34:50,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:50,633 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-09 18:34:50,684 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_132, v_prenex_134], 6=[A, v_prenex_130]} [2021-07-09 18:34:50,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:50,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:50,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:34:50,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:50,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:50,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:50,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:34:50,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:50,815 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-09 18:34:50,816 INFO L628 ElimStorePlain]: treesize reduction 180, result has 40.2 percent of original size [2021-07-09 18:34:50,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:50,820 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:34:50,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:50,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:50,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:50,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:50,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:34:50,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:50,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:50,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:50,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:50,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:34:50,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:50,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:50,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:34:50,930 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:43 [2021-07-09 18:34:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:50,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324130700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:50,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:50,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:34:50,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881059366] [2021-07-09 18:34:50,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:50,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:50,980 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:52,706 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-09 18:34:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:52,835 INFO L93 Difference]: Finished difference Result 2270 states and 7447 transitions. [2021-07-09 18:34:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:34:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:52,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:52,839 INFO L225 Difference]: With dead ends: 2270 [2021-07-09 18:34:52,839 INFO L226 Difference]: Without dead ends: 2255 [2021-07-09 18:34:52,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2198.0ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:34:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-07-09 18:34:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1622. [2021-07-09 18:34:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-07-09 18:34:52,865 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-07-09 18:34:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:52,865 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-07-09 18:34:52,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-07-09 18:34:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:52,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:52,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:53,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:53,070 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:53,070 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 27 times [2021-07-09 18:34:53,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:53,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286575174] [2021-07-09 18:34:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:53,324 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-07-09 18:34:53,461 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-09 18:34:53,605 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-07-09 18:34:53,763 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-09 18:34:53,883 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-07-09 18:34:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:53,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286575174] [2021-07-09 18:34:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286575174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394802599] [2021-07-09 18:34:53,917 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 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 [2021-07-09 18:34:53,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:53,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:53,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:53,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:54,294 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-09 18:34:54,475 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:34:54,777 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-07-09 18:34:54,852 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_143, v_prenex_145], 6=[A, v_prenex_147]} [2021-07-09 18:34:54,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:54,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:54,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,094 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-09 18:34:55,094 INFO L628 ElimStorePlain]: treesize reduction 147, result has 51.5 percent of original size [2021-07-09 18:34:55,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:55,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:55,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:55,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:55,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:55,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:55,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:55,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:55,182 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:55,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:34:55,236 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:55,284 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:341, output treesize:61 [2021-07-09 18:34:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:55,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394802599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:55,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:55,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:55,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147084614] [2021-07-09 18:34:55,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:55,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:55,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:55,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:55,366 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:55,790 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-09 18:34:56,098 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-09 18:34:56,262 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-07-09 18:34:56,726 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2021-07-09 18:34:57,330 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-07-09 18:34:57,846 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-07-09 18:34:58,499 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 87 [2021-07-09 18:34:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:58,609 INFO L93 Difference]: Finished difference Result 2122 states and 6912 transitions. [2021-07-09 18:34:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:58,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:58,613 INFO L225 Difference]: With dead ends: 2122 [2021-07-09 18:34:58,613 INFO L226 Difference]: Without dead ends: 2107 [2021-07-09 18:34:58,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4253.2ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:34:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-07-09 18:34:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1633. [2021-07-09 18:34:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3670343137254903) internal successors, (5495), 1632 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5495 transitions. [2021-07-09 18:34:58,636 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5495 transitions. Word has length 26 [2021-07-09 18:34:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:58,636 INFO L482 AbstractCegarLoop]: Abstraction has 1633 states and 5495 transitions. [2021-07-09 18:34:58,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5495 transitions. [2021-07-09 18:34:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:58,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:58,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:58,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-07-09 18:34:58,839 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-07-09 18:34:58,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:58,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867097995] [2021-07-09 18:34:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:59,366 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-07-09 18:34:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:59,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:59,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867097995] [2021-07-09 18:34:59,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867097995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:59,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218775781] [2021-07-09 18:34:59,525 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 [2021-07-09 18:34:59,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:59,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:34:59,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:59,932 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-07-09 18:35:00,320 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_158], 6=[v_prenex_160, v_prenex_162]} [2021-07-09 18:35:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:00,346 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:35:00,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-09 18:35:00,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:00,374 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:35:00,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:35:00,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:00,563 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-09 18:35:00,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:00,585 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:35:00,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-09 18:35:00,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:00,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-09 18:35:00,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:00,787 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 18:35:00,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:00,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:00,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:00,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:00,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-09 18:35:00,817 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:00,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:00,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:00,837 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:35:00,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:35:00,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:00,996 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-09 18:35:00,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:01,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:01,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:01,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:01,023 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:35:01,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:35:01,024 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:01,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:01,044 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:35:01,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:35:01,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:01,184 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-09 18:35:01,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:01,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:01,203 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:433, output treesize:343 [2021-07-09 18:35:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218775781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:01,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:01,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578449228] [2021-07-09 18:35:01,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:35:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:35:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:35:01,367 INFO L87 Difference]: Start difference. First operand 1633 states and 5495 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:02,042 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-07-09 18:35:03,518 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-07-09 18:35:03,750 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-09 18:35:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:04,380 INFO L93 Difference]: Finished difference Result 2550 states and 8113 transitions. [2021-07-09 18:35:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:35:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:04,384 INFO L225 Difference]: With dead ends: 2550 [2021-07-09 18:35:04,385 INFO L226 Difference]: Without dead ends: 2506 [2021-07-09 18:35:04,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3516.5ms TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:35:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-07-09 18:35:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1640. [2021-07-09 18:35:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.36790726052471) internal successors, (5520), 1639 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5520 transitions. [2021-07-09 18:35:04,412 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5520 transitions. Word has length 26 [2021-07-09 18:35:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:04,413 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5520 transitions. [2021-07-09 18:35:04,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5520 transitions. [2021-07-09 18:35:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:04,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:04,415 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:04,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:04,615 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-07-09 18:35:04,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:04,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497925433] [2021-07-09 18:35:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:05,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497925433] [2021-07-09 18:35:05,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497925433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295010531] [2021-07-09 18:35:05,087 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 [2021-07-09 18:35:05,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:35:05,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:35:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:05,450 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:35:05,688 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 18:35:05,986 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:35:06,397 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:35:06,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-07-09 18:35:06,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:06,458 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-07-09 18:35:06,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 38 [2021-07-09 18:35:06,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,579 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 175 DAG size of output: 169 [2021-07-09 18:35:07,580 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.5 percent of original size [2021-07-09 18:35:07,655 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-09 18:35:07,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-07-09 18:35:07,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,713 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-09 18:35:07,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-07-09 18:35:07,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:08,262 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-09 18:35:08,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:08,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:08,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-07-09 18:35:08,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:08,402 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-07-09 18:35:08,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:35:08,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,129 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2021-07-09 18:35:10,130 INFO L628 ElimStorePlain]: treesize reduction 92, result has 90.6 percent of original size [2021-07-09 18:35:10,202 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:35:10,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2021-07-09 18:35:10,212 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,280 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-07-09 18:35:10,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-07-09 18:35:10,294 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,406 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 181 DAG size of output: 172 [2021-07-09 18:35:11,407 INFO L628 ElimStorePlain]: treesize reduction 83, result has 91.5 percent of original size [2021-07-09 18:35:11,471 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-09 18:35:11,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-07-09 18:35:11,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-07-09 18:35:11,557 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:12,073 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-07-09 18:35:12,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:12,143 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:35:12,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-07-09 18:35:12,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:12,210 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:35:12,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-07-09 18:35:12,230 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:13,261 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2021-07-09 18:35:13,262 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.8 percent of original size [2021-07-09 18:35:13,325 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-07-09 18:35:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-07-09 18:35:13,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:13,389 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-07-09 18:35:13,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-07-09 18:35:13,393 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:13,878 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-09 18:35:13,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:13,932 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-07-09 18:35:13,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-07-09 18:35:13,936 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:13,993 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-07-09 18:35:13,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-07-09 18:35:14,012 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:14,877 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-07-09 18:35:14,878 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-07-09 18:35:15,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-09 18:35:15,004 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2294 [2021-07-09 18:35:15,701 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 69 [2021-07-09 18:35:15,878 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-09 18:35:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:15,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295010531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:15,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:15,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:35:15,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714937164] [2021-07-09 18:35:15,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:35:15,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:15,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:35:15,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:35:15,908 INFO L87 Difference]: Start difference. First operand 1640 states and 5520 transitions. Second operand has 23 states, 23 states have (on average 2.0) 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) [2021-07-09 18:35:18,603 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-09 18:35:19,020 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 18:35:19,770 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-07-09 18:35:20,201 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-07-09 18:35:20,591 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-09 18:35:20,769 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 33 [2021-07-09 18:35:21,427 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 90 [2021-07-09 18:35:21,942 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 92 [2021-07-09 18:35:22,903 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 96 [2021-07-09 18:35:23,327 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-07-09 18:35:23,575 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-07-09 18:35:23,733 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2021-07-09 18:35:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:23,879 INFO L93 Difference]: Finished difference Result 3086 states and 9767 transitions. [2021-07-09 18:35:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:35:23,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) 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 26 [2021-07-09 18:35:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:23,884 INFO L225 Difference]: With dead ends: 3086 [2021-07-09 18:35:23,884 INFO L226 Difference]: Without dead ends: 3056 [2021-07-09 18:35:23,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 8498.5ms TimeCoverageRelationStatistics Valid=696, Invalid=4134, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:35:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-07-09 18:35:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1671. [2021-07-09 18:35:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3748502994011975) internal successors, (5636), 1670 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5636 transitions. [2021-07-09 18:35:23,918 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5636 transitions. Word has length 26 [2021-07-09 18:35:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:23,918 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5636 transitions. [2021-07-09 18:35:23,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) 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) [2021-07-09 18:35:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5636 transitions. [2021-07-09 18:35:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:23,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:23,921 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:24,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:24,122 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:24,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 28 times [2021-07-09 18:35:24,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:24,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286425965] [2021-07-09 18:35:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:24,380 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-09 18:35:24,492 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-07-09 18:35:24,625 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-09 18:35:24,747 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-07-09 18:35:24,865 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-07-09 18:35:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:24,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286425965] [2021-07-09 18:35:24,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286425965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882584223] [2021-07-09 18:35:24,915 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 [2021-07-09 18:35:24,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:24,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:24,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:35:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:25,279 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:35:25,567 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-09 18:35:25,640 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_185], 2=[v_prenex_186, v_prenex_187], 3=[A]} [2021-07-09 18:35:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:25,645 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:25,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:25,801 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:35:25,802 INFO L628 ElimStorePlain]: treesize reduction 94, result has 60.3 percent of original size [2021-07-09 18:35:25,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:25,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:25,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:25,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:25,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:25,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:25,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:25,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:25,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:25,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:25,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:25,908 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:35:25,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:25,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:25,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:25,949 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:251, output treesize:56 [2021-07-09 18:35:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:26,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882584223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:26,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:26,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:35:26,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620383696] [2021-07-09 18:35:26,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:35:26,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:26,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:35:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:26,007 INFO L87 Difference]: Start difference. First operand 1671 states and 5636 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:26,370 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-09 18:35:26,615 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-09 18:35:27,128 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-07-09 18:35:27,427 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:35:27,569 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 18:35:27,790 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-07-09 18:35:28,045 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-07-09 18:35:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:28,169 INFO L93 Difference]: Finished difference Result 2244 states and 7296 transitions. [2021-07-09 18:35:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:35:28,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:28,173 INFO L225 Difference]: With dead ends: 2244 [2021-07-09 18:35:28,173 INFO L226 Difference]: Without dead ends: 2229 [2021-07-09 18:35:28,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2963.4ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:35:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-07-09 18:35:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1676. [2021-07-09 18:35:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3761194029850747) internal successors, (5655), 1675 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5655 transitions. [2021-07-09 18:35:28,196 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5655 transitions. Word has length 26 [2021-07-09 18:35:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:28,196 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5655 transitions. [2021-07-09 18:35:28,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5655 transitions. [2021-07-09 18:35:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:28,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:28,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:28,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:28,399 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash 318878074, now seen corresponding path program 29 times [2021-07-09 18:35:28,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:28,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507144400] [2021-07-09 18:35:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:28,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:28,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507144400] [2021-07-09 18:35:28,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507144400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:28,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119579169] [2021-07-09 18:35:28,792 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 [2021-07-09 18:35:28,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:35:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:29,194 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 18:35:29,401 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-09 18:35:29,453 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_195, v_prenex_197, v_prenex_199, v_prenex_200, v_prenex_201], 3=[v_prenex_196, v_prenex_198]} [2021-07-09 18:35:29,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:29,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:29,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:35:29,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,589 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:35:29,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:29,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:35:29,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,739 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:35:29,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:29,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:35:29,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,873 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:35:29,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:29,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:35:29,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,001 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-09 18:35:30,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:30,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:30,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:35:30,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,122 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 18:35:30,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,136 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:30,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:30,137 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,241 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 18:35:30,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,253 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:35:30,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:35:30,255 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:30,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:35:30,366 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:30,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:30,466 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-07-09 18:35:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:30,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119579169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:30,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:30,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:30,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882714750] [2021-07-09 18:35:30,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:30,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:30,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:30,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:30,662 INFO L87 Difference]: Start difference. First operand 1676 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:31,004 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-09 18:35:32,068 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-09 18:35:32,591 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2021-07-09 18:35:33,022 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-07-09 18:35:33,486 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-07-09 18:35:33,997 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 110 [2021-07-09 18:35:34,504 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-07-09 18:35:34,759 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-09 18:35:35,087 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-09 18:35:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:35,239 INFO L93 Difference]: Finished difference Result 2686 states and 8637 transitions. [2021-07-09 18:35:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:35:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:35,244 INFO L225 Difference]: With dead ends: 2686 [2021-07-09 18:35:35,244 INFO L226 Difference]: Without dead ends: 2652 [2021-07-09 18:35:35,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 4725.7ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:35:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-07-09 18:35:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1683. [2021-07-09 18:35:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.381688466111772) internal successors, (5688), 1682 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5688 transitions. [2021-07-09 18:35:35,272 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5688 transitions. Word has length 26 [2021-07-09 18:35:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:35,273 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5688 transitions. [2021-07-09 18:35:35,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5688 transitions. [2021-07-09 18:35:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:35,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:35,275 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:35,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-07-09 18:35:35,476 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-07-09 18:35:35,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:35,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703137780] [2021-07-09 18:35:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:35,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:35,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703137780] [2021-07-09 18:35:35,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703137780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:35,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380690898] [2021-07-09 18:35:35,912 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 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 [2021-07-09 18:35:35,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:35,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:35:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:35:36,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:36,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:35:36,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:35:36,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:35:36,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:35:36,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:35:36,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:35:36,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:35:36,680 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:35:36,690 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:35:36,699 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:35:36,708 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-09 18:35:36,717 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:35:36,727 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:35:36,735 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:36,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:35:36,741 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,800 INFO L628 ElimStorePlain]: treesize reduction 237, result has 13.5 percent of original size [2021-07-09 18:35:36,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:35:36,801 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-07-09 18:35:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380690898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:36,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:36,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:35:36,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867800036] [2021-07-09 18:35:36,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:36,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:36,839 INFO L87 Difference]: Start difference. First operand 1683 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:37,528 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-07-09 18:35:37,653 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-07-09 18:35:38,267 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-07-09 18:35:38,932 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 18:35:39,054 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-09 18:35:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:39,651 INFO L93 Difference]: Finished difference Result 3384 states and 10825 transitions. [2021-07-09 18:35:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:35:39,651 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:39,658 INFO L225 Difference]: With dead ends: 3384 [2021-07-09 18:35:39,658 INFO L226 Difference]: Without dead ends: 3348 [2021-07-09 18:35:39,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2913.5ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:35:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-07-09 18:35:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 1796. [2021-07-09 18:35:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.403899721448468) internal successors, (6110), 1795 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6110 transitions. [2021-07-09 18:35:39,696 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6110 transitions. Word has length 26 [2021-07-09 18:35:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:39,696 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 6110 transitions. [2021-07-09 18:35:39,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6110 transitions. [2021-07-09 18:35:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:39,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:39,699 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:39,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:39,900 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-07-09 18:35:39,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:39,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963810126] [2021-07-09 18:35:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:40,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:40,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963810126] [2021-07-09 18:35:40,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963810126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:40,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142711727] [2021-07-09 18:35:40,305 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 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 [2021-07-09 18:35:40,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:40,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:40,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:35:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,821 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:35:40,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 37 [2021-07-09 18:35:40,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,859 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-09 18:35:40,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-07-09 18:35:40,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,891 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:35:40,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-09 18:35:40,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,924 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:35:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:35:40,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,954 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:35:40,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-09 18:35:40,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,974 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:40,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:35:40,975 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,003 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:35:41,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-07-09 18:35:41,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,023 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:41,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:35:41,024 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,043 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:41,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:35:41,044 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,064 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:41,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:35:41,065 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,093 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-07-09 18:35:41,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-09 18:35:41,095 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,113 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:41,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-07-09 18:35:41,114 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,131 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:41,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:35:41,132 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,149 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:41,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:35:41,150 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:41,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-09 18:35:41,195 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,206 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:35:41,207 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,391 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-07-09 18:35:41,392 INFO L628 ElimStorePlain]: treesize reduction 116, result has 51.7 percent of original size [2021-07-09 18:35:41,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:41,394 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-09 18:35:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:41,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142711727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:41,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:41,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:35:41,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113828469] [2021-07-09 18:35:41,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:41,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:41,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:41,534 INFO L87 Difference]: Start difference. First operand 1796 states and 6110 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:42,886 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-07-09 18:35:43,421 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-09 18:35:43,668 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-09 18:35:43,901 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-09 18:35:44,428 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-07-09 18:35:44,696 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-09 18:35:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:44,973 INFO L93 Difference]: Finished difference Result 3832 states and 12118 transitions. [2021-07-09 18:35:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:35:44,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:44,981 INFO L225 Difference]: With dead ends: 3832 [2021-07-09 18:35:44,981 INFO L226 Difference]: Without dead ends: 3775 [2021-07-09 18:35:44,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3382.8ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:35:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-07-09 18:35:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1819. [2021-07-09 18:35:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.407590759075908) internal successors, (6195), 1818 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6195 transitions. [2021-07-09 18:35:45,019 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6195 transitions. Word has length 26 [2021-07-09 18:35:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:45,019 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 6195 transitions. [2021-07-09 18:35:45,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6195 transitions. [2021-07-09 18:35:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:45,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:45,022 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:45,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-07-09 18:35:45,222 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 30 times [2021-07-09 18:35:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:45,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474883316] [2021-07-09 18:35:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:45,419 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-09 18:35:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:45,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:45,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474883316] [2021-07-09 18:35:45,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474883316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:45,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828582346] [2021-07-09 18:35:45,789 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 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 [2021-07-09 18:35:45,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:35:45,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:45,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:35:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:46,249 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 18:35:46,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:35:46,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,915 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-09 18:35:46,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,938 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:46,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:35:46,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,088 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-09 18:35:47,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,114 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:47,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:35:47,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,264 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-09 18:35:47,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,289 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:47,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:35:47,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,437 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 18:35:47,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,462 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:47,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:35:47,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,607 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 18:35:47,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,627 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:47,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:35:47,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,770 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:35:47,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:35:47,791 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,935 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-09 18:35:47,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:35:47,959 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:48,098 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:35:48,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:48,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:48,121 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:373, output treesize:497 [2021-07-09 18:35:48,459 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-09 18:35:48,728 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-09 18:35:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:48,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828582346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:48,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:48,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646456867] [2021-07-09 18:35:48,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:48,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:48,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:48,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:48,838 INFO L87 Difference]: Start difference. First operand 1819 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:49,085 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-07-09 18:35:49,305 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:35:49,903 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 18:35:50,096 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-07-09 18:35:50,443 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-07-09 18:35:50,779 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-09 18:35:51,391 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-07-09 18:35:51,903 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-07-09 18:35:52,321 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-07-09 18:35:52,624 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-07-09 18:35:53,204 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-07-09 18:35:53,435 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-09 18:35:53,684 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-09 18:35:54,216 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-07-09 18:35:54,886 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-07-09 18:35:55,353 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-07-09 18:35:56,254 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-07-09 18:35:56,666 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-07-09 18:35:57,108 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-07-09 18:35:57,534 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-07-09 18:35:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:57,601 INFO L93 Difference]: Finished difference Result 2671 states and 8693 transitions. [2021-07-09 18:35:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:35:57,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:57,606 INFO L225 Difference]: With dead ends: 2671 [2021-07-09 18:35:57,606 INFO L226 Difference]: Without dead ends: 2637 [2021-07-09 18:35:57,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 9264.4ms TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:35:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-07-09 18:35:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1837. [2021-07-09 18:35:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.411764705882353) internal successors, (6264), 1836 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6264 transitions. [2021-07-09 18:35:57,636 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6264 transitions. Word has length 26 [2021-07-09 18:35:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:57,636 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6264 transitions. [2021-07-09 18:35:57,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6264 transitions. [2021-07-09 18:35:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:57,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:57,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:57,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-07-09 18:35:57,839 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash 461518918, now seen corresponding path program 31 times [2021-07-09 18:35:57,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:57,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416311054] [2021-07-09 18:35:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:58,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416311054] [2021-07-09 18:35:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416311054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349445450] [2021-07-09 18:35:58,235 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 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 [2021-07-09 18:35:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:58,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:58,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:58,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:35:58,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,486 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:58,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:35:58,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:58,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-09 18:35:58,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,515 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:58,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:35:58,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,530 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:58,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:35:58,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,541 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:58,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:35:58,542 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,552 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:58,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:35:58,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,563 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:58,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-07-09 18:35:58,564 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,574 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:58,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-09 18:35:58,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,585 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:58,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:35:58,586 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,596 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:58,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-07-09 18:35:58,597 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:58,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:35:58,612 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:35:58,626 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:58,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-09 18:35:58,641 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,653 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-09 18:35:58,654 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:58,661 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:58,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:35:58,661 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:58,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:58,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:58,742 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-07-09 18:35:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:58,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349445450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:58,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:58,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:35:58,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491229010] [2021-07-09 18:35:58,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:58,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:58,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:58,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:58,958 INFO L87 Difference]: Start difference. First operand 1837 states and 6264 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:59,841 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-09 18:36:00,737 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-09 18:36:01,107 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:36:01,300 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-07-09 18:36:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:01,455 INFO L93 Difference]: Finished difference Result 2618 states and 8665 transitions. [2021-07-09 18:36:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:36:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:01,460 INFO L225 Difference]: With dead ends: 2618 [2021-07-09 18:36:01,460 INFO L226 Difference]: Without dead ends: 2584 [2021-07-09 18:36:01,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2553.3ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:36:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-07-09 18:36:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1832. [2021-07-09 18:36:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.409612233752048) internal successors, (6243), 1831 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6243 transitions. [2021-07-09 18:36:01,491 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6243 transitions. Word has length 26 [2021-07-09 18:36:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:01,491 INFO L482 AbstractCegarLoop]: Abstraction has 1832 states and 6243 transitions. [2021-07-09 18:36:01,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6243 transitions. [2021-07-09 18:36:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:01,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:01,493 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:01,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:01,694 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 32 times [2021-07-09 18:36:01,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:01,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678301066] [2021-07-09 18:36:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:01,907 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:36:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:02,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:02,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678301066] [2021-07-09 18:36:02,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678301066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:02,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535409314] [2021-07-09 18:36:02,171 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 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 [2021-07-09 18:36:02,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:02,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:02,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:36:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:02,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:02,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:36:02,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,620 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:02,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:36:02,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,774 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:36:02,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:02,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:02,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:36:02,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:36:02,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,955 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:36:02,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:02,975 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:02,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:02,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,994 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:02,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:36:02,998 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:03,160 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:36:03,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:03,180 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:03,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:36:03,182 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:03,196 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:03,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:36:03,198 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:03,328 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 18:36:03,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:03,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:03,360 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:430 [2021-07-09 18:36:03,641 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-09 18:36:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:03,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535409314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:03,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:03,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:36:03,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976345122] [2021-07-09 18:36:03,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:36:03,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:03,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:36:03,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:36:03,901 INFO L87 Difference]: Start difference. First operand 1832 states and 6243 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:04,080 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 27 [2021-07-09 18:36:04,595 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-09 18:36:04,741 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-07-09 18:36:04,970 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-09 18:36:05,627 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-09 18:36:06,008 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-09 18:36:06,306 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-07-09 18:36:06,702 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-09 18:36:07,109 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-07-09 18:36:07,405 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:36:07,713 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-07-09 18:36:08,068 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-07-09 18:36:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:08,446 INFO L93 Difference]: Finished difference Result 2647 states and 8625 transitions. [2021-07-09 18:36:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:36:08,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:08,451 INFO L225 Difference]: With dead ends: 2647 [2021-07-09 18:36:08,451 INFO L226 Difference]: Without dead ends: 2578 [2021-07-09 18:36:08,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4817.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:36:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-07-09 18:36:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1826. [2021-07-09 18:36:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.4076712328767123) internal successors, (6219), 1825 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6219 transitions. [2021-07-09 18:36:08,479 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6219 transitions. Word has length 26 [2021-07-09 18:36:08,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:08,479 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6219 transitions. [2021-07-09 18:36:08,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6219 transitions. [2021-07-09 18:36:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:08,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:08,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:08,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:08,682 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:08,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-07-09 18:36:08,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:08,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307866297] [2021-07-09 18:36:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:09,011 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-07-09 18:36:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:09,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:09,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307866297] [2021-07-09 18:36:09,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307866297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:09,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421649120] [2021-07-09 18:36:09,339 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 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 [2021-07-09 18:36:09,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:36:09,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:09,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:36:09,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:09,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:36:09,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:36:09,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:36:09,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:36:09,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:36:09,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:36:09,905 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:36:09,912 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:36:09,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:36:09,927 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-07-09 18:36:09,935 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:36:09,942 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:36:09,949 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:36:09,957 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:36:09,964 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:36:09,971 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:09,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:36:09,975 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:10,010 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-07-09 18:36:10,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:36:10,011 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:21 [2021-07-09 18:36:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:10,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421649120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:10,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:10,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:36:10,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716374454] [2021-07-09 18:36:10,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:36:10,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:10,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:36:10,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:36:10,042 INFO L87 Difference]: Start difference. First operand 1826 states and 6219 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:10,597 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-07-09 18:36:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:11,691 INFO L93 Difference]: Finished difference Result 2336 states and 7723 transitions. [2021-07-09 18:36:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:36:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:11,696 INFO L225 Difference]: With dead ends: 2336 [2021-07-09 18:36:11,696 INFO L226 Difference]: Without dead ends: 2314 [2021-07-09 18:36:11,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2006.5ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:36:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-07-09 18:36:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1818. [2021-07-09 18:36:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-07-09 18:36:11,720 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-07-09 18:36:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:11,720 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-07-09 18:36:11,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-07-09 18:36:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:11,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:11,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:11,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-07-09 18:36:11,923 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-07-09 18:36:11,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:11,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828190269] [2021-07-09 18:36:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:12,195 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-07-09 18:36:12,324 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-07-09 18:36:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:12,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:12,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828190269] [2021-07-09 18:36:12,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828190269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:12,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383895134] [2021-07-09 18:36:12,595 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 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 [2021-07-09 18:36:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:12,943 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-09 18:36:12,995 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_263, v_prenex_259], 5=[A, v_prenex_261]} [2021-07-09 18:36:12,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:13,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:13,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:36:13,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:13,100 INFO L628 ElimStorePlain]: treesize reduction 150, result has 45.5 percent of original size [2021-07-09 18:36:13,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:13,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:13,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:36:13,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:13,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:13,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:13,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:36:13,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:13,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:13,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:36:13,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:13,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:13,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:36:13,202 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:41 [2021-07-09 18:36:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:13,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383895134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:13,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:13,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:36:13,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525592922] [2021-07-09 18:36:13,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:13,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:13,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:13,252 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:15,344 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-07-09 18:36:15,922 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 18:36:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:16,095 INFO L93 Difference]: Finished difference Result 2526 states and 8350 transitions. [2021-07-09 18:36:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:36:16,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:16,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:16,099 INFO L225 Difference]: With dead ends: 2526 [2021-07-09 18:36:16,099 INFO L226 Difference]: Without dead ends: 2511 [2021-07-09 18:36:16,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3067.2ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:36:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-07-09 18:36:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1818. [2021-07-09 18:36:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-07-09 18:36:16,125 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-07-09 18:36:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:16,125 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-07-09 18:36:16,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-07-09 18:36:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:16,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:16,127 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:16,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:16,328 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-07-09 18:36:16,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:16,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827136277] [2021-07-09 18:36:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:16,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827136277] [2021-07-09 18:36:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827136277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141192682] [2021-07-09 18:36:16,775 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 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 [2021-07-09 18:36:16,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:16,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:16,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:16,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,045 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:36:17,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:36:17,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,074 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-09 18:36:17,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-07-09 18:36:17,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,101 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-09 18:36:17,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:36:17,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,127 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:36:17,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:36:17,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,146 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:36:17,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:17,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,173 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-09 18:36:17,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-07-09 18:36:17,174 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,202 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-09 18:36:17,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-09 18:36:17,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,225 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:36:17,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:36:17,226 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,243 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:36:17,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:36:17,244 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,270 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-09 18:36:17,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-07-09 18:36:17,271 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:17,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 18:36:17,306 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,324 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:36:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:17,324 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,343 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:36:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:17,344 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,360 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:36:17,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:36:17,361 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,383 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:36:17,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:36:17,384 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,394 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:36:17,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:36:17,394 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,486 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-07-09 18:36:17,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:36:17,487 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-07-09 18:36:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:17,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141192682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:17,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:17,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-07-09 18:36:17,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504969761] [2021-07-09 18:36:17,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:36:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:36:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:36:17,584 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:19,449 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-09 18:36:20,464 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-07-09 18:36:20,896 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-09 18:36:21,383 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-09 18:36:21,644 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-09 18:36:21,991 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-07-09 18:36:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:22,039 INFO L93 Difference]: Finished difference Result 3017 states and 9720 transitions. [2021-07-09 18:36:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:36:22,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:22,044 INFO L225 Difference]: With dead ends: 3017 [2021-07-09 18:36:22,045 INFO L226 Difference]: Without dead ends: 2970 [2021-07-09 18:36:22,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 4040.3ms TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:36:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-07-09 18:36:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1841. [2021-07-09 18:36:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3967391304347827) internal successors, (6250), 1840 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6250 transitions. [2021-07-09 18:36:22,075 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6250 transitions. Word has length 26 [2021-07-09 18:36:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:22,076 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6250 transitions. [2021-07-09 18:36:22,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6250 transitions. [2021-07-09 18:36:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:22,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:22,078 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:22,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-07-09 18:36:22,279 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:22,279 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-07-09 18:36:22,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:22,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487657470] [2021-07-09 18:36:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:22,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:22,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487657470] [2021-07-09 18:36:22,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487657470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:22,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794629561] [2021-07-09 18:36:22,644 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 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 [2021-07-09 18:36:22,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:36:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:22,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:36:22,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:23,106 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-09 18:36:23,334 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_273, v_prenex_265, v_prenex_277, v_prenex_267, v_prenex_269], 6=[v_prenex_271, v_prenex_275]} [2021-07-09 18:36:23,415 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:36:23,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-07-09 18:36:23,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:23,496 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-07-09 18:36:23,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-07-09 18:36:23,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,561 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2021-07-09 18:36:24,561 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.5 percent of original size [2021-07-09 18:36:24,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-07-09 18:36:24,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,672 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:36:24,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:36:24,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:26,247 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-07-09 18:36:26,248 INFO L628 ElimStorePlain]: treesize reduction 45, result has 95.3 percent of original size [2021-07-09 18:36:26,313 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:36:26,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-09 18:36:26,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:26,382 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:36:26,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-09 18:36:26,390 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:27,440 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 182 DAG size of output: 176 [2021-07-09 18:36:27,440 INFO L628 ElimStorePlain]: treesize reduction 44, result has 95.4 percent of original size [2021-07-09 18:36:27,504 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:36:27,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-07-09 18:36:27,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:27,558 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:36:27,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-07-09 18:36:27,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,589 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 177 DAG size of output: 167 [2021-07-09 18:36:28,590 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.0 percent of original size [2021-07-09 18:36:28,646 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:36:28,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-07-09 18:36:28,650 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,694 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:36:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:36:28,699 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,190 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:36:29,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,236 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-07-09 18:36:29,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-07-09 18:36:29,238 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,284 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:36:29,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-07-09 18:36:29,287 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,775 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 18:36:29,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-09 18:36:29,841 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,886 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:36:29,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-09 18:36:29,894 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:30,365 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-09 18:36:30,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:30,417 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:36:30,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-09 18:36:30,429 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:30,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:30,445 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:36:30,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:36:30,446 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:30,859 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-09 18:36:30,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:30,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-09 18:36:30,903 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:957, output treesize:1656 [2021-07-09 18:36:31,483 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-07-09 18:36:31,773 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:36:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:31,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794629561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:31,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:31,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:36:31,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777634893] [2021-07-09 18:36:31,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:36:31,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:31,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:36:31,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:36:31,940 INFO L87 Difference]: Start difference. First operand 1841 states and 6250 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:32,297 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-09 18:36:32,674 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2021-07-09 18:36:32,886 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-09 18:36:33,279 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-07-09 18:36:33,860 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-09 18:36:34,107 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 18:36:34,438 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-07-09 18:36:34,608 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-07-09 18:36:35,169 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2021-07-09 18:36:35,663 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-07-09 18:36:36,060 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-07-09 18:36:36,233 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-07-09 18:36:36,552 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2021-07-09 18:36:37,178 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 76 [2021-07-09 18:36:37,467 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-07-09 18:36:37,722 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2021-07-09 18:36:38,518 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-07-09 18:36:39,474 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 77 [2021-07-09 18:36:39,818 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-07-09 18:36:40,328 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-07-09 18:36:40,568 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2021-07-09 18:36:40,784 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2021-07-09 18:36:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:40,917 INFO L93 Difference]: Finished difference Result 3177 states and 10241 transitions. [2021-07-09 18:36:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:36:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:40,923 INFO L225 Difference]: With dead ends: 3177 [2021-07-09 18:36:40,923 INFO L226 Difference]: Without dead ends: 3132 [2021-07-09 18:36:40,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 9469.0ms TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:36:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-07-09 18:36:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1888. [2021-07-09 18:36:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.3995760466348703) internal successors, (6415), 1887 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6415 transitions. [2021-07-09 18:36:40,961 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6415 transitions. Word has length 26 [2021-07-09 18:36:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:40,961 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6415 transitions. [2021-07-09 18:36:40,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6415 transitions. [2021-07-09 18:36:40,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:40,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:40,965 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:41,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2138 [2021-07-09 18:36:41,165 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:41,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-07-09 18:36:41,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:41,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545183144] [2021-07-09 18:36:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:41,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:41,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545183144] [2021-07-09 18:36:41,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545183144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:41,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106953295] [2021-07-09 18:36:41,662 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 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 [2021-07-09 18:36:41,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:36:41,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:42,017 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-09 18:36:42,171 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_287], 6=[v_prenex_285, v_prenex_289]} [2021-07-09 18:36:42,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:42,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:42,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:36:42,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:42,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-07-09 18:36:42,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:42,294 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-09 18:36:42,294 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-07-09 18:36:42,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:36:42,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:42,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:42,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:42,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:36:42,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:42,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:42,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:42,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:36:42,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:42,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:42,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:36:42,410 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-07-09 18:36:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106953295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:42,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:42,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:36:42,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670334137] [2021-07-09 18:36:42,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:42,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:42,458 INFO L87 Difference]: Start difference. First operand 1888 states and 6415 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:43,769 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-07-09 18:36:43,968 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-07-09 18:36:44,454 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-07-09 18:36:44,631 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:36:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:44,831 INFO L93 Difference]: Finished difference Result 2395 states and 7935 transitions. [2021-07-09 18:36:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:36:44,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:44,835 INFO L225 Difference]: With dead ends: 2395 [2021-07-09 18:36:44,835 INFO L226 Difference]: Without dead ends: 2380 [2021-07-09 18:36:44,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2580.1ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:36:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-07-09 18:36:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1886. [2021-07-09 18:36:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-07-09 18:36:44,861 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-07-09 18:36:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:44,861 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-07-09 18:36:44,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-07-09 18:36:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:44,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:44,863 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:45,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2263 [2021-07-09 18:36:45,064 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-07-09 18:36:45,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:45,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976043917] [2021-07-09 18:36:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:45,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:45,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976043917] [2021-07-09 18:36:45,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976043917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:45,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224737113] [2021-07-09 18:36:45,477 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 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 [2021-07-09 18:36:45,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:36:45,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:36:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:45,961 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-09 18:36:46,183 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 18:36:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,407 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:36:46,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-09 18:36:46,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:46,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:46,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 18:36:46,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:46,846 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-07-09 18:36:46,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,890 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:36:46,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-09 18:36:46,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,922 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:36:46,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-09 18:36:46,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,310 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-07-09 18:36:47,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,347 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:36:47,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:36:47,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,382 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:36:47,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-09 18:36:47,384 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,793 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-09 18:36:47,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,830 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:36:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 18:36:47,831 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:36:47,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,541 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2021-07-09 18:36:48,541 INFO L628 ElimStorePlain]: treesize reduction 36, result has 94.8 percent of original size [2021-07-09 18:36:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:48,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:36:48,581 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,609 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:36:48,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:36:48,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:49,228 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-07-09 18:36:49,229 INFO L628 ElimStorePlain]: treesize reduction 38, result has 94.0 percent of original size [2021-07-09 18:36:49,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,259 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:36:49,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:36:49,261 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,288 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:36:49,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:36:49,291 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:49,572 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:36:49,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,606 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:36:49,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:36:49,611 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,625 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:49,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:36:49,626 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:49,874 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:36:49,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:49,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,901 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:36:49,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:36:49,903 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:49,926 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:36:49,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:36:49,930 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,338 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-07-09 18:36:50,338 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.7 percent of original size [2021-07-09 18:36:50,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-09 18:36:50,352 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:841, output treesize:391 [2021-07-09 18:36:50,485 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-07-09 18:36:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:50,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224737113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:50,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:50,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-09 18:36:50,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168104775] [2021-07-09 18:36:50,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:36:50,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:36:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:36:50,545 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:50,906 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-09 18:36:51,188 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:36:53,606 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-07-09 18:37:05,938 WARN L205 SmtUtils]: Spent 12.10 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-07-09 18:37:06,881 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 154 [2021-07-09 18:37:07,119 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-09 18:37:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:07,424 INFO L93 Difference]: Finished difference Result 2712 states and 8977 transitions. [2021-07-09 18:37:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:37:07,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:07,429 INFO L225 Difference]: With dead ends: 2712 [2021-07-09 18:37:07,429 INFO L226 Difference]: Without dead ends: 2682 [2021-07-09 18:37:07,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 17196.7ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:37:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-07-09 18:37:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1886. [2021-07-09 18:37:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-07-09 18:37:07,469 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-07-09 18:37:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:07,470 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-07-09 18:37:07,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-07-09 18:37:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:07,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:07,474 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:07,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-07-09 18:37:07,693 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 54 times [2021-07-09 18:37:07,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:07,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022680788] [2021-07-09 18:37:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:08,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:08,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022680788] [2021-07-09 18:37:08,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022680788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:08,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467207753] [2021-07-09 18:37:08,217 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 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 [2021-07-09 18:37:08,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:37:08,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:08,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:08,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,466 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:37:08,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:37:08,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,501 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:37:08,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:37:08,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,523 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:37:08,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,543 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:37:08,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,573 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-09 18:37:08,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-09 18:37:08,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:08,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 18:37:08,611 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,630 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:37:08,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,650 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:37:08,651 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,669 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:37:08,670 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,714 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-09 18:37:08,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:37:08,715 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,732 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:37:08,733 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,751 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:37:08,752 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,769 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:37:08,770 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,787 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:37:08,788 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,804 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:37:08,805 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,815 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:37:08,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:37:08,815 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:08,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:08,859 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-07-09 18:37:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:08,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467207753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:08,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:08,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:37:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653248465] [2021-07-09 18:37:08,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:37:08,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:08,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:37:08,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:08,959 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:09,884 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-07-09 18:37:10,453 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-09 18:37:11,140 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-07-09 18:37:11,502 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-09 18:37:11,836 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-09 18:37:12,060 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-09 18:37:12,237 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-09 18:37:12,443 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-07-09 18:37:12,834 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-09 18:37:13,036 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-07-09 18:37:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:13,260 INFO L93 Difference]: Finished difference Result 3398 states and 10882 transitions. [2021-07-09 18:37:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:37:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:13,267 INFO L225 Difference]: With dead ends: 3398 [2021-07-09 18:37:13,267 INFO L226 Difference]: Without dead ends: 3364 [2021-07-09 18:37:13,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4253.8ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:37:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-07-09 18:37:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1892. [2021-07-09 18:37:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.405076679005817) internal successors, (6439), 1891 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6439 transitions. [2021-07-09 18:37:13,301 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6439 transitions. Word has length 26 [2021-07-09 18:37:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:13,301 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6439 transitions. [2021-07-09 18:37:13,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6439 transitions. [2021-07-09 18:37:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:13,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:13,304 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:13,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2347 [2021-07-09 18:37:13,509 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:13,509 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 33 times [2021-07-09 18:37:13,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:13,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297074778] [2021-07-09 18:37:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:13,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:13,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297074778] [2021-07-09 18:37:13,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297074778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:13,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946043763] [2021-07-09 18:37:13,905 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 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 [2021-07-09 18:37:13,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:37:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:14,440 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-09 18:37:14,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:14,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:14,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,778 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:37:14,778 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-07-09 18:37:14,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:14,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:14,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:14,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:14,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:14,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:14,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:14,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,912 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:14,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:14,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:14,961 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-07-09 18:37:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:15,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946043763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:15,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:15,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:37:15,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184741007] [2021-07-09 18:37:15,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:15,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:15,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:15,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:15,014 INFO L87 Difference]: Start difference. First operand 1892 states and 6439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:15,842 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-09 18:37:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:16,045 INFO L93 Difference]: Finished difference Result 2313 states and 7725 transitions. [2021-07-09 18:37:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:37:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:16,050 INFO L225 Difference]: With dead ends: 2313 [2021-07-09 18:37:16,050 INFO L226 Difference]: Without dead ends: 2298 [2021-07-09 18:37:16,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1531.2ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:37:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-09 18:37:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1884. [2021-07-09 18:37:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.4083908656399364) internal successors, (6418), 1883 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6418 transitions. [2021-07-09 18:37:16,076 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6418 transitions. Word has length 26 [2021-07-09 18:37:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:16,076 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6418 transitions. [2021-07-09 18:37:16,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6418 transitions. [2021-07-09 18:37:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:16,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:16,079 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:16,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-07-09 18:37:16,280 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:16,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1200955766, now seen corresponding path program 34 times [2021-07-09 18:37:16,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:16,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493007106] [2021-07-09 18:37:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:16,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:16,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493007106] [2021-07-09 18:37:16,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493007106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:16,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13404261] [2021-07-09 18:37:16,705 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 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 [2021-07-09 18:37:16,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:16,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:16,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:17,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:17,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:17,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:17,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:37:17,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:17,118 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:17,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:17,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:17,138 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:17,145 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:17,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:17,158 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:17,164 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:17,171 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:17,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:17,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:17,175 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:17,251 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:37:17,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:17,253 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:37:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:17,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13404261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:17,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:17,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:37:17,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785898587] [2021-07-09 18:37:17,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:17,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:17,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:17,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:17,306 INFO L87 Difference]: Start difference. First operand 1884 states and 6418 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:17,594 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-09 18:37:17,722 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-07-09 18:37:17,951 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-07-09 18:37:18,478 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-09 18:37:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:18,713 INFO L93 Difference]: Finished difference Result 2549 states and 8455 transitions. [2021-07-09 18:37:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:37:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:18,718 INFO L225 Difference]: With dead ends: 2549 [2021-07-09 18:37:18,718 INFO L226 Difference]: Without dead ends: 2534 [2021-07-09 18:37:18,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1678.0ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:37:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-07-09 18:37:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1876. [2021-07-09 18:37:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.4074666666666666) internal successors, (6389), 1875 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6389 transitions. [2021-07-09 18:37:18,748 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6389 transitions. Word has length 26 [2021-07-09 18:37:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:18,748 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 6389 transitions. [2021-07-09 18:37:18,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6389 transitions. [2021-07-09 18:37:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:18,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:18,751 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:18,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:18,952 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:18,952 INFO L82 PathProgramCache]: Analyzing trace with hash -179287784, now seen corresponding path program 35 times [2021-07-09 18:37:18,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:18,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514970759] [2021-07-09 18:37:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:19,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514970759] [2021-07-09 18:37:19,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514970759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457865858] [2021-07-09 18:37:19,271 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 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 [2021-07-09 18:37:19,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:37:19,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:19,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:19,899 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:19,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:37:19,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:19,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:19,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:37:19,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,110 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 18:37:20,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,136 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:20,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:37:20,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,159 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:20,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:37:20,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,309 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 18:37:20,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:37:20,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,347 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:20,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:20,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,492 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:37:20,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:20,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,515 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:20,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:37:20,520 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:20,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:37:20,537 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,669 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-09 18:37:20,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:20,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:20,691 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:314 [2021-07-09 18:37:20,919 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-09 18:37:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457865858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:21,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:21,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:37:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525688865] [2021-07-09 18:37:21,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:37:21,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:21,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:37:21,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:21,024 INFO L87 Difference]: Start difference. First operand 1876 states and 6389 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:21,787 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-09 18:37:22,001 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-07-09 18:37:22,329 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-09 18:37:22,738 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-09 18:37:22,978 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-09 18:37:23,275 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-09 18:37:23,621 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-07-09 18:37:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:23,698 INFO L93 Difference]: Finished difference Result 2284 states and 7582 transitions. [2021-07-09 18:37:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:37:23,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:23,702 INFO L225 Difference]: With dead ends: 2284 [2021-07-09 18:37:23,702 INFO L226 Difference]: Without dead ends: 2269 [2021-07-09 18:37:23,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2642.6ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:37:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-07-09 18:37:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1867. [2021-07-09 18:37:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.404608788853162) internal successors, (6353), 1866 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6353 transitions. [2021-07-09 18:37:23,733 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6353 transitions. Word has length 26 [2021-07-09 18:37:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:23,733 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6353 transitions. [2021-07-09 18:37:23,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6353 transitions. [2021-07-09 18:37:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:23,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:23,738 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:23,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2424,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:23,953 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 36 times [2021-07-09 18:37:23,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:23,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865901697] [2021-07-09 18:37:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:24,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:24,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865901697] [2021-07-09 18:37:24,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865901697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:24,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060150490] [2021-07-09 18:37:24,300 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 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 [2021-07-09 18:37:24,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:37:24,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:24,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:24,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:24,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,578 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:24,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:24,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,587 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:24,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:24,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,600 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:24,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:24,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,613 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:24,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:24,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:24,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:24,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,636 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:24,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:24,637 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:24,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:37:24,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:24,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:37:24,665 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,674 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:24,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:37:24,675 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,684 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:24,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:37:24,685 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:24,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:24,699 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:24,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:37:24,713 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:24,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:24,728 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,736 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:24,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:24,737 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,743 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:24,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:24,743 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:24,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:24,821 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:37:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:25,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060150490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:25,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:25,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:37:25,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776914107] [2021-07-09 18:37:25,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:25,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:25,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:25,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:25,012 INFO L87 Difference]: Start difference. First operand 1867 states and 6353 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:25,563 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-09 18:37:25,930 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-07-09 18:37:26,094 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-07-09 18:37:26,260 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-09 18:37:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:26,447 INFO L93 Difference]: Finished difference Result 2064 states and 6910 transitions. [2021-07-09 18:37:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:37:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:26,451 INFO L225 Difference]: With dead ends: 2064 [2021-07-09 18:37:26,452 INFO L226 Difference]: Without dead ends: 2049 [2021-07-09 18:37:26,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1687.8ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:37:26,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-09 18:37:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1860. [2021-07-09 18:37:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-07-09 18:37:26,479 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-07-09 18:37:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:26,479 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-07-09 18:37:26,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-07-09 18:37:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:26,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:26,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:26,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:26,682 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:26,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 37 times [2021-07-09 18:37:26,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:26,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767139008] [2021-07-09 18:37:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:27,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:27,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767139008] [2021-07-09 18:37:27,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767139008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:27,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512602489] [2021-07-09 18:37:27,038 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 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 [2021-07-09 18:37:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:27,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:37:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:27,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:27,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:37:27,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:27,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:27,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:27,420 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:27,426 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:27,432 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:27,438 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:27,444 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:27,450 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:27,456 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:27,462 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:27,468 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:27,474 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:27,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:27,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:27,478 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:27,556 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:37:27,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:27,558 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:37:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:27,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512602489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:27,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:27,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:37:27,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930670554] [2021-07-09 18:37:27,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:27,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:27,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:27,610 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:28,285 INFO L93 Difference]: Finished difference Result 2341 states and 7786 transitions. [2021-07-09 18:37:28,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:37:28,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:28,289 INFO L225 Difference]: With dead ends: 2341 [2021-07-09 18:37:28,289 INFO L226 Difference]: Without dead ends: 2320 [2021-07-09 18:37:28,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 968.1ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:37:28,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-09 18:37:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1860. [2021-07-09 18:37:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-07-09 18:37:28,316 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-07-09 18:37:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:28,316 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-07-09 18:37:28,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-07-09 18:37:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:28,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:28,318 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:28,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2508 [2021-07-09 18:37:28,519 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 38 times [2021-07-09 18:37:28,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:28,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830472954] [2021-07-09 18:37:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:28,723 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-07-09 18:37:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:28,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:28,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830472954] [2021-07-09 18:37:28,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830472954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:28,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089359937] [2021-07-09 18:37:28,891 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 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 [2021-07-09 18:37:28,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:28,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:28,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:29,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:29,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,242 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:29,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:29,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:29,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:37:29,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,272 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:29,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:37:29,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:37:29,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,306 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:29,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:29,308 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:29,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:29,322 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:29,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:37:29,336 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:29,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:29,352 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:29,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:29,366 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:29,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:29,381 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,393 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:29,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:29,394 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:29,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:29,404 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,413 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:29,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:29,414 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,426 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:29,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:37:29,427 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:29,433 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:29,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:29,434 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:29,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:29,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:29,526 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-09 18:37:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:29,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089359937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:29,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:37:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551923819] [2021-07-09 18:37:29,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:29,734 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:30,312 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-09 18:37:30,833 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-07-09 18:37:31,042 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-07-09 18:37:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:31,095 INFO L93 Difference]: Finished difference Result 2236 states and 7452 transitions. [2021-07-09 18:37:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:37:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:31,099 INFO L225 Difference]: With dead ends: 2236 [2021-07-09 18:37:31,099 INFO L226 Difference]: Without dead ends: 2207 [2021-07-09 18:37:31,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1660.6ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:37:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-07-09 18:37:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1840. [2021-07-09 18:37:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3953235454051116) internal successors, (6244), 1839 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) [2021-07-09 18:37:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6244 transitions. [2021-07-09 18:37:31,125 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6244 transitions. Word has length 26 [2021-07-09 18:37:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:31,126 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6244 transitions. [2021-07-09 18:37:31,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:31,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6244 transitions. [2021-07-09 18:37:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:31,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:31,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:31,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-07-09 18:37:31,329 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:31,329 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-07-09 18:37:31,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:31,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415769142] [2021-07-09 18:37:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:31,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:31,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415769142] [2021-07-09 18:37:31,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415769142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:31,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23659805] [2021-07-09 18:37:31,640 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 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 [2021-07-09 18:37:31,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:37:31,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:31,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:32,138 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:32,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:37:32,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:32,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:32,165 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:32,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:37:32,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:32,328 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:37:32,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:32,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:32,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:37:32,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:32,373 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:32,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:37:32,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:32,688 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-09 18:37:32,688 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-07-09 18:37:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:32,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:32,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:37:32,713 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:32,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:32,732 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:32,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:37:32,734 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:32,878 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 18:37:32,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:32,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:32,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:37:32,905 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:32,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:32,924 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:32,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:32,925 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:33,178 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-09 18:37:33,179 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-07-09 18:37:33,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:33,196 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-07-09 18:37:33,434 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:37:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:33,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23659805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:33,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:33,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:37:33,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587919542] [2021-07-09 18:37:33,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:33,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:33,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:33,542 INFO L87 Difference]: Start difference. First operand 1840 states and 6244 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:34,236 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 18:37:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:34,469 INFO L93 Difference]: Finished difference Result 2047 states and 6843 transitions. [2021-07-09 18:37:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:37:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:34,472 INFO L225 Difference]: With dead ends: 2047 [2021-07-09 18:37:34,472 INFO L226 Difference]: Without dead ends: 2022 [2021-07-09 18:37:34,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1382.3ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:37:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-07-09 18:37:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1822. [2021-07-09 18:37:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.399231191652938) internal successors, (6190), 1821 states have internal predecessors, (6190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6190 transitions. [2021-07-09 18:37:34,496 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6190 transitions. Word has length 26 [2021-07-09 18:37:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:34,496 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6190 transitions. [2021-07-09 18:37:34,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6190 transitions. [2021-07-09 18:37:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:34,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:34,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:34,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:34,699 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 827344434, now seen corresponding path program 40 times [2021-07-09 18:37:34,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:34,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473199680] [2021-07-09 18:37:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:35,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:35,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473199680] [2021-07-09 18:37:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473199680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:35,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180871488] [2021-07-09 18:37:35,099 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 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 [2021-07-09 18:37:35,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:35,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:35,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:35,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:35,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:37:35,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:37:35,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,416 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:35,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:37:35,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,433 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:35,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:37:35,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-09 18:37:35,453 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,465 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:35,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:37:35,466 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,477 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:35,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:37:35,478 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:37:35,497 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,511 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:35,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:37:35,512 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-09 18:37:35,530 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,543 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:35,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:37:35,544 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,557 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:35,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:37:35,558 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,573 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:35,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:37:35,575 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,587 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:35,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:37:35,588 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:37:35,604 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:35,614 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:35,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-09 18:37:35,615 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:35,695 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-09 18:37:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:35,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180871488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:35,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:35,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:37:35,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237011694] [2021-07-09 18:37:35,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:35,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:35,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:35,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:35,913 INFO L87 Difference]: Start difference. First operand 1822 states and 6190 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:36,551 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-07-09 18:37:37,145 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 18:37:37,303 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-09 18:37:37,580 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:37:37,902 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-09 18:37:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:37,972 INFO L93 Difference]: Finished difference Result 2419 states and 8019 transitions. [2021-07-09 18:37:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:37:37,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:37,976 INFO L225 Difference]: With dead ends: 2419 [2021-07-09 18:37:37,976 INFO L226 Difference]: Without dead ends: 2400 [2021-07-09 18:37:37,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2271.1ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:37:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-07-09 18:37:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1803. [2021-07-09 18:37:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.3990011098779136) internal successors, (6125), 1802 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 6125 transitions. [2021-07-09 18:37:38,001 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 6125 transitions. Word has length 26 [2021-07-09 18:37:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,001 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 6125 transitions. [2021-07-09 18:37:38,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 6125 transitions. [2021-07-09 18:37:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:38,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:38,003 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:38,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2637,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:38,204 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:38,204 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-07-09 18:37:38,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:38,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067975] [2021-07-09 18:37:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:38,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067975] [2021-07-09 18:37:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225903778] [2021-07-09 18:37:38,563 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 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 [2021-07-09 18:37:38,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:37:38,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:37:38,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:38,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:38,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:38,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:38,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:38,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:38,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:38,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:38,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:38,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:38,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:38,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:39,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:39,011 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:39,017 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:39,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:37:39,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:39,034 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:39,040 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:39,046 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:39,051 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:39,057 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:39,062 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:39,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:39,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:39,067 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,146 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:37:39,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:39,147 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:37:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225903778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:39,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:39,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:37:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982594208] [2021-07-09 18:37:39,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:37:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:37:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:37:39,203 INFO L87 Difference]: Start difference. First operand 1803 states and 6125 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:39,774 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-09 18:37:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:40,107 INFO L93 Difference]: Finished difference Result 2310 states and 7688 transitions. [2021-07-09 18:37:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:37:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:40,111 INFO L225 Difference]: With dead ends: 2310 [2021-07-09 18:37:40,112 INFO L226 Difference]: Without dead ends: 2295 [2021-07-09 18:37:40,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1150.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:37:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-09 18:37:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1848. [2021-07-09 18:37:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-07-09 18:37:40,136 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-07-09 18:37:40,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:40,136 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-07-09 18:37:40,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-07-09 18:37:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:40,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:40,139 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:40,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-07-09 18:37:40,340 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:40,340 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-07-09 18:37:40,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:40,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010435365] [2021-07-09 18:37:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:40,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:40,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010435365] [2021-07-09 18:37:40,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010435365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:40,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987090376] [2021-07-09 18:37:40,633 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 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 [2021-07-09 18:37:40,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:37:40,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:37:40,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:40,961 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:40,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:40,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:40,981 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:40,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:40,991 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:40,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:40,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,010 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:41,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:37:41,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,037 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:41,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:41,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,052 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:41,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:37:41,053 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:41,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:37:41,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,110 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:41,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:37:41,114 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:41,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:37:41,132 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,153 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:41,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:37:41,155 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,165 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:41,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:41,165 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,186 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:41,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:37:41,190 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,200 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:41,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:37:41,201 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,210 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:41,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:41,211 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,221 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:41,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:41,222 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:41,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:37:41,237 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:41,356 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-09 18:37:41,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:41,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:41,386 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-07-09 18:37:41,692 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 18:37:41,963 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-09 18:37:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:42,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987090376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:42,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:42,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:37:42,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424295219] [2021-07-09 18:37:42,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:42,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:42,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:42,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:42,082 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:42,570 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-07-09 18:37:42,952 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-09 18:37:43,130 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-07-09 18:37:43,328 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-09 18:37:43,488 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-07-09 18:37:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:43,558 INFO L93 Difference]: Finished difference Result 2570 states and 8519 transitions. [2021-07-09 18:37:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:37:43,558 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:43,563 INFO L225 Difference]: With dead ends: 2570 [2021-07-09 18:37:43,563 INFO L226 Difference]: Without dead ends: 2555 [2021-07-09 18:37:43,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2121.8ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:37:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-07-09 18:37:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1848. [2021-07-09 18:37:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-07-09 18:37:43,592 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-07-09 18:37:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:43,592 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-07-09 18:37:43,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-07-09 18:37:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:43,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:43,595 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:43,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2690 [2021-07-09 18:37:43,797 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:43,797 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-07-09 18:37:43,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:43,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478602753] [2021-07-09 18:37:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:44,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:44,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478602753] [2021-07-09 18:37:44,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478602753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:44,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145012222] [2021-07-09 18:37:44,051 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 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 [2021-07-09 18:37:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:44,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:37:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:44,387 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_327, v_prenex_329], 3=[A, v_prenex_331]} [2021-07-09 18:37:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:44,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:44,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:44,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:44,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:44,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:44,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:44,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:44,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:44,571 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-09 18:37:44,571 INFO L628 ElimStorePlain]: treesize reduction 129, result has 54.9 percent of original size [2021-07-09 18:37:44,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:44,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:44,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:44,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:44,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:44,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:44,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:44,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:44,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:44,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:44,635 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:37:44,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:44,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:44,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:44,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:37:44,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:44,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:44,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:44,730 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:325, output treesize:51 [2021-07-09 18:37:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:44,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145012222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:44,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:44,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:37:44,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884280904] [2021-07-09 18:37:44,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:44,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:44,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:44,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:44,793 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,467 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-07-09 18:37:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:45,583 INFO L93 Difference]: Finished difference Result 2415 states and 7997 transitions. [2021-07-09 18:37:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:37:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:45,587 INFO L225 Difference]: With dead ends: 2415 [2021-07-09 18:37:45,587 INFO L226 Difference]: Without dead ends: 2385 [2021-07-09 18:37:45,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1050.4ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:37:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-07-09 18:37:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1850. [2021-07-09 18:37:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.3958896700919414) internal successors, (6279), 1849 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6279 transitions. [2021-07-09 18:37:45,614 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6279 transitions. Word has length 26 [2021-07-09 18:37:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:45,614 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 6279 transitions. [2021-07-09 18:37:45,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6279 transitions. [2021-07-09 18:37:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:45,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:45,616 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:45,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-07-09 18:37:45,817 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-07-09 18:37:45,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:45,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165272246] [2021-07-09 18:37:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:46,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:46,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165272246] [2021-07-09 18:37:46,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165272246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:46,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772875506] [2021-07-09 18:37:46,164 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 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 [2021-07-09 18:37:46,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:46,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:46,399 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-07-09 18:37:46,567 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-09 18:37:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:46,769 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:46,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:37:46,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:46,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:46,796 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:46,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:37:46,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:46,963 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:37:46,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:46,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:46,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:37:46,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:46,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,008 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:47,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:37:47,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,168 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:37:47,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:47,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:47,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:37:47,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,212 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:47,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:37:47,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,508 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-07-09 18:37:47,509 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-07-09 18:37:47,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:47,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:37:47,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,550 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:47,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:47,551 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,809 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-09 18:37:47,810 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-07-09 18:37:47,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:47,826 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:256 [2021-07-09 18:37:48,041 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 18:37:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:48,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772875506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:48,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:48,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:37:48,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539145806] [2021-07-09 18:37:48,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:37:48,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:48,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:37:48,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:37:48,140 INFO L87 Difference]: Start difference. First operand 1850 states and 6279 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-07-09 18:37:48,631 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-07-09 18:37:49,156 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-09 18:37:49,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:49,185 INFO L93 Difference]: Finished difference Result 2425 states and 8078 transitions. [2021-07-09 18:37:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:37:49,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 26 [2021-07-09 18:37:49,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:49,189 INFO L225 Difference]: With dead ends: 2425 [2021-07-09 18:37:49,189 INFO L226 Difference]: Without dead ends: 2410 [2021-07-09 18:37:49,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1658.7ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:37:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-09 18:37:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1868. [2021-07-09 18:37:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.392072844134976) internal successors, (6333), 1867 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6333 transitions. [2021-07-09 18:37:49,216 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6333 transitions. Word has length 26 [2021-07-09 18:37:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:49,216 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6333 transitions. [2021-07-09 18:37:49,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-07-09 18:37:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6333 transitions. [2021-07-09 18:37:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:49,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:49,218 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:49,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:49,419 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:49,419 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-07-09 18:37:49,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:49,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938183688] [2021-07-09 18:37:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938183688] [2021-07-09 18:37:49,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938183688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346221928] [2021-07-09 18:37:49,814 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 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 [2021-07-09 18:37:49,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:37:49,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:49,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:50,281 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:37:50,540 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-07-09 18:37:50,620 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_349, v_prenex_347], 2=[A, v_prenex_348]} [2021-07-09 18:37:50,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,626 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:50,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,632 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:37:50,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,776 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-09 18:37:50,776 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-07-09 18:37:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,780 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:37:50,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:50,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:50,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:50,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:50,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:50,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:50,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:50,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:50,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:50,937 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:285, output treesize:51 [2021-07-09 18:37:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:50,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346221928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:50,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:50,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:37:50,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525644288] [2021-07-09 18:37:50,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:50,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:50,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:50,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:50,997 INFO L87 Difference]: Start difference. First operand 1868 states and 6333 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-07-09 18:37:51,893 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:37:52,147 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-07-09 18:37:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:52,260 INFO L93 Difference]: Finished difference Result 2321 states and 7745 transitions. [2021-07-09 18:37:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:37:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-07-09 18:37:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:52,264 INFO L225 Difference]: With dead ends: 2321 [2021-07-09 18:37:52,264 INFO L226 Difference]: Without dead ends: 2306 [2021-07-09 18:37:52,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1867.5ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:37:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-09 18:37:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1889. [2021-07-09 18:37:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3887711864406778) internal successors, (6398), 1888 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6398 transitions. [2021-07-09 18:37:52,291 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6398 transitions. Word has length 26 [2021-07-09 18:37:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:52,291 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 6398 transitions. [2021-07-09 18:37:52,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-07-09 18:37:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6398 transitions. [2021-07-09 18:37:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:52,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:52,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:52,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-07-09 18:37:52,494 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-07-09 18:37:52,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:52,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267664496] [2021-07-09 18:37:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:52,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:52,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267664496] [2021-07-09 18:37:52,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267664496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:52,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563151227] [2021-07-09 18:37:52,825 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 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 [2021-07-09 18:37:52,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:52,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:52,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:52,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:53,255 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-09 18:37:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:53,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,441 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:37:53,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:53,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:53,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:37:53,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,571 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 18:37:53,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,585 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:53,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:53,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,698 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-09 18:37:53,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:53,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:53,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,838 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:37:53,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:53,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,851 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:53,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:37:53,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,958 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 18:37:53,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:53,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:53,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:53,971 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:54,073 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-09 18:37:54,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:54,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:54,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:54,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:54,087 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:54,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:54,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:54,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:37:54,200 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:54,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:54,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:54,301 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:37:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:54,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563151227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:54,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:54,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:37:54,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469105787] [2021-07-09 18:37:54,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:54,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:54,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:54,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:54,495 INFO L87 Difference]: Start difference. First operand 1889 states and 6398 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-07-09 18:37:55,259 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:37:55,636 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-09 18:37:55,984 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-09 18:37:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:56,206 INFO L93 Difference]: Finished difference Result 2617 states and 8667 transitions. [2021-07-09 18:37:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:37:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-07-09 18:37:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:56,211 INFO L225 Difference]: With dead ends: 2617 [2021-07-09 18:37:56,211 INFO L226 Difference]: Without dead ends: 2602 [2021-07-09 18:37:56,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2078.4ms TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:37:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-07-09 18:37:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1886. [2021-07-09 18:37:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.389920424403183) internal successors, (6390), 1885 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6390 transitions. [2021-07-09 18:37:56,238 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6390 transitions. Word has length 26 [2021-07-09 18:37:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:56,238 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6390 transitions. [2021-07-09 18:37:56,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-07-09 18:37:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6390 transitions. [2021-07-09 18:37:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:56,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:56,241 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:56,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2825,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:56,443 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:56,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:56,443 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-07-09 18:37:56,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:56,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672887784] [2021-07-09 18:37:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:56,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:56,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672887784] [2021-07-09 18:37:56,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672887784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:56,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651928455] [2021-07-09 18:37:56,749 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 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 [2021-07-09 18:37:56,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:37:56,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:37:56,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:57,187 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-09 18:37:57,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:37:57,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,324 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:57,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:57,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,459 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:37:57,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:37:57,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,485 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:57,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:57,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,629 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:37:57,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:57,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,656 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:57,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:37:57,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,767 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-07-09 18:37:57,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:57,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:57,792 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,893 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-09 18:37:57,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:57,900 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-07-09 18:37:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:58,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651928455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:58,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:58,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:37:58,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089973938] [2021-07-09 18:37:58,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:58,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:58,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:58,093 INFO L87 Difference]: Start difference. First operand 1886 states and 6390 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:59,020 INFO L93 Difference]: Finished difference Result 2461 states and 8175 transitions. [2021-07-09 18:37:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:37:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:59,024 INFO L225 Difference]: With dead ends: 2461 [2021-07-09 18:37:59,024 INFO L226 Difference]: Without dead ends: 2436 [2021-07-09 18:37:59,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1375.0ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:37:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-07-09 18:37:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1886. [2021-07-09 18:37:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-07-09 18:37:59,049 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-07-09 18:37:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:59,050 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-07-09 18:37:59,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-07-09 18:37:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:59,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:59,052 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:59,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-07-09 18:37:59,253 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:59,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-07-09 18:37:59,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:59,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724978347] [2021-07-09 18:37:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:59,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724978347] [2021-07-09 18:37:59,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724978347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019861985] [2021-07-09 18:37:59,633 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 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 [2021-07-09 18:37:59,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:37:59,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:59,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,855 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:59,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:59,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,864 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:59,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:59,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,872 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:59,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:59,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:59,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:59,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,897 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:59,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:59,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:59,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:59,911 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,920 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:59,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:59,920 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:59,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:37:59,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:59,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:37:59,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,956 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:59,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:37:59,957 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,965 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:59,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:37:59,966 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:59,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:59,980 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:59,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:37:59,992 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:00,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:00,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:00,006 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:00,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:00,015 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:00,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:00,015 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:00,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:00,021 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:00,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:00,022 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:00,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:00,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:00,099 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:38:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:00,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019861985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:00,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:00,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:38:00,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366842740] [2021-07-09 18:38:00,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:00,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:00,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:00,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:00,307 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,057 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 18:38:01,245 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-09 18:38:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:01,315 INFO L93 Difference]: Finished difference Result 2412 states and 8043 transitions. [2021-07-09 18:38:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:38:01,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:01,320 INFO L225 Difference]: With dead ends: 2412 [2021-07-09 18:38:01,320 INFO L226 Difference]: Without dead ends: 2397 [2021-07-09 18:38:01,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1334.7ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:38:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-09 18:38:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1886. [2021-07-09 18:38:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-07-09 18:38:01,358 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-07-09 18:38:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:01,359 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-07-09 18:38:01,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-07-09 18:38:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:01,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:01,362 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:01,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:01,562 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-07-09 18:38:01,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:01,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237167115] [2021-07-09 18:38:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:01,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:01,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237167115] [2021-07-09 18:38:01,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237167115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:01,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118299742] [2021-07-09 18:38:01,921 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 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 [2021-07-09 18:38:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:01,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:01,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:02,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:02,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:02,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:02,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:02,402 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:02,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:02,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:02,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:02,432 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:02,440 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:02,447 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:02,454 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:02,462 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:02,469 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:02,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:02,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:38:02,473 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:02,498 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:38:02,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:02,500 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:38:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:02,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118299742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:02,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:02,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:38:02,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029474167] [2021-07-09 18:38:02,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:02,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:02,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:02,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:02,530 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-07-09 18:38:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:03,244 INFO L93 Difference]: Finished difference Result 2181 states and 7107 transitions. [2021-07-09 18:38:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 26 [2021-07-09 18:38:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:03,248 INFO L225 Difference]: With dead ends: 2181 [2021-07-09 18:38:03,248 INFO L226 Difference]: Without dead ends: 2144 [2021-07-09 18:38:03,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 958.2ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:38:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-07-09 18:38:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1906. [2021-07-09 18:38:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.391076115485564) internal successors, (6460), 1905 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6460 transitions. [2021-07-09 18:38:03,276 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6460 transitions. Word has length 26 [2021-07-09 18:38:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:03,276 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6460 transitions. [2021-07-09 18:38:03,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-07-09 18:38:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6460 transitions. [2021-07-09 18:38:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:03,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:03,279 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:03,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-07-09 18:38:03,480 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-07-09 18:38:03,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:03,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658221524] [2021-07-09 18:38:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:03,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:03,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658221524] [2021-07-09 18:38:03,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658221524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:03,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730806187] [2021-07-09 18:38:03,831 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 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 [2021-07-09 18:38:03,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:03,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:04,105 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-09 18:38:04,156 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_376, v_prenex_378], 6=[A, v_prenex_374]} [2021-07-09 18:38:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:04,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:04,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-07-09 18:38:04,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:04,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:38:04,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,282 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-09 18:38:04,283 INFO L628 ElimStorePlain]: treesize reduction 156, result has 44.9 percent of original size [2021-07-09 18:38:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:38:04,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:04,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:38:04,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:04,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:04,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:38:04,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:38:04,401 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:41 [2021-07-09 18:38:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:04,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730806187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:04,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:04,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:38:04,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398579045] [2021-07-09 18:38:04,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:04,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:04,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:04,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:04,450 INFO L87 Difference]: Start difference. First operand 1906 states and 6460 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-07-09 18:38:05,380 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-09 18:38:05,530 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-07-09 18:38:05,668 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 18:38:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:05,776 INFO L93 Difference]: Finished difference Result 2358 states and 7788 transitions. [2021-07-09 18:38:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:38:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 26 [2021-07-09 18:38:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:05,780 INFO L225 Difference]: With dead ends: 2358 [2021-07-09 18:38:05,780 INFO L226 Difference]: Without dead ends: 2312 [2021-07-09 18:38:05,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1558.6ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-07-09 18:38:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1906. [2021-07-09 18:38:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.3858267716535435) internal successors, (6450), 1905 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:05,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6450 transitions. [2021-07-09 18:38:05,806 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6450 transitions. Word has length 26 [2021-07-09 18:38:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:05,806 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6450 transitions. [2021-07-09 18:38:05,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-07-09 18:38:05,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6450 transitions. [2021-07-09 18:38:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:05,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:05,809 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:06,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-07-09 18:38:06,010 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:06,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:06,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-07-09 18:38:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:06,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952038859] [2021-07-09 18:38:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:06,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:06,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952038859] [2021-07-09 18:38:06,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952038859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:06,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677385184] [2021-07-09 18:38:06,375 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 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 [2021-07-09 18:38:06,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:06,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:06,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:38:06,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:06,848 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:38:07,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,144 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:38:07,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-09 18:38:07,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,177 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:07,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:38:07,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:07,572 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-07-09 18:38:07,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:07,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,613 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:07,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:38:07,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:07,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,644 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:38:07,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:38:07,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,007 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-09 18:38:08,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,043 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:38:08,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-09 18:38:08,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,084 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:38:08,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-09 18:38:08,088 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,446 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-09 18:38:08,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,476 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:38:08,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-09 18:38:08,478 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:08,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 18:38:08,509 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,821 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:38:08,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:08,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,858 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:08,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-07-09 18:38:08,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:08,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:38:08,892 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:09,464 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-07-09 18:38:09,464 INFO L628 ElimStorePlain]: treesize reduction 33, result has 94.4 percent of original size [2021-07-09 18:38:09,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:09,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:09,496 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:09,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:38:09,500 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:09,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:09,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:09,514 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:38:09,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:38:09,515 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:09,764 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:38:09,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:09,798 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:09,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:38:09,801 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:09,823 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:38:09,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-09 18:38:09,825 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,055 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:38:10,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:10,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,089 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:10,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:38:10,093 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,107 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:38:10,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:38:10,108 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,292 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:38:10,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:10,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-09 18:38:10,305 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:340 [2021-07-09 18:38:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:10,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677385184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:10,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:10,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:38:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825945107] [2021-07-09 18:38:10,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:10,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:10,487 INFO L87 Difference]: Start difference. First operand 1906 states and 6450 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:11,603 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 18:38:11,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:11,926 INFO L93 Difference]: Finished difference Result 2168 states and 7234 transitions. [2021-07-09 18:38:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:11,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:11,930 INFO L225 Difference]: With dead ends: 2168 [2021-07-09 18:38:11,930 INFO L226 Difference]: Without dead ends: 2153 [2021-07-09 18:38:11,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1683.8ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:38:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-07-09 18:38:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1921. [2021-07-09 18:38:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.3921875) internal successors, (6513), 1920 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6513 transitions. [2021-07-09 18:38:11,954 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6513 transitions. Word has length 26 [2021-07-09 18:38:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:11,954 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6513 transitions. [2021-07-09 18:38:11,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:11,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6513 transitions. [2021-07-09 18:38:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:11,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:11,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:12,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:12,157 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-07-09 18:38:12,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:12,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911559146] [2021-07-09 18:38:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:12,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911559146] [2021-07-09 18:38:12,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911559146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832354298] [2021-07-09 18:38:12,609 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 [2021-07-09 18:38:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:12,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:12,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:12,920 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-09 18:38:13,109 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:38:13,487 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-07-09 18:38:13,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:13,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:13,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,681 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-09 18:38:13,681 INFO L628 ElimStorePlain]: treesize reduction 44, result has 75.1 percent of original size [2021-07-09 18:38:13,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,685 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:13,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:13,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:13,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:13,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:13,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:13,805 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-07-09 18:38:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832354298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:13,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:13,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:38:13,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622205238] [2021-07-09 18:38:13,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:13,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:13,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:13,865 INFO L87 Difference]: Start difference. First operand 1921 states and 6513 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:14,551 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-09 18:38:15,213 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2021-07-09 18:38:15,668 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-07-09 18:38:16,191 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-07-09 18:38:16,699 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2021-07-09 18:38:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:16,931 INFO L93 Difference]: Finished difference Result 2468 states and 8139 transitions. [2021-07-09 18:38:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:38:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:16,935 INFO L225 Difference]: With dead ends: 2468 [2021-07-09 18:38:16,935 INFO L226 Difference]: Without dead ends: 2453 [2021-07-09 18:38:16,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3619.4ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:38:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-07-09 18:38:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1932. [2021-07-09 18:38:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.392542723977214) internal successors, (6551), 1931 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6551 transitions. [2021-07-09 18:38:16,973 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6551 transitions. Word has length 26 [2021-07-09 18:38:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:16,973 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6551 transitions. [2021-07-09 18:38:16,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6551 transitions. [2021-07-09 18:38:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:16,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:16,976 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:17,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-09 18:38:17,176 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-07-09 18:38:17,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:17,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661701561] [2021-07-09 18:38:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:17,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:17,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661701561] [2021-07-09 18:38:17,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661701561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:17,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108361559] [2021-07-09 18:38:17,494 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 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 [2021-07-09 18:38:17,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:17,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:17,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:38:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:18,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:18,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:18,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:18,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:18,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:18,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:18,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:18,102 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:18,110 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:18,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:18,126 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:18,134 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:18,141 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:38:18,148 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:18,156 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:18,160 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,188 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-07-09 18:38:18,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:18,189 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:38:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:18,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108361559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:18,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:18,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:38:18,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194018510] [2021-07-09 18:38:18,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:18,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:18,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:18,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:18,222 INFO L87 Difference]: Start difference. First operand 1932 states and 6551 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-07-09 18:38:18,641 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-09 18:38:18,882 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-09 18:38:19,131 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-09 18:38:19,465 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:38:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:19,773 INFO L93 Difference]: Finished difference Result 2505 states and 8099 transitions. [2021-07-09 18:38:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:38:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-07-09 18:38:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:19,778 INFO L225 Difference]: With dead ends: 2505 [2021-07-09 18:38:19,778 INFO L226 Difference]: Without dead ends: 2483 [2021-07-09 18:38:19,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1646.5ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-07-09 18:38:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1948. [2021-07-09 18:38:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.3954802259887007) internal successors, (6611), 1947 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6611 transitions. [2021-07-09 18:38:19,807 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6611 transitions. Word has length 26 [2021-07-09 18:38:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:19,807 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6611 transitions. [2021-07-09 18:38:19,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-07-09 18:38:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6611 transitions. [2021-07-09 18:38:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:19,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:19,810 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:20,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:20,010 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:20,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-07-09 18:38:20,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:20,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212117202] [2021-07-09 18:38:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:20,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:20,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212117202] [2021-07-09 18:38:20,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212117202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:20,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213325358] [2021-07-09 18:38:20,430 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 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 [2021-07-09 18:38:20,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:20,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:20,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:38:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:20,975 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:38:21,290 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:38:21,449 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_421, v_prenex_422, v_prenex_425], 6=[v_prenex_426, A, v_prenex_420, v_prenex_423, v_prenex_424]} [2021-07-09 18:38:21,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:21,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:38:21,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,924 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-07-09 18:38:21,925 INFO L628 ElimStorePlain]: treesize reduction 307, result has 56.1 percent of original size [2021-07-09 18:38:21,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:21,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:38:21,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,104 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-09 18:38:22,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,127 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:22,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:38:22,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,292 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:38:22,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:22,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-09 18:38:22,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,471 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:38:22,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:22,496 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:38:22,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-09 18:38:22,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,650 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:38:22,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:22,672 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:38:22,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-07-09 18:38:22,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,821 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:38:22,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:22,844 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:38:22,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:38:22,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,989 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-09 18:38:22,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:23,009 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:38:23,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:38:23,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,146 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-09 18:38:23,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:23,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:23,160 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:706, output treesize:429 [2021-07-09 18:38:23,409 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-09 18:38:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:23,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213325358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:23,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:23,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:38:23,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227229127] [2021-07-09 18:38:23,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:23,533 INFO L87 Difference]: Start difference. First operand 1948 states and 6611 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:24,105 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-09 18:38:24,482 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-07-09 18:38:24,776 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:38:25,038 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-07-09 18:38:25,309 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-09 18:38:26,069 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-07-09 18:38:26,929 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2021-07-09 18:38:27,786 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-07-09 18:38:28,385 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2021-07-09 18:38:29,350 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-07-09 18:38:29,883 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2021-07-09 18:38:30,608 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 101 [2021-07-09 18:38:30,859 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-09 18:38:31,076 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-07-09 18:38:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:31,353 INFO L93 Difference]: Finished difference Result 2657 states and 8685 transitions. [2021-07-09 18:38:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:38:31,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:31,358 INFO L225 Difference]: With dead ends: 2657 [2021-07-09 18:38:31,358 INFO L226 Difference]: Without dead ends: 2642 [2021-07-09 18:38:31,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 8042.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:38:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-07-09 18:38:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1952. [2021-07-09 18:38:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 3.3956945156330085) internal successors, (6625), 1951 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 6625 transitions. [2021-07-09 18:38:31,387 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 6625 transitions. Word has length 26 [2021-07-09 18:38:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:31,387 INFO L482 AbstractCegarLoop]: Abstraction has 1952 states and 6625 transitions. [2021-07-09 18:38:31,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 6625 transitions. [2021-07-09 18:38:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:31,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:31,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:31,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3193,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:31,591 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:31,592 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 51 times [2021-07-09 18:38:31,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:31,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743592224] [2021-07-09 18:38:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:31,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:31,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743592224] [2021-07-09 18:38:31,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743592224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:31,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3622952] [2021-07-09 18:38:31,925 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 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 [2021-07-09 18:38:31,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:31,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:31,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:32,285 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:38:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:32,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:32,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:32,465 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:38:32,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:32,480 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:32,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:32,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:32,597 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 18:38:32,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:32,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:38:32,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:32,721 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:38:32,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:32,734 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:32,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:32,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:32,838 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:38:32,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:32,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:32,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:32,954 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 18:38:32,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:32,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:32,969 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,070 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-09 18:38:33,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:33,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:33,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:33,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:33,082 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:33,192 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:33,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:33,193 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:33,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:33,293 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:38:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:33,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3622952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:33,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:33,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:38:33,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233181939] [2021-07-09 18:38:33,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:33,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:33,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:33,491 INFO L87 Difference]: Start difference. First operand 1952 states and 6625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:34,685 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-07-09 18:38:34,994 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:38:35,137 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-09 18:38:35,502 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-07-09 18:38:35,754 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-07-09 18:38:35,974 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 18:38:36,214 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-07-09 18:38:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:36,373 INFO L93 Difference]: Finished difference Result 2972 states and 9683 transitions. [2021-07-09 18:38:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:36,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:36,379 INFO L225 Difference]: With dead ends: 2972 [2021-07-09 18:38:36,379 INFO L226 Difference]: Without dead ends: 2942 [2021-07-09 18:38:36,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2904.7ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:38:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-09 18:38:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1949. [2021-07-09 18:38:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.3983572895277208) internal successors, (6620), 1948 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6620 transitions. [2021-07-09 18:38:36,410 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6620 transitions. Word has length 26 [2021-07-09 18:38:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:36,410 INFO L482 AbstractCegarLoop]: Abstraction has 1949 states and 6620 transitions. [2021-07-09 18:38:36,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6620 transitions. [2021-07-09 18:38:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:36,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:36,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:36,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-07-09 18:38:36,614 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:36,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-07-09 18:38:36,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:36,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388191127] [2021-07-09 18:38:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:36,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:36,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388191127] [2021-07-09 18:38:36,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388191127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:36,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058481483] [2021-07-09 18:38:36,922 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 [2021-07-09 18:38:36,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:38:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:36,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:37,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:37,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:37,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:37,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:37,503 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:37,512 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:37,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:37,530 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:37,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:37,547 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:37,555 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:38:37,563 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:37,572 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:37,580 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:37,585 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,612 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:38:37,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:37,613 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:38:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:37,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058481483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:37,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:37,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:38:37,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80372414] [2021-07-09 18:38:37,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:37,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:37,663 INFO L87 Difference]: Start difference. First operand 1949 states and 6620 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:38,999 INFO L93 Difference]: Finished difference Result 3403 states and 10936 transitions. [2021-07-09 18:38:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:39,005 INFO L225 Difference]: With dead ends: 3403 [2021-07-09 18:38:39,005 INFO L226 Difference]: Without dead ends: 3373 [2021-07-09 18:38:39,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1393.1ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:38:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-07-09 18:38:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 2041. [2021-07-09 18:38:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4073529411764705) internal successors, (6951), 2040 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6951 transitions. [2021-07-09 18:38:39,038 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6951 transitions. Word has length 26 [2021-07-09 18:38:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:39,038 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 6951 transitions. [2021-07-09 18:38:39,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6951 transitions. [2021-07-09 18:38:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:39,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:39,041 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:39,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:39,242 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:39,242 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-07-09 18:38:39,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:39,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802299621] [2021-07-09 18:38:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:39,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:39,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802299621] [2021-07-09 18:38:39,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802299621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:39,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785774693] [2021-07-09 18:38:39,496 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 [2021-07-09 18:38:39,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:38:39,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,104 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-09 18:38:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 41 [2021-07-09 18:38:40,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:40,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-07-09 18:38:40,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,172 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:38:40,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:38:40,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,210 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-09 18:38:40,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-07-09 18:38:40,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,246 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-09 18:38:40,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 28 [2021-07-09 18:38:40,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,267 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:38:40,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:38:40,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,288 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:38:40,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:38:40,289 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:40,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:38:40,332 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,368 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-09 18:38:40,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-07-09 18:38:40,373 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,393 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:38:40,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:38:40,394 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,424 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-09 18:38:40,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 25 [2021-07-09 18:38:40,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,455 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-07-09 18:38:40,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-07-09 18:38:40,456 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,476 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:38:40,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-07-09 18:38:40,477 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,495 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:38:40,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:38:40,496 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,514 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:38:40,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:38:40,515 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:40,528 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:38:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:38:40,529 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:40,778 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-07-09 18:38:40,779 INFO L628 ElimStorePlain]: treesize reduction 193, result has 41.2 percent of original size [2021-07-09 18:38:40,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:38:40,783 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:150 [2021-07-09 18:38:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:41,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785774693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:41,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:41,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:38:41,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041045584] [2021-07-09 18:38:41,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:41,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:41,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:41,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:41,047 INFO L87 Difference]: Start difference. First operand 2041 states and 6951 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:42,330 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-07-09 18:38:42,459 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-07-09 18:38:42,873 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-09 18:38:43,175 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-07-09 18:38:43,534 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-07-09 18:38:43,717 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-09 18:38:44,027 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-07-09 18:38:44,204 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-07-09 18:38:44,417 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:38:44,546 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-07-09 18:38:44,802 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-07-09 18:38:44,963 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-07-09 18:38:45,146 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:38:45,446 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-07-09 18:38:45,619 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-09 18:38:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:45,806 INFO L93 Difference]: Finished difference Result 3293 states and 10339 transitions. [2021-07-09 18:38:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:38:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:45,812 INFO L225 Difference]: With dead ends: 3293 [2021-07-09 18:38:45,812 INFO L226 Difference]: Without dead ends: 3220 [2021-07-09 18:38:45,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4643.9ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:38:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-07-09 18:38:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2049. [2021-07-09 18:38:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-07-09 18:38:45,847 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-07-09 18:38:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:45,847 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-07-09 18:38:45,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-07-09 18:38:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:45,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:45,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:46,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-07-09 18:38:46,051 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash -272116042, now seen corresponding path program 52 times [2021-07-09 18:38:46,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:46,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976031415] [2021-07-09 18:38:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:46,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:46,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976031415] [2021-07-09 18:38:46,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976031415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278546637] [2021-07-09 18:38:46,457 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 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 [2021-07-09 18:38:46,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:46,894 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:38:47,014 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_460, v_prenex_455, v_prenex_457], 6=[A, v_prenex_450, v_prenex_453, v_prenex_444, v_prenex_446]} [2021-07-09 18:38:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:47,044 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:47,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:38:47,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:47,433 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2021-07-09 18:38:47,434 INFO L628 ElimStorePlain]: treesize reduction 283, result has 56.5 percent of original size [2021-07-09 18:38:47,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:47,461 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:47,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:38:47,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:47,611 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-07-09 18:38:47,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:47,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:47,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:47,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:38:47,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:47,934 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2021-07-09 18:38:47,934 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-07-09 18:38:47,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:47,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:47,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:38:47,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,235 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 140 [2021-07-09 18:38:48,236 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-07-09 18:38:48,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,266 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:48,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:38:48,267 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,409 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-07-09 18:38:48,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:48,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:48,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:38:48,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,568 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:38:48,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:48,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,591 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:48,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:38:48,594 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,718 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:38:48,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:48,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,739 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:48,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,862 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-09 18:38:48,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:48,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:48,880 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:658, output treesize:346 [2021-07-09 18:38:49,113 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-09 18:38:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:49,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278546637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:49,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:49,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:38:49,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551921106] [2021-07-09 18:38:49,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:49,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:49,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:49,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:49,219 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:50,532 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-09 18:38:50,659 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:38:51,107 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-09 18:38:51,340 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:38:51,745 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-07-09 18:38:52,080 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2021-07-09 18:38:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:52,148 INFO L93 Difference]: Finished difference Result 2966 states and 9810 transitions. [2021-07-09 18:38:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:38:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:52,153 INFO L225 Difference]: With dead ends: 2966 [2021-07-09 18:38:52,153 INFO L226 Difference]: Without dead ends: 2951 [2021-07-09 18:38:52,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3334.4ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:38:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-09 18:38:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2061. [2021-07-09 18:38:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-07-09 18:38:52,184 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-07-09 18:38:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:52,184 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-07-09 18:38:52,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-07-09 18:38:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:52,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:52,187 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:52,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:52,387 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:52,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 53 times [2021-07-09 18:38:52,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:52,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918833196] [2021-07-09 18:38:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:52,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:52,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918833196] [2021-07-09 18:38:52,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918833196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:52,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243217142] [2021-07-09 18:38:52,776 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 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 [2021-07-09 18:38:52,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:52,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:38:52,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:53,334 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-09 18:38:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:38:53,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,459 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:53,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:53,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,595 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:38:53,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:53,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:53,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,751 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:38:53,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:53,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,776 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:53,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:53,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,894 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-09 18:38:53,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,907 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:53,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:53,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:53,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:53,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:53,921 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,022 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-09 18:38:54,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:54,029 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-07-09 18:38:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:54,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243217142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:54,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:54,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:38:54,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897038150] [2021-07-09 18:38:54,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:54,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:54,228 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:54,816 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 18:38:55,047 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-09 18:38:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:55,579 INFO L93 Difference]: Finished difference Result 2612 states and 8738 transitions. [2021-07-09 18:38:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:38:55,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:55,584 INFO L225 Difference]: With dead ends: 2612 [2021-07-09 18:38:55,584 INFO L226 Difference]: Without dead ends: 2587 [2021-07-09 18:38:55,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1823.0ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:38:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-07-09 18:38:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2061. [2021-07-09 18:38:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-07-09 18:38:55,611 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-07-09 18:38:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:55,612 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-07-09 18:38:55,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-07-09 18:38:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:55,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:55,614 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:55,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:55,815 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1086187700, now seen corresponding path program 54 times [2021-07-09 18:38:55,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:55,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078873655] [2021-07-09 18:38:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:56,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:56,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078873655] [2021-07-09 18:38:56,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078873655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:56,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146640586] [2021-07-09 18:38:56,272 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 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 [2021-07-09 18:38:56,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:56,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:56,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:56,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,524 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:56,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:56,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,533 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:56,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:56,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,542 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:56,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:56,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,554 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:56,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:56,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,567 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:56,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:56,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:56,581 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:56,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:56,591 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:56,603 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:38:56,618 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,626 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:56,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:56,627 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,636 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:56,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:38:56,637 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:56,651 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,662 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:56,664 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:56,678 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,686 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:56,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:56,687 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,693 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:56,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:56,693 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:56,770 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:38:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:56,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146640586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:56,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:56,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:38:56,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733165734] [2021-07-09 18:38:56,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:56,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:56,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:56,979 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:57,357 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-09 18:38:58,413 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-09 18:38:58,688 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-07-09 18:38:58,871 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-09 18:38:59,159 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:38:59,509 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-09 18:38:59,812 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-07-09 18:38:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:59,872 INFO L93 Difference]: Finished difference Result 2664 states and 8880 transitions. [2021-07-09 18:38:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:59,876 INFO L225 Difference]: With dead ends: 2664 [2021-07-09 18:38:59,876 INFO L226 Difference]: Without dead ends: 2649 [2021-07-09 18:38:59,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3002.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:38:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-07-09 18:38:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2049. [2021-07-09 18:38:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-07-09 18:38:59,905 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-07-09 18:38:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:59,905 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-07-09 18:38:59,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-07-09 18:38:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:59,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:59,908 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:00,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:00,108 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-07-09 18:39:00,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:00,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732214053] [2021-07-09 18:39:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:00,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:00,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732214053] [2021-07-09 18:39:00,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732214053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:00,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108330236] [2021-07-09 18:39:00,479 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 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 [2021-07-09 18:39:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:01,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:01,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:01,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:39:01,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:39:01,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:39:01,052 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:39:01,059 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:39:01,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:39:01,075 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:39:01,083 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:39:01,091 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:39:01,099 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:39:01,108 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:39:01,117 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:39:01,124 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:01,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:39:01,128 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,154 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:39:01,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:39:01,156 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:39:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:01,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108330236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:01,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:01,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:39:01,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935907589] [2021-07-09 18:39:01,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:39:01,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:01,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:39:01,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:39:01,175 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2021-07-09 18:39:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:03,619 INFO L93 Difference]: Finished difference Result 2625 states and 8625 transitions. [2021-07-09 18:39:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:39:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 26 [2021-07-09 18:39:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:03,624 INFO L225 Difference]: With dead ends: 2625 [2021-07-09 18:39:03,624 INFO L226 Difference]: Without dead ends: 2603 [2021-07-09 18:39:03,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2468.6ms TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:39:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-09 18:39:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2047. [2021-07-09 18:39:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.40811339198436) internal successors, (6973), 2046 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 6973 transitions. [2021-07-09 18:39:03,653 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 6973 transitions. Word has length 26 [2021-07-09 18:39:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:03,653 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 6973 transitions. [2021-07-09 18:39:03,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2021-07-09 18:39:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 6973 transitions. [2021-07-09 18:39:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:03,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:03,656 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:03,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-07-09 18:39:03,856 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:03,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-07-09 18:39:03,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:03,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815282924] [2021-07-09 18:39:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:04,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815282924] [2021-07-09 18:39:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815282924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653838148] [2021-07-09 18:39:04,168 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 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 [2021-07-09 18:39:04,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:04,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:04,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:04,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:04,522 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-09 18:39:04,573 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_470], 6=[v_prenex_472, v_prenex_474]} [2021-07-09 18:39:04,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:04,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:39:04,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:04,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-07-09 18:39:04,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,703 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-09 18:39:04,704 INFO L628 ElimStorePlain]: treesize reduction 162, result has 46.2 percent of original size [2021-07-09 18:39:04,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:04,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:39:04,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:04,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:39:04,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:04,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:04,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:04,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:39:04,793 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:04,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:39:04,826 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-07-09 18:39:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:04,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653838148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:04,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:04,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:39:04,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282339649] [2021-07-09 18:39:04,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:04,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:04,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:04,875 INFO L87 Difference]: Start difference. First operand 2047 states and 6973 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:06,363 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:39:06,639 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 18:39:06,897 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-09 18:39:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:07,029 INFO L93 Difference]: Finished difference Result 2959 states and 9765 transitions. [2021-07-09 18:39:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:39:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:07,034 INFO L225 Difference]: With dead ends: 2959 [2021-07-09 18:39:07,034 INFO L226 Difference]: Without dead ends: 2919 [2021-07-09 18:39:07,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2178.4ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:39:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-07-09 18:39:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2063. [2021-07-09 18:39:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.41270611057226) internal successors, (7037), 2062 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7037 transitions. [2021-07-09 18:39:07,064 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7037 transitions. Word has length 26 [2021-07-09 18:39:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:07,064 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7037 transitions. [2021-07-09 18:39:07,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7037 transitions. [2021-07-09 18:39:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:07,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:07,067 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:07,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:07,267 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-07-09 18:39:07,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:07,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672237026] [2021-07-09 18:39:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:07,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672237026] [2021-07-09 18:39:07,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672237026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952002517] [2021-07-09 18:39:07,544 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 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 [2021-07-09 18:39:07,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:07,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:07,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:07,967 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-09 18:39:08,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:08,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 51 [2021-07-09 18:39:08,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,220 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-09 18:39:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 39 [2021-07-09 18:39:08,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:09,436 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2021-07-09 18:39:09,437 INFO L628 ElimStorePlain]: treesize reduction 42, result has 95.5 percent of original size [2021-07-09 18:39:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:09,500 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-07-09 18:39:09,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:39:09,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:09,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:09,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:09,562 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-09 18:39:09,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 47 [2021-07-09 18:39:09,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:10,834 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 188 DAG size of output: 183 [2021-07-09 18:39:10,835 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.4 percent of original size [2021-07-09 18:39:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:10,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:10,883 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-09 18:39:10,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:39:10,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:10,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:10,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:10,928 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-09 18:39:10,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:39:10,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,031 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2021-07-09 18:39:12,032 INFO L628 ElimStorePlain]: treesize reduction 44, result has 94.9 percent of original size [2021-07-09 18:39:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,079 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-07-09 18:39:12,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:39:12,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,119 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-07-09 18:39:12,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:39:12,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,635 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-09 18:39:12,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,690 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-09 18:39:12,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 39 [2021-07-09 18:39:12,695 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,741 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-09 18:39:12,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-07-09 18:39:12,746 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:13,694 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2021-07-09 18:39:13,695 INFO L628 ElimStorePlain]: treesize reduction 18, result has 97.7 percent of original size [2021-07-09 18:39:13,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:13,748 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-07-09 18:39:13,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:39:13,756 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:13,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:13,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-09 18:39:13,800 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,239 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-09 18:39:14,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:14,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,285 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-09 18:39:14,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:39:14,288 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,327 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-07-09 18:39:14,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:39:14,329 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:15,176 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-07-09 18:39:15,177 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.4 percent of original size [2021-07-09 18:39:15,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:15,231 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-07-09 18:39:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 43 [2021-07-09 18:39:15,235 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:15,275 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-07-09 18:39:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 36 [2021-07-09 18:39:15,287 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:15,699 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:39:15,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:15,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-09 18:39:15,745 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:945, output treesize:1467 [2021-07-09 18:39:16,222 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-07-09 18:39:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:16,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952002517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:16,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:16,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:39:16,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51980715] [2021-07-09 18:39:16,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:39:16,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:16,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:39:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:39:16,339 INFO L87 Difference]: Start difference. First operand 2063 states and 7037 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 18:39:16,952 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2021-07-09 18:39:17,186 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2021-07-09 18:39:17,609 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-07-09 18:39:18,110 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-09 18:39:18,280 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-07-09 18:39:18,612 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-07-09 18:39:19,082 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 18:39:19,323 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-09 18:39:19,520 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-07-09 18:39:19,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:19,597 INFO L93 Difference]: Finished difference Result 2842 states and 9205 transitions. [2021-07-09 18:39:19,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:39:19,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 26 [2021-07-09 18:39:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:19,602 INFO L225 Difference]: With dead ends: 2842 [2021-07-09 18:39:19,602 INFO L226 Difference]: Without dead ends: 2798 [2021-07-09 18:39:19,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3884.7ms TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:39:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-07-09 18:39:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2136. [2021-07-09 18:39:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.406088992974239) internal successors, (7272), 2135 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7272 transitions. [2021-07-09 18:39:19,638 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7272 transitions. Word has length 26 [2021-07-09 18:39:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:19,638 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 7272 transitions. [2021-07-09 18:39:19,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 18:39:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7272 transitions. [2021-07-09 18:39:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:19,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:19,641 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:19,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:19,842 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:19,842 INFO L82 PathProgramCache]: Analyzing trace with hash -550813574, now seen corresponding path program 55 times [2021-07-09 18:39:19,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:19,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263029783] [2021-07-09 18:39:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:20,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:20,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263029783] [2021-07-09 18:39:20,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263029783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:20,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946811429] [2021-07-09 18:39:20,186 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 [2021-07-09 18:39:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:20,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:39:20,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:20,719 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-09 18:39:20,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:20,855 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:39:20,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:39:20,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:20,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:20,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 18:39:20,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,227 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 147 [2021-07-09 18:39:21,228 INFO L628 ElimStorePlain]: treesize reduction 194, result has 64.3 percent of original size [2021-07-09 18:39:21,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,254 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:21,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:39:21,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,403 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-07-09 18:39:21,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,426 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:39:21,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:39:21,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,569 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-07-09 18:39:21,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:21,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,595 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:21,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:39:21,597 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,736 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-07-09 18:39:21,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:21,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,761 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:21,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:39:21,765 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,901 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 18:39:21,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,924 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:39:21,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:21,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:22,056 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 18:39:22,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:22,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:22,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:39:22,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:22,332 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-07-09 18:39:22,333 INFO L628 ElimStorePlain]: treesize reduction 12, result has 95.8 percent of original size [2021-07-09 18:39:22,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:22,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:39:22,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:22,599 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-07-09 18:39:22,599 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-07-09 18:39:22,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:22,619 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:583, output treesize:253 [2021-07-09 18:39:22,817 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 18:39:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:22,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946811429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:22,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:22,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:22,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053566933] [2021-07-09 18:39:22,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:22,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:22,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:22,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:22,934 INFO L87 Difference]: Start difference. First operand 2136 states and 7272 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:24,093 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-09 18:39:24,325 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-09 18:39:24,551 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 18:39:24,982 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-07-09 18:39:25,347 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-09 18:39:25,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:25,403 INFO L93 Difference]: Finished difference Result 3051 states and 10102 transitions. [2021-07-09 18:39:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:39:25,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:25,408 INFO L225 Difference]: With dead ends: 3051 [2021-07-09 18:39:25,409 INFO L226 Difference]: Without dead ends: 3036 [2021-07-09 18:39:25,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2976.1ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:39:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-07-09 18:39:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2138. [2021-07-09 18:39:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.402433317735143) internal successors, (7271), 2137 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7271 transitions. [2021-07-09 18:39:25,444 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7271 transitions. Word has length 26 [2021-07-09 18:39:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:25,444 INFO L482 AbstractCegarLoop]: Abstraction has 2138 states and 7271 transitions. [2021-07-09 18:39:25,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7271 transitions. [2021-07-09 18:39:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:25,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:25,447 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:25,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3761,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:25,647 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:25,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 56 times [2021-07-09 18:39:25,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:25,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604993436] [2021-07-09 18:39:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:26,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:26,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604993436] [2021-07-09 18:39:26,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604993436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:26,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288613867] [2021-07-09 18:39:26,087 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 [2021-07-09 18:39:26,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:26,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:26,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:39:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,313 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:26,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:26,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,322 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:26,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:26,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:26,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:39:26,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,343 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:26,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:26,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,357 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:26,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:26,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:26,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:26,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:26,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:39:26,380 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:26,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:39:26,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:26,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:39:26,408 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,416 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:26,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:39:26,417 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,426 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:26,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:39:26,427 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:26,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:26,441 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,453 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:26,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:39:26,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:26,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:26,468 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,476 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:26,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:39:26,477 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:26,487 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:39:26,488 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:26,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:26,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:26,566 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:39:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:26,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288613867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:26,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:26,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:39:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906054405] [2021-07-09 18:39:26,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:39:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:39:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:39:26,777 INFO L87 Difference]: Start difference. First operand 2138 states and 7271 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:27,095 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-09 18:39:27,931 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 18:39:28,116 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:39:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:28,195 INFO L93 Difference]: Finished difference Result 2900 states and 9631 transitions. [2021-07-09 18:39:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:28,201 INFO L225 Difference]: With dead ends: 2900 [2021-07-09 18:39:28,201 INFO L226 Difference]: Without dead ends: 2875 [2021-07-09 18:39:28,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1711.9ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:39:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-07-09 18:39:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2131. [2021-07-09 18:39:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.3995305164319247) internal successors, (7241), 2130 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7241 transitions. [2021-07-09 18:39:28,231 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7241 transitions. Word has length 26 [2021-07-09 18:39:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:28,231 INFO L482 AbstractCegarLoop]: Abstraction has 2131 states and 7241 transitions. [2021-07-09 18:39:28,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7241 transitions. [2021-07-09 18:39:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:28,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:28,234 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:28,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:28,435 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash 807490168, now seen corresponding path program 57 times [2021-07-09 18:39:28,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:28,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980569623] [2021-07-09 18:39:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:28,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:28,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980569623] [2021-07-09 18:39:28,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980569623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:28,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468951594] [2021-07-09 18:39:28,814 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 [2021-07-09 18:39:28,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:28,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:28,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:39:28,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:29,356 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-09 18:39:29,701 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2021-07-09 18:39:29,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:29,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:29,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:29,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:29,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:29,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:29,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:39:29,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:30,027 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-09 18:39:30,028 INFO L628 ElimStorePlain]: treesize reduction 143, result has 51.5 percent of original size [2021-07-09 18:39:30,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:30,033 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:39:30,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:30,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:30,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:30,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:30,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:30,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:39:30,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:30,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:30,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:30,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:30,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:30,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:30,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:30,175 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:39:30,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:30,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:30,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:39:30,228 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:333, output treesize:51 [2021-07-09 18:39:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:30,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468951594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:30,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:30,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:30,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736669967] [2021-07-09 18:39:30,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:30,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:30,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:30,284 INFO L87 Difference]: Start difference. First operand 2131 states and 7241 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:31,053 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-07-09 18:39:31,433 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 18:39:31,875 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-07-09 18:39:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:31,991 INFO L93 Difference]: Finished difference Result 2671 states and 8927 transitions. [2021-07-09 18:39:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:39:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:31,996 INFO L225 Difference]: With dead ends: 2671 [2021-07-09 18:39:31,996 INFO L226 Difference]: Without dead ends: 2656 [2021-07-09 18:39:31,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2296.2ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:39:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-07-09 18:39:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2119. [2021-07-09 18:39:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.4022662889518416) internal successors, (7206), 2118 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7206 transitions. [2021-07-09 18:39:32,025 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7206 transitions. Word has length 26 [2021-07-09 18:39:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:32,025 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7206 transitions. [2021-07-09 18:39:32,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7206 transitions. [2021-07-09 18:39:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:32,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:32,028 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:32,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-07-09 18:39:32,229 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-07-09 18:39:32,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:32,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386990158] [2021-07-09 18:39:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:32,438 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-07-09 18:39:32,583 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-07-09 18:39:32,796 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-09 18:39:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:32,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:32,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386990158] [2021-07-09 18:39:32,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386990158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:32,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906460814] [2021-07-09 18:39:32,917 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 [2021-07-09 18:39:32,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:32,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:39:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:33,292 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-09 18:39:33,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:33,414 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:33,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:39:33,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:33,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:33,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,562 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:39:33,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:33,576 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:33,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:33,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:33,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:39:33,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,710 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:39:33,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:33,723 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:33,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:33,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:33,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:39:33,736 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,847 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:39:33,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:33,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:33,862 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:33,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:33,874 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:33,976 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-09 18:39:33,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:33,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:33,983 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-07-09 18:39:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:34,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906460814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:34,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:34,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:34,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976321770] [2021-07-09 18:39:34,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:34,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:34,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:34,180 INFO L87 Difference]: Start difference. First operand 2119 states and 7206 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:35,232 INFO L93 Difference]: Finished difference Result 2740 states and 9175 transitions. [2021-07-09 18:39:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:35,237 INFO L225 Difference]: With dead ends: 2740 [2021-07-09 18:39:35,237 INFO L226 Difference]: Without dead ends: 2725 [2021-07-09 18:39:35,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1726.9ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:39:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-07-09 18:39:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2113. [2021-07-09 18:39:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.403409090909091) internal successors, (7188), 2112 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7188 transitions. [2021-07-09 18:39:35,267 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7188 transitions. Word has length 26 [2021-07-09 18:39:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:35,267 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 7188 transitions. [2021-07-09 18:39:35,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7188 transitions. [2021-07-09 18:39:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:35,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:35,270 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:35,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-07-09 18:39:35,471 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1128807410, now seen corresponding path program 64 times [2021-07-09 18:39:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:35,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221451986] [2021-07-09 18:39:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:35,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:35,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221451986] [2021-07-09 18:39:35,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221451986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:35,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458627719] [2021-07-09 18:39:35,784 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 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 [2021-07-09 18:39:35,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:35,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:36,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:39:36,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:39:36,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:39:36,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:39:36,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:39:36,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:39:36,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:39:36,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:39:36,321 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:39:36,328 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:39:36,336 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:39:36,343 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:39:36,350 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:36,358 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:36,365 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:36,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:39:36,370 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,396 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-07-09 18:39:36,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:39:36,398 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:39:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:36,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458627719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:36,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:36,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:39:36,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082541945] [2021-07-09 18:39:36,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:36,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:36,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:36,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:36,434 INFO L87 Difference]: Start difference. First operand 2113 states and 7188 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:37,981 INFO L93 Difference]: Finished difference Result 2992 states and 9892 transitions. [2021-07-09 18:39:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:39:37,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:37,987 INFO L225 Difference]: With dead ends: 2992 [2021-07-09 18:39:37,987 INFO L226 Difference]: Without dead ends: 2955 [2021-07-09 18:39:37,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1547.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:39:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-07-09 18:39:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2104. [2021-07-09 18:39:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.4013314312886354) internal successors, (7153), 2103 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7153 transitions. [2021-07-09 18:39:38,019 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7153 transitions. Word has length 26 [2021-07-09 18:39:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:38,019 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 7153 transitions. [2021-07-09 18:39:38,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7153 transitions. [2021-07-09 18:39:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:38,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:38,022 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:38,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3871,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:38,223 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-07-09 18:39:38,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:38,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088319165] [2021-07-09 18:39:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:38,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088319165] [2021-07-09 18:39:38,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088319165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097616116] [2021-07-09 18:39:38,265 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 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 [2021-07-09 18:39:38,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:39:38,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:38,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:38,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097616116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:38,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:38,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:39:38,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217362950] [2021-07-09 18:39:38,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:39:38,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:38,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:39:38,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:39:38,392 INFO L87 Difference]: Start difference. First operand 2104 states and 7153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-07-09 18:39:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:39,381 INFO L93 Difference]: Finished difference Result 5069 states and 15729 transitions. [2021-07-09 18:39:39,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:39:39,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-07-09 18:39:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:39,390 INFO L225 Difference]: With dead ends: 5069 [2021-07-09 18:39:39,390 INFO L226 Difference]: Without dead ends: 5069 [2021-07-09 18:39:39,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:39:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-07-09 18:39:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 2297. [2021-07-09 18:39:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.451219512195122) internal successors, (7924), 2296 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7924 transitions. [2021-07-09 18:39:39,443 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7924 transitions. Word has length 28 [2021-07-09 18:39:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:39,444 INFO L482 AbstractCegarLoop]: Abstraction has 2297 states and 7924 transitions. [2021-07-09 18:39:39,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-07-09 18:39:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7924 transitions. [2021-07-09 18:39:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:39,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:39,447 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:39,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:39,648 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:39,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-07-09 18:39:39,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:39,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576853835] [2021-07-09 18:39:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:39,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:39,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576853835] [2021-07-09 18:39:39,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576853835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:39,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620565251] [2021-07-09 18:39:39,693 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 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 [2021-07-09 18:39:39,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:39:39,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:39,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:39,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:39,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620565251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:39,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:39,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:39:39,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089332464] [2021-07-09 18:39:39,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:39:39,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:39:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:39:39,850 INFO L87 Difference]: Start difference. First operand 2297 states and 7924 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-07-09 18:39:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:41,168 INFO L93 Difference]: Finished difference Result 6700 states and 20456 transitions. [2021-07-09 18:39:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:39:41,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-07-09 18:39:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:41,181 INFO L225 Difference]: With dead ends: 6700 [2021-07-09 18:39:41,182 INFO L226 Difference]: Without dead ends: 6700 [2021-07-09 18:39:41,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:39:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-07-09 18:39:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 2308. [2021-07-09 18:39:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.4581707845687037) internal successors, (7978), 2307 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 7978 transitions. [2021-07-09 18:39:41,253 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 7978 transitions. Word has length 28 [2021-07-09 18:39:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:41,253 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 7978 transitions. [2021-07-09 18:39:41,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-07-09 18:39:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 7978 transitions. [2021-07-09 18:39:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:41,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:41,257 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:41,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:41,459 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-07-09 18:39:41,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:41,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206996379] [2021-07-09 18:39:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:41,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:41,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206996379] [2021-07-09 18:39:41,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206996379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:41,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622155423] [2021-07-09 18:39:41,504 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 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 [2021-07-09 18:39:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:41,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:41,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:41,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622155423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:41,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:41,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:39:41,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765365121] [2021-07-09 18:39:41,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:39:41,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:41,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:39:41,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:39:41,659 INFO L87 Difference]: Start difference. First operand 2308 states and 7978 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-07-09 18:39:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:42,915 INFO L93 Difference]: Finished difference Result 6089 states and 18976 transitions. [2021-07-09 18:39:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:39:42,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-07-09 18:39:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:42,930 INFO L225 Difference]: With dead ends: 6089 [2021-07-09 18:39:42,930 INFO L226 Difference]: Without dead ends: 6089 [2021-07-09 18:39:42,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 747.1ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:39:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2021-07-09 18:39:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 2256. [2021-07-09 18:39:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.4350332594235033) internal successors, (7746), 2255 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7746 transitions. [2021-07-09 18:39:42,994 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7746 transitions. Word has length 28 [2021-07-09 18:39:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:42,994 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 7746 transitions. [2021-07-09 18:39:42,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-07-09 18:39:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7746 transitions. [2021-07-09 18:39:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:42,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:42,998 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:43,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-07-09 18:39:43,201 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-07-09 18:39:43,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:43,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921107337] [2021-07-09 18:39:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:43,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:43,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921107337] [2021-07-09 18:39:43,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921107337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:43,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111040755] [2021-07-09 18:39:43,244 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 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 [2021-07-09 18:39:43,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111040755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:43,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:43,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:39:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550064200] [2021-07-09 18:39:43,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:39:43,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:43,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:39:43,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:39:43,371 INFO L87 Difference]: Start difference. First operand 2256 states and 7746 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-09 18:39:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:44,501 INFO L93 Difference]: Finished difference Result 5162 states and 15913 transitions. [2021-07-09 18:39:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:39:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-07-09 18:39:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:44,511 INFO L225 Difference]: With dead ends: 5162 [2021-07-09 18:39:44,512 INFO L226 Difference]: Without dead ends: 5162 [2021-07-09 18:39:44,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:39:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-07-09 18:39:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 2269. [2021-07-09 18:39:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 3.432980599647266) internal successors, (7786), 2268 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 7786 transitions. [2021-07-09 18:39:44,562 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 7786 transitions. Word has length 28 [2021-07-09 18:39:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:44,562 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 7786 transitions. [2021-07-09 18:39:44,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-09 18:39:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 7786 transitions. [2021-07-09 18:39:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:44,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:44,565 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:44,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:44,766 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 65 times [2021-07-09 18:39:44,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:44,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771569901] [2021-07-09 18:39:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:44,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:44,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771569901] [2021-07-09 18:39:44,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771569901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:44,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647795280] [2021-07-09 18:39:44,810 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 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 [2021-07-09 18:39:44,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:39:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:44,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647795280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:44,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:44,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:39:44,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818162895] [2021-07-09 18:39:44,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:44,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:44,929 INFO L87 Difference]: Start difference. First operand 2269 states and 7786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:39:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:45,542 INFO L93 Difference]: Finished difference Result 4589 states and 14330 transitions. [2021-07-09 18:39:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:39:45,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-09 18:39:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:45,551 INFO L225 Difference]: With dead ends: 4589 [2021-07-09 18:39:45,551 INFO L226 Difference]: Without dead ends: 4589 [2021-07-09 18:39:45,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:39:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-07-09 18:39:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2339. [2021-07-09 18:39:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.417023096663815) internal successors, (7989), 2338 states have internal predecessors, (7989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7989 transitions. [2021-07-09 18:39:45,606 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7989 transitions. Word has length 28 [2021-07-09 18:39:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:45,606 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 7989 transitions. [2021-07-09 18:39:45,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:39:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7989 transitions. [2021-07-09 18:39:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:45,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:45,609 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:45,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3965 [2021-07-09 18:39:45,810 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-07-09 18:39:45,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:45,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972561385] [2021-07-09 18:39:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:45,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972561385] [2021-07-09 18:39:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972561385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662726090] [2021-07-09 18:39:45,840 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 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 [2021-07-09 18:39:45,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:45,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:45,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:45,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662726090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:45,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:45,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:39:45,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061630083] [2021-07-09 18:39:45,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:39:45,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:45,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:39:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:39:45,933 INFO L87 Difference]: Start difference. First operand 2339 states and 7989 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-09 18:39:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:46,116 INFO L93 Difference]: Finished difference Result 3853 states and 12551 transitions. [2021-07-09 18:39:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 28 [2021-07-09 18:39:46,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:46,123 INFO L225 Difference]: With dead ends: 3853 [2021-07-09 18:39:46,123 INFO L226 Difference]: Without dead ends: 3829 [2021-07-09 18:39:46,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-07-09 18:39:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 2701. [2021-07-09 18:39:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 3.4851851851851854) internal successors, (9410), 2700 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 9410 transitions. [2021-07-09 18:39:46,168 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 9410 transitions. Word has length 28 [2021-07-09 18:39:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:46,168 INFO L482 AbstractCegarLoop]: Abstraction has 2701 states and 9410 transitions. [2021-07-09 18:39:46,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-09 18:39:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 9410 transitions. [2021-07-09 18:39:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:46,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:46,172 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:46,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3966 [2021-07-09 18:39:46,373 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-07-09 18:39:46,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:46,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944825634] [2021-07-09 18:39:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:46,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:46,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944825634] [2021-07-09 18:39:46,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944825634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:46,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602673446] [2021-07-09 18:39:46,409 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 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 [2021-07-09 18:39:46,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:46,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:46,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:46,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:46,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602673446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:46,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:46,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:39:46,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512081467] [2021-07-09 18:39:46,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:46,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:46,514 INFO L87 Difference]: Start difference. First operand 2701 states and 9410 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:39:47,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:47,127 INFO L93 Difference]: Finished difference Result 4524 states and 14456 transitions. [2021-07-09 18:39:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:39:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:39:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:47,135 INFO L225 Difference]: With dead ends: 4524 [2021-07-09 18:39:47,136 INFO L226 Difference]: Without dead ends: 4477 [2021-07-09 18:39:47,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:39:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2021-07-09 18:39:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2866. [2021-07-09 18:39:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 3.505759162303665) internal successors, (10044), 2865 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 10044 transitions. [2021-07-09 18:39:47,215 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 10044 transitions. Word has length 28 [2021-07-09 18:39:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:47,215 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 10044 transitions. [2021-07-09 18:39:47,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:39:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 10044 transitions. [2021-07-09 18:39:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:47,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:47,220 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:47,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3967 [2021-07-09 18:39:47,420 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-07-09 18:39:47,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:47,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58665357] [2021-07-09 18:39:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:47,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:47,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58665357] [2021-07-09 18:39:47,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58665357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:47,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822258598] [2021-07-09 18:39:47,455 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 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 [2021-07-09 18:39:47,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:39:47,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:47,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822258598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:47,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:47,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:47,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122906560] [2021-07-09 18:39:47,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:47,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:47,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:47,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:47,573 INFO L87 Difference]: Start difference. First operand 2866 states and 10044 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:39:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:48,283 INFO L93 Difference]: Finished difference Result 4809 states and 15088 transitions. [2021-07-09 18:39:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:39:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-09 18:39:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:48,293 INFO L225 Difference]: With dead ends: 4809 [2021-07-09 18:39:48,294 INFO L226 Difference]: Without dead ends: 4783 [2021-07-09 18:39:48,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:39:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-07-09 18:39:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2887. [2021-07-09 18:39:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.512127512127512) internal successors, (10136), 2886 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10136 transitions. [2021-07-09 18:39:48,353 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10136 transitions. Word has length 28 [2021-07-09 18:39:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:48,353 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10136 transitions. [2021-07-09 18:39:48,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:39:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10136 transitions. [2021-07-09 18:39:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:48,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:48,358 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:48,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3968,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:48,558 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:48,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-07-09 18:39:48,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:48,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652167612] [2021-07-09 18:39:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:48,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:48,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652167612] [2021-07-09 18:39:48,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652167612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:48,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110615917] [2021-07-09 18:39:48,593 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 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 [2021-07-09 18:39:48,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:39:48,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:48,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:48,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110615917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:48,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:48,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102170950] [2021-07-09 18:39:48,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:48,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:48,708 INFO L87 Difference]: Start difference. First operand 2887 states and 10136 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:39:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:49,434 INFO L93 Difference]: Finished difference Result 4801 states and 15088 transitions. [2021-07-09 18:39:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:39:49,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-09 18:39:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:49,443 INFO L225 Difference]: With dead ends: 4801 [2021-07-09 18:39:49,443 INFO L226 Difference]: Without dead ends: 4786 [2021-07-09 18:39:49,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:39:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-07-09 18:39:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2887. [2021-07-09 18:39:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.5076230076230077) internal successors, (10123), 2886 states have internal predecessors, (10123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10123 transitions. [2021-07-09 18:39:49,509 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10123 transitions. Word has length 28 [2021-07-09 18:39:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:49,509 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10123 transitions. [2021-07-09 18:39:49,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:39:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10123 transitions. [2021-07-09 18:39:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:49,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:49,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:49,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-07-09 18:39:49,715 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-07-09 18:39:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:49,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089300736] [2021-07-09 18:39:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:49,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:49,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089300736] [2021-07-09 18:39:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089300736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:49,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134249438] [2021-07-09 18:39:49,749 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 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 [2021-07-09 18:39:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:49,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:49,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:49,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134249438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:49,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:49,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:49,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92371869] [2021-07-09 18:39:49,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:49,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:49,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:49,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:49,844 INFO L87 Difference]: Start difference. First operand 2887 states and 10123 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) [2021-07-09 18:39:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:50,431 INFO L93 Difference]: Finished difference Result 5555 states and 17807 transitions. [2021-07-09 18:39:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:39:50,431 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 28 [2021-07-09 18:39:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:50,441 INFO L225 Difference]: With dead ends: 5555 [2021-07-09 18:39:50,442 INFO L226 Difference]: Without dead ends: 5508 [2021-07-09 18:39:50,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:39:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-07-09 18:39:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3028. [2021-07-09 18:39:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 3.5500495540138752) internal successors, (10746), 3027 states have internal predecessors, (10746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 10746 transitions. [2021-07-09 18:39:50,517 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 10746 transitions. Word has length 28 [2021-07-09 18:39:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:50,517 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 10746 transitions. [2021-07-09 18:39:50,517 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) [2021-07-09 18:39:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 10746 transitions. [2021-07-09 18:39:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:50,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:50,522 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:50,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:50,722 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:50,723 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-07-09 18:39:50,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:50,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262867499] [2021-07-09 18:39:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:50,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:50,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262867499] [2021-07-09 18:39:50,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262867499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:50,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559899181] [2021-07-09 18:39:50,757 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 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 [2021-07-09 18:39:50,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:50,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:50,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559899181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:50,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:50,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:39:50,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382145584] [2021-07-09 18:39:50,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:39:50,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:39:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:39:50,842 INFO L87 Difference]: Start difference. First operand 3028 states and 10746 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-07-09 18:39:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:51,026 INFO L93 Difference]: Finished difference Result 4339 states and 14289 transitions. [2021-07-09 18:39:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-07-09 18:39:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:51,034 INFO L225 Difference]: With dead ends: 4339 [2021-07-09 18:39:51,034 INFO L226 Difference]: Without dead ends: 4339 [2021-07-09 18:39:51,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:39:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-07-09 18:39:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 2863. [2021-07-09 18:39:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 3.5195667365478687) internal successors, (10073), 2862 states have internal predecessors, (10073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 10073 transitions. [2021-07-09 18:39:51,083 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 10073 transitions. Word has length 28 [2021-07-09 18:39:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:51,083 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 10073 transitions. [2021-07-09 18:39:51,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-07-09 18:39:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 10073 transitions. [2021-07-09 18:39:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:51,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:51,087 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:51,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:51,288 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-07-09 18:39:51,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:51,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438953336] [2021-07-09 18:39:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:51,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:51,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438953336] [2021-07-09 18:39:51,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438953336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:51,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582245416] [2021-07-09 18:39:51,342 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 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 [2021-07-09 18:39:51,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:39:51,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:51,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582245416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:51,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:51,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:51,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925242821] [2021-07-09 18:39:51,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:51,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:51,451 INFO L87 Difference]: Start difference. First operand 2863 states and 10073 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:39:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:52,146 INFO L93 Difference]: Finished difference Result 6209 states and 19661 transitions. [2021-07-09 18:39:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:39:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:39:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:52,159 INFO L225 Difference]: With dead ends: 6209 [2021-07-09 18:39:52,159 INFO L226 Difference]: Without dead ends: 6209 [2021-07-09 18:39:52,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:39:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-07-09 18:39:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 2881. [2021-07-09 18:39:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.5194444444444444) internal successors, (10136), 2880 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10136 transitions. [2021-07-09 18:39:52,233 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10136 transitions. Word has length 28 [2021-07-09 18:39:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:52,233 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10136 transitions. [2021-07-09 18:39:52,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:39:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10136 transitions. [2021-07-09 18:39:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:52,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:52,238 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:52,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:52,438 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:52,439 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-07-09 18:39:52,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:52,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481238986] [2021-07-09 18:39:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:52,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:52,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481238986] [2021-07-09 18:39:52,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481238986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:52,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174793512] [2021-07-09 18:39:52,476 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 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 [2021-07-09 18:39:52,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:52,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:52,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:52,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174793512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:52,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:52,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:52,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807086201] [2021-07-09 18:39:52,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:52,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:52,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:52,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:52,577 INFO L87 Difference]: Start difference. First operand 2881 states and 10136 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:39:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:53,411 INFO L93 Difference]: Finished difference Result 6471 states and 20458 transitions. [2021-07-09 18:39:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:39:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:39:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:53,424 INFO L225 Difference]: With dead ends: 6471 [2021-07-09 18:39:53,424 INFO L226 Difference]: Without dead ends: 6471 [2021-07-09 18:39:53,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:39:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-07-09 18:39:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 2975. [2021-07-09 18:39:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.511432414256893) internal successors, (10443), 2974 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10443 transitions. [2021-07-09 18:39:53,502 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10443 transitions. Word has length 28 [2021-07-09 18:39:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:53,503 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 10443 transitions. [2021-07-09 18:39:53,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:39:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10443 transitions. [2021-07-09 18:39:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:53,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:53,507 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:53,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:53,707 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:53,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:53,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-07-09 18:39:53,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:53,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620687980] [2021-07-09 18:39:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:53,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:53,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620687980] [2021-07-09 18:39:53,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620687980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:53,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410031619] [2021-07-09 18:39:53,743 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 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 [2021-07-09 18:39:53,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:53,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:53,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:53,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:53,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410031619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:53,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:53,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:53,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801766366] [2021-07-09 18:39:53,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:53,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:53,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:53,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:53,847 INFO L87 Difference]: Start difference. First operand 2975 states and 10443 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) [2021-07-09 18:39:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:54,483 INFO L93 Difference]: Finished difference Result 6662 states and 21078 transitions. [2021-07-09 18:39:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:39:54,484 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 28 [2021-07-09 18:39:54,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:54,496 INFO L225 Difference]: With dead ends: 6662 [2021-07-09 18:39:54,496 INFO L226 Difference]: Without dead ends: 6626 [2021-07-09 18:39:54,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:39:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-07-09 18:39:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 3377. [2021-07-09 18:39:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.5390995260663507) internal successors, (11948), 3376 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 11948 transitions. [2021-07-09 18:39:54,594 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 11948 transitions. Word has length 28 [2021-07-09 18:39:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:54,594 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 11948 transitions. [2021-07-09 18:39:54,594 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) [2021-07-09 18:39:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 11948 transitions. [2021-07-09 18:39:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:54,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:54,599 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:54,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:54,800 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-07-09 18:39:54,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:54,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495424650] [2021-07-09 18:39:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:54,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:54,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495424650] [2021-07-09 18:39:54,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495424650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:54,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993364897] [2021-07-09 18:39:54,834 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 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 [2021-07-09 18:39:54,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:39:54,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:54,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:54,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:54,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993364897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:54,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:54,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:54,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096425976] [2021-07-09 18:39:54,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:54,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:54,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:54,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:54,933 INFO L87 Difference]: Start difference. First operand 3377 states and 11948 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) [2021-07-09 18:39:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:55,557 INFO L93 Difference]: Finished difference Result 6820 states and 21509 transitions. [2021-07-09 18:39:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:39:55,557 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 28 [2021-07-09 18:39:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:55,571 INFO L225 Difference]: With dead ends: 6820 [2021-07-09 18:39:55,571 INFO L226 Difference]: Without dead ends: 6820 [2021-07-09 18:39:55,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:39:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6820 states. [2021-07-09 18:39:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6820 to 3088. [2021-07-09 18:39:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 3.498542274052478) internal successors, (10800), 3087 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 10800 transitions. [2021-07-09 18:39:55,656 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 10800 transitions. Word has length 28 [2021-07-09 18:39:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:55,656 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 10800 transitions. [2021-07-09 18:39:55,656 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) [2021-07-09 18:39:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 10800 transitions. [2021-07-09 18:39:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:55,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:55,662 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:55,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3975 [2021-07-09 18:39:55,862 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-07-09 18:39:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:55,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292013624] [2021-07-09 18:39:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:55,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:55,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292013624] [2021-07-09 18:39:55,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292013624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:55,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967324721] [2021-07-09 18:39:55,898 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 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 [2021-07-09 18:39:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967324721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:55,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:55,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:55,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853486645] [2021-07-09 18:39:55,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:55,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:55,992 INFO L87 Difference]: Start difference. First operand 3088 states and 10800 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:39:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:56,722 INFO L93 Difference]: Finished difference Result 5973 states and 19224 transitions. [2021-07-09 18:39:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:39:56,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:39:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:56,734 INFO L225 Difference]: With dead ends: 5973 [2021-07-09 18:39:56,734 INFO L226 Difference]: Without dead ends: 5969 [2021-07-09 18:39:56,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 406.0ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:39:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-07-09 18:39:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 2848. [2021-07-09 18:39:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 3.523709167544784) internal successors, (10032), 2847 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 10032 transitions. [2021-07-09 18:39:56,802 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 10032 transitions. Word has length 28 [2021-07-09 18:39:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:56,802 INFO L482 AbstractCegarLoop]: Abstraction has 2848 states and 10032 transitions. [2021-07-09 18:39:56,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:39:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 10032 transitions. [2021-07-09 18:39:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:56,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:56,806 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:57,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:57,007 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-07-09 18:39:57,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:57,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093874017] [2021-07-09 18:39:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:57,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093874017] [2021-07-09 18:39:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093874017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:57,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865726898] [2021-07-09 18:39:57,044 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 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 [2021-07-09 18:39:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:57,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865726898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:57,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:57,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:57,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258929555] [2021-07-09 18:39:57,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:57,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:57,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:57,167 INFO L87 Difference]: Start difference. First operand 2848 states and 10032 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-07-09 18:39:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:58,247 INFO L93 Difference]: Finished difference Result 9218 states and 30019 transitions. [2021-07-09 18:39:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:39:58,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-07-09 18:39:58,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:58,264 INFO L225 Difference]: With dead ends: 9218 [2021-07-09 18:39:58,264 INFO L226 Difference]: Without dead ends: 9218 [2021-07-09 18:39:58,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:39:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-07-09 18:39:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 3024. [2021-07-09 18:39:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3023 states have (on average 3.595765795567317) internal successors, (10870), 3023 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 10870 transitions. [2021-07-09 18:39:58,356 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 10870 transitions. Word has length 28 [2021-07-09 18:39:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:58,356 INFO L482 AbstractCegarLoop]: Abstraction has 3024 states and 10870 transitions. [2021-07-09 18:39:58,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-07-09 18:39:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 10870 transitions. [2021-07-09 18:39:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:58,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:58,361 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:58,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3977 [2021-07-09 18:39:58,562 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:58,562 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-07-09 18:39:58,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:58,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318041834] [2021-07-09 18:39:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:58,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318041834] [2021-07-09 18:39:58,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318041834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180994163] [2021-07-09 18:39:58,597 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 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 [2021-07-09 18:39:58,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:39:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:58,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:58,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180994163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:58,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:58,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083888859] [2021-07-09 18:39:58,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:58,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:58,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:58,723 INFO L87 Difference]: Start difference. First operand 3024 states and 10870 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-07-09 18:39:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:59,794 INFO L93 Difference]: Finished difference Result 9047 states and 29554 transitions. [2021-07-09 18:39:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:39:59,794 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-07-09 18:39:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:59,813 INFO L225 Difference]: With dead ends: 9047 [2021-07-09 18:39:59,814 INFO L226 Difference]: Without dead ends: 9047 [2021-07-09 18:39:59,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:39:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-07-09 18:39:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 2996. [2021-07-09 18:39:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2995 states have (on average 3.579632721202003) internal successors, (10721), 2995 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 10721 transitions. [2021-07-09 18:39:59,922 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 10721 transitions. Word has length 28 [2021-07-09 18:39:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:59,923 INFO L482 AbstractCegarLoop]: Abstraction has 2996 states and 10721 transitions. [2021-07-09 18:39:59,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-07-09 18:39:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 10721 transitions. [2021-07-09 18:39:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:59,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:59,927 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:00,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3978,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:00,127 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-07-09 18:40:00,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:00,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679192593] [2021-07-09 18:40:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:00,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679192593] [2021-07-09 18:40:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679192593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105002527] [2021-07-09 18:40:00,162 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 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 [2021-07-09 18:40:00,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:00,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:00,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:00,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105002527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:00,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:00,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:40:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735499179] [2021-07-09 18:40:00,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:00,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:00,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:00,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:00,275 INFO L87 Difference]: Start difference. First operand 2996 states and 10721 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-07-09 18:40:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:01,260 INFO L93 Difference]: Finished difference Result 8494 states and 26829 transitions. [2021-07-09 18:40:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:40:01,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-07-09 18:40:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:01,283 INFO L225 Difference]: With dead ends: 8494 [2021-07-09 18:40:01,283 INFO L226 Difference]: Without dead ends: 8494 [2021-07-09 18:40:01,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:40:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2021-07-09 18:40:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 3016. [2021-07-09 18:40:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 3.5830845771144277) internal successors, (10803), 3015 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 10803 transitions. [2021-07-09 18:40:01,420 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 10803 transitions. Word has length 28 [2021-07-09 18:40:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:01,420 INFO L482 AbstractCegarLoop]: Abstraction has 3016 states and 10803 transitions. [2021-07-09 18:40:01,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-07-09 18:40:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 10803 transitions. [2021-07-09 18:40:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:01,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:01,426 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:01,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3979 [2021-07-09 18:40:01,649 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-07-09 18:40:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:01,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325923127] [2021-07-09 18:40:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:01,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:01,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325923127] [2021-07-09 18:40:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325923127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:01,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146953435] [2021-07-09 18:40:01,685 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 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 [2021-07-09 18:40:01,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:40:01,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:01,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:01,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146953435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:01,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:01,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:40:01,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19489955] [2021-07-09 18:40:01,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:01,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:01,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:01,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:01,791 INFO L87 Difference]: Start difference. First operand 3016 states and 10803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-07-09 18:40:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:02,729 INFO L93 Difference]: Finished difference Result 8003 states and 25641 transitions. [2021-07-09 18:40:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:40:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-07-09 18:40:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:02,751 INFO L225 Difference]: With dead ends: 8003 [2021-07-09 18:40:02,752 INFO L226 Difference]: Without dead ends: 7995 [2021-07-09 18:40:02,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:40:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-07-09 18:40:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 2998. [2021-07-09 18:40:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.578912245578912) internal successors, (10726), 2997 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 10726 transitions. [2021-07-09 18:40:02,841 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 10726 transitions. Word has length 28 [2021-07-09 18:40:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:02,842 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 10726 transitions. [2021-07-09 18:40:02,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-07-09 18:40:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 10726 transitions. [2021-07-09 18:40:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:02,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:02,846 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:03,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-07-09 18:40:03,047 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-07-09 18:40:03,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:03,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656260277] [2021-07-09 18:40:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:03,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:03,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656260277] [2021-07-09 18:40:03,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656260277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:03,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381894046] [2021-07-09 18:40:03,087 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 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 [2021-07-09 18:40:03,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:40:03,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:03,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:03,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:03,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381894046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:03,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:03,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:03,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183348030] [2021-07-09 18:40:03,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:03,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:03,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:03,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:03,211 INFO L87 Difference]: Start difference. First operand 2998 states and 10726 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:40:04,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:04,227 INFO L93 Difference]: Finished difference Result 7921 states and 25395 transitions. [2021-07-09 18:40:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:40:04,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-09 18:40:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:04,247 INFO L225 Difference]: With dead ends: 7921 [2021-07-09 18:40:04,247 INFO L226 Difference]: Without dead ends: 7921 [2021-07-09 18:40:04,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:40:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-07-09 18:40:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 3014. [2021-07-09 18:40:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5811483571191505) internal successors, (10790), 3013 states have internal predecessors, (10790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10790 transitions. [2021-07-09 18:40:04,362 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10790 transitions. Word has length 28 [2021-07-09 18:40:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:04,362 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10790 transitions. [2021-07-09 18:40:04,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:40:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10790 transitions. [2021-07-09 18:40:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:04,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:04,367 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:04,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:04,568 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-07-09 18:40:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:04,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179274416] [2021-07-09 18:40:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:04,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179274416] [2021-07-09 18:40:04,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179274416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492999368] [2021-07-09 18:40:04,604 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 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 [2021-07-09 18:40:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:04,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492999368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:04,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:04,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:04,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175582320] [2021-07-09 18:40:04,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:04,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:04,723 INFO L87 Difference]: Start difference. First operand 3014 states and 10790 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:40:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:05,738 INFO L93 Difference]: Finished difference Result 7589 states and 24611 transitions. [2021-07-09 18:40:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:40:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-09 18:40:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:05,758 INFO L225 Difference]: With dead ends: 7589 [2021-07-09 18:40:05,758 INFO L226 Difference]: Without dead ends: 7581 [2021-07-09 18:40:05,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:40:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-07-09 18:40:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 2771. [2021-07-09 18:40:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 3.4974729241877256) internal successors, (9688), 2770 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 9688 transitions. [2021-07-09 18:40:05,871 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 9688 transitions. Word has length 28 [2021-07-09 18:40:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:05,871 INFO L482 AbstractCegarLoop]: Abstraction has 2771 states and 9688 transitions. [2021-07-09 18:40:05,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:40:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 9688 transitions. [2021-07-09 18:40:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:05,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:05,875 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:06,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3982 [2021-07-09 18:40:06,076 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:06,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-07-09 18:40:06,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:06,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53389748] [2021-07-09 18:40:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:06,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:06,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53389748] [2021-07-09 18:40:06,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53389748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:06,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623607225] [2021-07-09 18:40:06,113 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 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 [2021-07-09 18:40:06,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:06,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:06,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:06,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623607225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:06,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:06,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685770671] [2021-07-09 18:40:06,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:06,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:06,235 INFO L87 Difference]: Start difference. First operand 2771 states and 9688 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:40:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:07,138 INFO L93 Difference]: Finished difference Result 5790 states and 18502 transitions. [2021-07-09 18:40:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:40:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-09 18:40:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:07,150 INFO L225 Difference]: With dead ends: 5790 [2021-07-09 18:40:07,150 INFO L226 Difference]: Without dead ends: 5790 [2021-07-09 18:40:07,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:40:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2021-07-09 18:40:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 2783. [2021-07-09 18:40:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.4960460100647017) internal successors, (9726), 2782 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 9726 transitions. [2021-07-09 18:40:07,219 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 9726 transitions. Word has length 28 [2021-07-09 18:40:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:07,219 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 9726 transitions. [2021-07-09 18:40:07,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:40:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 9726 transitions. [2021-07-09 18:40:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:07,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:07,224 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:07,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:07,425 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:07,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:07,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-07-09 18:40:07,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:07,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533739340] [2021-07-09 18:40:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:07,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:07,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533739340] [2021-07-09 18:40:07,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533739340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:07,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192121953] [2021-07-09 18:40:07,463 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 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 [2021-07-09 18:40:07,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:07,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:07,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:07,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192121953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:07,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:07,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:07,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906890954] [2021-07-09 18:40:07,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:07,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:07,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:07,604 INFO L87 Difference]: Start difference. First operand 2783 states and 9726 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) [2021-07-09 18:40:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:08,710 INFO L93 Difference]: Finished difference Result 6569 states and 20497 transitions. [2021-07-09 18:40:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:40:08,711 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 28 [2021-07-09 18:40:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:08,726 INFO L225 Difference]: With dead ends: 6569 [2021-07-09 18:40:08,726 INFO L226 Difference]: Without dead ends: 6569 [2021-07-09 18:40:08,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:40:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-07-09 18:40:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 2849. [2021-07-09 18:40:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.4912219101123596) internal successors, (9943), 2848 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9943 transitions. [2021-07-09 18:40:08,823 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9943 transitions. Word has length 28 [2021-07-09 18:40:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:08,823 INFO L482 AbstractCegarLoop]: Abstraction has 2849 states and 9943 transitions. [2021-07-09 18:40:08,823 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) [2021-07-09 18:40:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9943 transitions. [2021-07-09 18:40:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:08,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:08,827 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:09,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:09,028 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:09,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-07-09 18:40:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:09,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669202873] [2021-07-09 18:40:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:09,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:09,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669202873] [2021-07-09 18:40:09,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669202873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:09,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723991853] [2021-07-09 18:40:09,070 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 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 [2021-07-09 18:40:09,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:09,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:09,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723991853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:09,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:09,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130000384] [2021-07-09 18:40:09,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:09,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:09,200 INFO L87 Difference]: Start difference. First operand 2849 states and 9943 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) [2021-07-09 18:40:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:10,258 INFO L93 Difference]: Finished difference Result 6132 states and 19351 transitions. [2021-07-09 18:40:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:40:10,258 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 28 [2021-07-09 18:40:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:10,272 INFO L225 Difference]: With dead ends: 6132 [2021-07-09 18:40:10,272 INFO L226 Difference]: Without dead ends: 6128 [2021-07-09 18:40:10,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:40:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-07-09 18:40:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 2775. [2021-07-09 18:40:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4870223503965394) internal successors, (9673), 2774 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9673 transitions. [2021-07-09 18:40:10,350 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9673 transitions. Word has length 28 [2021-07-09 18:40:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:10,350 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9673 transitions. [2021-07-09 18:40:10,350 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) [2021-07-09 18:40:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9673 transitions. [2021-07-09 18:40:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:10,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:10,354 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:10,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:10,555 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 66 times [2021-07-09 18:40:10,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:10,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303196895] [2021-07-09 18:40:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:10,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:10,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303196895] [2021-07-09 18:40:10,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303196895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:10,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160574866] [2021-07-09 18:40:10,598 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 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 [2021-07-09 18:40:10,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:10,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:10,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:10,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:10,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160574866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:10,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:10,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:10,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758273615] [2021-07-09 18:40:10,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:10,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:10,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:10,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:10,703 INFO L87 Difference]: Start difference. First operand 2775 states and 9673 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) [2021-07-09 18:40:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:11,307 INFO L93 Difference]: Finished difference Result 5268 states and 16907 transitions. [2021-07-09 18:40:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:40:11,307 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 28 [2021-07-09 18:40:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:11,321 INFO L225 Difference]: With dead ends: 5268 [2021-07-09 18:40:11,321 INFO L226 Difference]: Without dead ends: 5268 [2021-07-09 18:40:11,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:40:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-07-09 18:40:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 2775. [2021-07-09 18:40:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4891852919971162) internal successors, (9679), 2774 states have internal predecessors, (9679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9679 transitions. [2021-07-09 18:40:11,404 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9679 transitions. Word has length 28 [2021-07-09 18:40:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:11,404 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9679 transitions. [2021-07-09 18:40:11,405 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) [2021-07-09 18:40:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9679 transitions. [2021-07-09 18:40:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:11,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:11,410 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:11,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:11,625 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 67 times [2021-07-09 18:40:11,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:11,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791081294] [2021-07-09 18:40:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:11,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791081294] [2021-07-09 18:40:11,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791081294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386418902] [2021-07-09 18:40:11,669 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 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 [2021-07-09 18:40:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:11,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386418902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:11,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:11,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:11,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776505885] [2021-07-09 18:40:11,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:11,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:11,774 INFO L87 Difference]: Start difference. First operand 2775 states and 9679 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) [2021-07-09 18:40:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:12,574 INFO L93 Difference]: Finished difference Result 5584 states and 17812 transitions. [2021-07-09 18:40:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:12,574 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 28 [2021-07-09 18:40:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:12,586 INFO L225 Difference]: With dead ends: 5584 [2021-07-09 18:40:12,586 INFO L226 Difference]: Without dead ends: 5584 [2021-07-09 18:40:12,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:40:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-07-09 18:40:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 2766. [2021-07-09 18:40:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 3.489330922242315) internal successors, (9648), 2765 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 9648 transitions. [2021-07-09 18:40:12,675 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 9648 transitions. Word has length 28 [2021-07-09 18:40:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:12,675 INFO L482 AbstractCegarLoop]: Abstraction has 2766 states and 9648 transitions. [2021-07-09 18:40:12,675 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) [2021-07-09 18:40:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 9648 transitions. [2021-07-09 18:40:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:12,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:12,680 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:12,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3987 [2021-07-09 18:40:12,880 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 68 times [2021-07-09 18:40:12,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:12,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711282042] [2021-07-09 18:40:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:12,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:12,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711282042] [2021-07-09 18:40:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711282042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:12,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947925524] [2021-07-09 18:40:12,922 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 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 [2021-07-09 18:40:12,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:12,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:13,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947925524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:13,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:13,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:13,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603928303] [2021-07-09 18:40:13,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:13,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:13,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:13,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:13,027 INFO L87 Difference]: Start difference. First operand 2766 states and 9648 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) [2021-07-09 18:40:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:13,922 INFO L93 Difference]: Finished difference Result 6079 states and 19142 transitions. [2021-07-09 18:40:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:40:13,923 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 28 [2021-07-09 18:40:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:13,936 INFO L225 Difference]: With dead ends: 6079 [2021-07-09 18:40:13,936 INFO L226 Difference]: Without dead ends: 6079 [2021-07-09 18:40:13,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:40:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2021-07-09 18:40:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 2826. [2021-07-09 18:40:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 3.485309734513274) internal successors, (9846), 2825 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 9846 transitions. [2021-07-09 18:40:14,015 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 9846 transitions. Word has length 28 [2021-07-09 18:40:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:14,015 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 9846 transitions. [2021-07-09 18:40:14,015 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) [2021-07-09 18:40:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 9846 transitions. [2021-07-09 18:40:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:14,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:14,020 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:14,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:14,220 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 69 times [2021-07-09 18:40:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:14,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631349639] [2021-07-09 18:40:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631349639] [2021-07-09 18:40:14,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631349639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424621409] [2021-07-09 18:40:14,256 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 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 [2021-07-09 18:40:14,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:14,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:14,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424621409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:14,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:40:14,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130538486] [2021-07-09 18:40:14,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:14,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:14,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:14,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:14,384 INFO L87 Difference]: Start difference. First operand 2826 states and 9846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-07-09 18:40:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:14,963 INFO L93 Difference]: Finished difference Result 6807 states and 22904 transitions. [2021-07-09 18:40:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:40:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 28 [2021-07-09 18:40:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:14,978 INFO L225 Difference]: With dead ends: 6807 [2021-07-09 18:40:14,978 INFO L226 Difference]: Without dead ends: 6807 [2021-07-09 18:40:14,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:40:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2021-07-09 18:40:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 4024. [2021-07-09 18:40:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 3.6109868257519264) internal successors, (14527), 4023 states have internal predecessors, (14527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 14527 transitions. [2021-07-09 18:40:15,073 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 14527 transitions. Word has length 28 [2021-07-09 18:40:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:15,073 INFO L482 AbstractCegarLoop]: Abstraction has 4024 states and 14527 transitions. [2021-07-09 18:40:15,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-07-09 18:40:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 14527 transitions. [2021-07-09 18:40:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:15,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:15,079 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:15,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-07-09 18:40:15,280 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:15,280 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 70 times [2021-07-09 18:40:15,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:15,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402014546] [2021-07-09 18:40:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:15,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:15,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402014546] [2021-07-09 18:40:15,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402014546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:15,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49297387] [2021-07-09 18:40:15,321 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 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 [2021-07-09 18:40:15,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:15,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:15,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:15,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:15,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49297387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:15,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:15,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:15,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702938787] [2021-07-09 18:40:15,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:15,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:15,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:15,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:15,418 INFO L87 Difference]: Start difference. First operand 4024 states and 14527 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) [2021-07-09 18:40:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:16,205 INFO L93 Difference]: Finished difference Result 7353 states and 24861 transitions. [2021-07-09 18:40:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:40:16,205 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 28 [2021-07-09 18:40:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:16,221 INFO L225 Difference]: With dead ends: 7353 [2021-07-09 18:40:16,222 INFO L226 Difference]: Without dead ends: 7349 [2021-07-09 18:40:16,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 470.6ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:40:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-07-09 18:40:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 3916. [2021-07-09 18:40:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 3.6206896551724137) internal successors, (14175), 3915 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 14175 transitions. [2021-07-09 18:40:16,340 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 14175 transitions. Word has length 28 [2021-07-09 18:40:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:16,340 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 14175 transitions. [2021-07-09 18:40:16,340 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) [2021-07-09 18:40:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 14175 transitions. [2021-07-09 18:40:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:16,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:16,346 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:16,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-07-09 18:40:16,547 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-07-09 18:40:16,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:16,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046658629] [2021-07-09 18:40:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:16,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:16,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046658629] [2021-07-09 18:40:16,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046658629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:16,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597675705] [2021-07-09 18:40:16,576 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 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 [2021-07-09 18:40:16,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:40:16,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:16,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597675705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:16,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:16,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:40:16,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225068250] [2021-07-09 18:40:16,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:16,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:16,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:16,694 INFO L87 Difference]: Start difference. First operand 3916 states and 14175 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:17,581 INFO L93 Difference]: Finished difference Result 8141 states and 27286 transitions. [2021-07-09 18:40:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:40:17,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:40:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:17,598 INFO L225 Difference]: With dead ends: 8141 [2021-07-09 18:40:17,598 INFO L226 Difference]: Without dead ends: 8132 [2021-07-09 18:40:17,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-07-09 18:40:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 4360. [2021-07-09 18:40:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 3.7118605184675384) internal successors, (16180), 4359 states have internal predecessors, (16180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 16180 transitions. [2021-07-09 18:40:17,743 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 16180 transitions. Word has length 28 [2021-07-09 18:40:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:17,743 INFO L482 AbstractCegarLoop]: Abstraction has 4360 states and 16180 transitions. [2021-07-09 18:40:17,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 16180 transitions. [2021-07-09 18:40:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:17,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:17,750 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:17,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-07-09 18:40:17,950 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:17,951 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-07-09 18:40:17,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:17,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767057029] [2021-07-09 18:40:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:17,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:17,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767057029] [2021-07-09 18:40:17,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767057029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:17,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139177353] [2021-07-09 18:40:17,980 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 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 [2021-07-09 18:40:18,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:40:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:18,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139177353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:18,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:18,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:40:18,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514444245] [2021-07-09 18:40:18,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:18,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:18,092 INFO L87 Difference]: Start difference. First operand 4360 states and 16180 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:18,919 INFO L93 Difference]: Finished difference Result 8418 states and 28143 transitions. [2021-07-09 18:40:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:40:18,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:40:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:18,944 INFO L225 Difference]: With dead ends: 8418 [2021-07-09 18:40:18,944 INFO L226 Difference]: Without dead ends: 8418 [2021-07-09 18:40:18,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-07-09 18:40:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 4380. [2021-07-09 18:40:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.69901804064855) internal successors, (16198), 4379 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 16198 transitions. [2021-07-09 18:40:19,077 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 16198 transitions. Word has length 28 [2021-07-09 18:40:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:19,078 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 16198 transitions. [2021-07-09 18:40:19,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 16198 transitions. [2021-07-09 18:40:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:19,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:19,086 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:19,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:19,286 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-07-09 18:40:19,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:19,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967707392] [2021-07-09 18:40:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967707392] [2021-07-09 18:40:19,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967707392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116275630] [2021-07-09 18:40:19,321 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 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 [2021-07-09 18:40:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:19,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116275630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:19,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:19,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184523094] [2021-07-09 18:40:19,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:19,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:19,425 INFO L87 Difference]: Start difference. First operand 4380 states and 16198 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) [2021-07-09 18:40:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:19,888 INFO L93 Difference]: Finished difference Result 7845 states and 27662 transitions. [2021-07-09 18:40:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:40:19,889 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 28 [2021-07-09 18:40:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:19,907 INFO L225 Difference]: With dead ends: 7845 [2021-07-09 18:40:19,907 INFO L226 Difference]: Without dead ends: 7762 [2021-07-09 18:40:19,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:40:19,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-07-09 18:40:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 5838. [2021-07-09 18:40:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.7627205756381703) internal successors, (21963), 5837 states have internal predecessors, (21963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 21963 transitions. [2021-07-09 18:40:20,034 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 21963 transitions. Word has length 28 [2021-07-09 18:40:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:20,034 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 21963 transitions. [2021-07-09 18:40:20,034 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) [2021-07-09 18:40:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 21963 transitions. [2021-07-09 18:40:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:20,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:20,044 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:20,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:20,244 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:20,244 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-07-09 18:40:20,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:20,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724970776] [2021-07-09 18:40:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:20,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:20,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724970776] [2021-07-09 18:40:20,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724970776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:20,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380197517] [2021-07-09 18:40:20,273 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 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 [2021-07-09 18:40:20,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:20,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:40:20,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:20,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380197517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:20,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:20,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:40:20,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662031077] [2021-07-09 18:40:20,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:40:20,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:20,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:40:20,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:40:20,355 INFO L87 Difference]: Start difference. First operand 5838 states and 21963 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-07-09 18:40:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:20,544 INFO L93 Difference]: Finished difference Result 8103 states and 28515 transitions. [2021-07-09 18:40:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:40:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-07-09 18:40:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:20,562 INFO L225 Difference]: With dead ends: 8103 [2021-07-09 18:40:20,563 INFO L226 Difference]: Without dead ends: 8103 [2021-07-09 18:40:20,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:40:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2021-07-09 18:40:20,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5980. [2021-07-09 18:40:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.7395885599598597) internal successors, (22359), 5979 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 22359 transitions. [2021-07-09 18:40:20,692 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 22359 transitions. Word has length 28 [2021-07-09 18:40:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:20,692 INFO L482 AbstractCegarLoop]: Abstraction has 5980 states and 22359 transitions. [2021-07-09 18:40:20,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-07-09 18:40:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 22359 transitions. [2021-07-09 18:40:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:20,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:20,702 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:20,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:20,903 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-07-09 18:40:20,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:20,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315268673] [2021-07-09 18:40:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:20,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315268673] [2021-07-09 18:40:20,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315268673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412161769] [2021-07-09 18:40:20,956 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 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 [2021-07-09 18:40:21,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:21,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:21,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:21,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412161769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:21,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:21,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:40:21,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317817131] [2021-07-09 18:40:21,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:21,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:21,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:21,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:21,095 INFO L87 Difference]: Start difference. First operand 5980 states and 22359 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:40:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:21,841 INFO L93 Difference]: Finished difference Result 12480 states and 43435 transitions. [2021-07-09 18:40:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:40:21,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-09 18:40:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:21,874 INFO L225 Difference]: With dead ends: 12480 [2021-07-09 18:40:21,875 INFO L226 Difference]: Without dead ends: 12480 [2021-07-09 18:40:21,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:40:21,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12480 states. [2021-07-09 18:40:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12480 to 6653. [2021-07-09 18:40:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6652 states have (on average 3.753607937462417) internal successors, (24969), 6652 states have internal predecessors, (24969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 24969 transitions. [2021-07-09 18:40:22,048 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 24969 transitions. Word has length 28 [2021-07-09 18:40:22,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:22,048 INFO L482 AbstractCegarLoop]: Abstraction has 6653 states and 24969 transitions. [2021-07-09 18:40:22,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:40:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 24969 transitions. [2021-07-09 18:40:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:22,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:22,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:22,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:22,260 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-07-09 18:40:22,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:22,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158692528] [2021-07-09 18:40:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:22,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:22,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158692528] [2021-07-09 18:40:22,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158692528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:22,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478971324] [2021-07-09 18:40:22,297 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 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 [2021-07-09 18:40:22,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:22,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:22,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:22,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478971324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:22,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:22,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:40:22,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820188679] [2021-07-09 18:40:22,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:22,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:22,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:22,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:22,389 INFO L87 Difference]: Start difference. First operand 6653 states and 24969 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-09 18:40:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:23,169 INFO L93 Difference]: Finished difference Result 12633 states and 43998 transitions. [2021-07-09 18:40:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:23,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-07-09 18:40:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:23,201 INFO L225 Difference]: With dead ends: 12633 [2021-07-09 18:40:23,201 INFO L226 Difference]: Without dead ends: 12633 [2021-07-09 18:40:23,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:40:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12633 states. [2021-07-09 18:40:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12633 to 6881. [2021-07-09 18:40:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6880 states have (on average 3.734156976744186) internal successors, (25691), 6880 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 25691 transitions. [2021-07-09 18:40:23,397 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 25691 transitions. Word has length 28 [2021-07-09 18:40:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:23,397 INFO L482 AbstractCegarLoop]: Abstraction has 6881 states and 25691 transitions. [2021-07-09 18:40:23,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-09 18:40:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 25691 transitions. [2021-07-09 18:40:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:23,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:23,409 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:23,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-07-09 18:40:23,609 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-07-09 18:40:23,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:23,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468043760] [2021-07-09 18:40:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:23,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468043760] [2021-07-09 18:40:23,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468043760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942905362] [2021-07-09 18:40:23,638 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 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 [2021-07-09 18:40:23,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:23,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:23,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942905362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:23,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:40:23,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438268720] [2021-07-09 18:40:23,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:40:23,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:23,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:40:23,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:23,724 INFO L87 Difference]: Start difference. First operand 6881 states and 25691 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-09 18:40:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:24,114 INFO L93 Difference]: Finished difference Result 9357 states and 33618 transitions. [2021-07-09 18:40:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:40:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-09 18:40:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:24,138 INFO L225 Difference]: With dead ends: 9357 [2021-07-09 18:40:24,138 INFO L226 Difference]: Without dead ends: 9327 [2021-07-09 18:40:24,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:40:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-07-09 18:40:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 7728. [2021-07-09 18:40:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7728 states, 7727 states have (on average 3.760450368836547) internal successors, (29057), 7727 states have internal predecessors, (29057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7728 states to 7728 states and 29057 transitions. [2021-07-09 18:40:24,311 INFO L78 Accepts]: Start accepts. Automaton has 7728 states and 29057 transitions. Word has length 28 [2021-07-09 18:40:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:24,312 INFO L482 AbstractCegarLoop]: Abstraction has 7728 states and 29057 transitions. [2021-07-09 18:40:24,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-09 18:40:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7728 states and 29057 transitions. [2021-07-09 18:40:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:24,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:24,325 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:24,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:24,525 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-07-09 18:40:24,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:24,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526108263] [2021-07-09 18:40:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:24,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:24,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526108263] [2021-07-09 18:40:24,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526108263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:24,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95422882] [2021-07-09 18:40:24,553 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 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 [2021-07-09 18:40:24,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:24,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:24,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95422882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:24,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:24,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:40:24,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412935047] [2021-07-09 18:40:24,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:40:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:40:24,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:24,642 INFO L87 Difference]: Start difference. First operand 7728 states and 29057 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-09 18:40:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:25,028 INFO L93 Difference]: Finished difference Result 9961 states and 35609 transitions. [2021-07-09 18:40:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:40:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-09 18:40:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:25,051 INFO L225 Difference]: With dead ends: 9961 [2021-07-09 18:40:25,051 INFO L226 Difference]: Without dead ends: 9961 [2021-07-09 18:40:25,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:40:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-07-09 18:40:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7768. [2021-07-09 18:40:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7768 states, 7767 states have (on average 3.756405304493369) internal successors, (29176), 7767 states have internal predecessors, (29176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7768 states to 7768 states and 29176 transitions. [2021-07-09 18:40:25,270 INFO L78 Accepts]: Start accepts. Automaton has 7768 states and 29176 transitions. Word has length 28 [2021-07-09 18:40:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 7768 states and 29176 transitions. [2021-07-09 18:40:25,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-09 18:40:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 7768 states and 29176 transitions. [2021-07-09 18:40:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:25,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:25,285 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:25,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3998 [2021-07-09 18:40:25,486 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-07-09 18:40:25,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:25,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617741593] [2021-07-09 18:40:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:25,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617741593] [2021-07-09 18:40:25,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617741593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:25,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424105059] [2021-07-09 18:40:25,522 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 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 [2021-07-09 18:40:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:25,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424105059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:25,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:25,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:40:25,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480553175] [2021-07-09 18:40:25,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:25,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:25,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:25,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:25,604 INFO L87 Difference]: Start difference. First operand 7768 states and 29176 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-09 18:40:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:26,260 INFO L93 Difference]: Finished difference Result 13358 states and 47391 transitions. [2021-07-09 18:40:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:40:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-07-09 18:40:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:26,295 INFO L225 Difference]: With dead ends: 13358 [2021-07-09 18:40:26,295 INFO L226 Difference]: Without dead ends: 13354 [2021-07-09 18:40:26,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:40:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13354 states. [2021-07-09 18:40:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13354 to 7674. [2021-07-09 18:40:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.760328424345106) internal successors, (28853), 7673 states have internal predecessors, (28853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 28853 transitions. [2021-07-09 18:40:26,546 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 28853 transitions. Word has length 28 [2021-07-09 18:40:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:26,546 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 28853 transitions. [2021-07-09 18:40:26,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-07-09 18:40:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 28853 transitions. [2021-07-09 18:40:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:26,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:26,559 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:26,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3999,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:26,760 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:26,760 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-07-09 18:40:26,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:26,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762759326] [2021-07-09 18:40:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:26,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:26,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762759326] [2021-07-09 18:40:26,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762759326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:26,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415469203] [2021-07-09 18:40:26,795 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 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 [2021-07-09 18:40:26,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:26,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:26,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415469203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:26,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:26,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:26,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776565050] [2021-07-09 18:40:26,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:26,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:26,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:26,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:26,884 INFO L87 Difference]: Start difference. First operand 7674 states and 28853 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) [2021-07-09 18:40:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:27,340 INFO L93 Difference]: Finished difference Result 10180 states and 36418 transitions. [2021-07-09 18:40:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:40:27,340 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 28 [2021-07-09 18:40:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:27,365 INFO L225 Difference]: With dead ends: 10180 [2021-07-09 18:40:27,365 INFO L226 Difference]: Without dead ends: 10180 [2021-07-09 18:40:27,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:40:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10180 states. [2021-07-09 18:40:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10180 to 7620. [2021-07-09 18:40:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7531172069825436) internal successors, (28595), 7619 states have internal predecessors, (28595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28595 transitions. [2021-07-09 18:40:27,537 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28595 transitions. Word has length 28 [2021-07-09 18:40:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:27,537 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28595 transitions. [2021-07-09 18:40:27,538 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) [2021-07-09 18:40:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28595 transitions. [2021-07-09 18:40:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:27,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:27,551 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:27,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-07-09 18:40:27,751 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:27,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-07-09 18:40:27,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:27,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587551378] [2021-07-09 18:40:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:27,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:27,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587551378] [2021-07-09 18:40:27,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587551378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:27,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461900523] [2021-07-09 18:40:27,793 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 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 [2021-07-09 18:40:27,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:27,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:27,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:27,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461900523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:27,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:27,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:40:27,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201704504] [2021-07-09 18:40:27,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:27,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:27,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:27,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:27,940 INFO L87 Difference]: Start difference. First operand 7620 states and 28595 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:40:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:28,704 INFO L93 Difference]: Finished difference Result 13241 states and 46888 transitions. [2021-07-09 18:40:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:28,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-09 18:40:28,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:28,739 INFO L225 Difference]: With dead ends: 13241 [2021-07-09 18:40:28,739 INFO L226 Difference]: Without dead ends: 13229 [2021-07-09 18:40:28,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-07-09 18:40:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 7620. [2021-07-09 18:40:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7520672004200026) internal successors, (28587), 7619 states have internal predecessors, (28587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28587 transitions. [2021-07-09 18:40:28,958 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28587 transitions. Word has length 28 [2021-07-09 18:40:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:28,958 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28587 transitions. [2021-07-09 18:40:28,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:40:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28587 transitions. [2021-07-09 18:40:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:28,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:28,972 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:29,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-07-09 18:40:29,173 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-07-09 18:40:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:29,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370465646] [2021-07-09 18:40:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:29,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:29,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370465646] [2021-07-09 18:40:29,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370465646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:29,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939787411] [2021-07-09 18:40:29,215 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 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 [2021-07-09 18:40:29,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:29,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:29,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939787411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:29,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:29,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:29,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472438285] [2021-07-09 18:40:29,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:29,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:29,316 INFO L87 Difference]: Start difference. First operand 7620 states and 28587 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:30,585 INFO L93 Difference]: Finished difference Result 20083 states and 70057 transitions. [2021-07-09 18:40:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:40:30,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:40:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:30,645 INFO L225 Difference]: With dead ends: 20083 [2021-07-09 18:40:30,645 INFO L226 Difference]: Without dead ends: 20083 [2021-07-09 18:40:30,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 739.1ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:40:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20083 states. [2021-07-09 18:40:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20083 to 10419. [2021-07-09 18:40:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10418 states have (on average 3.7977538875023997) internal successors, (39565), 10418 states have internal predecessors, (39565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 39565 transitions. [2021-07-09 18:40:31,108 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 39565 transitions. Word has length 28 [2021-07-09 18:40:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:31,108 INFO L482 AbstractCegarLoop]: Abstraction has 10419 states and 39565 transitions. [2021-07-09 18:40:31,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 39565 transitions. [2021-07-09 18:40:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:31,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:31,126 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:31,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-07-09 18:40:31,326 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:31,327 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-07-09 18:40:31,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:31,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123247902] [2021-07-09 18:40:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:31,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:31,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123247902] [2021-07-09 18:40:31,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123247902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:31,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338871122] [2021-07-09 18:40:31,367 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 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 [2021-07-09 18:40:31,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:40:31,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:31,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:31,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:31,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338871122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:31,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:31,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:31,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681843791] [2021-07-09 18:40:31,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:31,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:31,535 INFO L87 Difference]: Start difference. First operand 10419 states and 39565 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:32,610 INFO L93 Difference]: Finished difference Result 19333 states and 68102 transitions. [2021-07-09 18:40:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:40:32,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:40:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:32,657 INFO L225 Difference]: With dead ends: 19333 [2021-07-09 18:40:32,658 INFO L226 Difference]: Without dead ends: 19321 [2021-07-09 18:40:32,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:40:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19321 states. [2021-07-09 18:40:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19321 to 10233. [2021-07-09 18:40:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10233 states, 10232 states have (on average 3.8045347928068804) internal successors, (38928), 10232 states have internal predecessors, (38928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 38928 transitions. [2021-07-09 18:40:33,078 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 38928 transitions. Word has length 28 [2021-07-09 18:40:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:33,079 INFO L482 AbstractCegarLoop]: Abstraction has 10233 states and 38928 transitions. [2021-07-09 18:40:33,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 38928 transitions. [2021-07-09 18:40:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:33,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:33,097 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:33,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:33,299 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-07-09 18:40:33,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:33,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371382924] [2021-07-09 18:40:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:33,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371382924] [2021-07-09 18:40:33,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371382924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736130889] [2021-07-09 18:40:33,363 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 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 [2021-07-09 18:40:33,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:40:33,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:33,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:33,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736130889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:33,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:33,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488536105] [2021-07-09 18:40:33,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:33,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:33,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:33,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:33,478 INFO L87 Difference]: Start difference. First operand 10233 states and 38928 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:34,639 INFO L93 Difference]: Finished difference Result 19147 states and 67441 transitions. [2021-07-09 18:40:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:40:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:34,697 INFO L225 Difference]: With dead ends: 19147 [2021-07-09 18:40:34,697 INFO L226 Difference]: Without dead ends: 19111 [2021-07-09 18:40:34,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:40:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19111 states. [2021-07-09 18:40:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19111 to 10277. [2021-07-09 18:40:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.802646944336318) internal successors, (39076), 10276 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39076 transitions. [2021-07-09 18:40:35,119 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39076 transitions. Word has length 28 [2021-07-09 18:40:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:35,119 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 39076 transitions. [2021-07-09 18:40:35,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:40:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39076 transitions. [2021-07-09 18:40:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:35,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:35,138 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:35,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:35,338 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:35,338 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-07-09 18:40:35,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:35,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261259021] [2021-07-09 18:40:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:35,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:35,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261259021] [2021-07-09 18:40:35,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261259021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:35,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122125599] [2021-07-09 18:40:35,382 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 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 [2021-07-09 18:40:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:35,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:35,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122125599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:35,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:35,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:40:35,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046109318] [2021-07-09 18:40:35,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:35,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:35,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:35,504 INFO L87 Difference]: Start difference. First operand 10277 states and 39076 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) [2021-07-09 18:40:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:37,029 INFO L93 Difference]: Finished difference Result 19074 states and 67295 transitions. [2021-07-09 18:40:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:40:37,030 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 28 [2021-07-09 18:40:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:37,085 INFO L225 Difference]: With dead ends: 19074 [2021-07-09 18:40:37,086 INFO L226 Difference]: Without dead ends: 19074 [2021-07-09 18:40:37,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:40:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19074 states. [2021-07-09 18:40:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19074 to 10473. [2021-07-09 18:40:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10473 states, 10472 states have (on average 3.793544690603514) internal successors, (39726), 10472 states have internal predecessors, (39726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10473 states to 10473 states and 39726 transitions. [2021-07-09 18:40:37,481 INFO L78 Accepts]: Start accepts. Automaton has 10473 states and 39726 transitions. Word has length 28 [2021-07-09 18:40:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:37,481 INFO L482 AbstractCegarLoop]: Abstraction has 10473 states and 39726 transitions. [2021-07-09 18:40:37,481 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) [2021-07-09 18:40:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 10473 states and 39726 transitions. [2021-07-09 18:40:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:37,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:37,502 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:37,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:37,702 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:37,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-07-09 18:40:37,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:37,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687100499] [2021-07-09 18:40:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:37,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:37,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687100499] [2021-07-09 18:40:37,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687100499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:37,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443801126] [2021-07-09 18:40:37,745 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 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 [2021-07-09 18:40:37,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:37,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:37,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:37,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443801126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:37,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:37,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:40:37,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177818289] [2021-07-09 18:40:37,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:37,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:37,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:37,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:37,877 INFO L87 Difference]: Start difference. First operand 10473 states and 39726 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) [2021-07-09 18:40:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:39,235 INFO L93 Difference]: Finished difference Result 18684 states and 66217 transitions. [2021-07-09 18:40:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:40:39,235 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 28 [2021-07-09 18:40:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:39,282 INFO L225 Difference]: With dead ends: 18684 [2021-07-09 18:40:39,282 INFO L226 Difference]: Without dead ends: 18672 [2021-07-09 18:40:39,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 807.2ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:40:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18672 states. [2021-07-09 18:40:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18672 to 10355. [2021-07-09 18:40:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10355 states, 10354 states have (on average 3.7980490631639947) internal successors, (39325), 10354 states have internal predecessors, (39325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 39325 transitions. [2021-07-09 18:40:39,661 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 39325 transitions. Word has length 28 [2021-07-09 18:40:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:39,661 INFO L482 AbstractCegarLoop]: Abstraction has 10355 states and 39325 transitions. [2021-07-09 18:40:39,662 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) [2021-07-09 18:40:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 39325 transitions. [2021-07-09 18:40:39,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:39,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:39,680 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:39,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4006 [2021-07-09 18:40:39,881 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:39,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-07-09 18:40:39,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:39,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543575505] [2021-07-09 18:40:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543575505] [2021-07-09 18:40:39,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543575505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24360545] [2021-07-09 18:40:39,930 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 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 [2021-07-09 18:40:39,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:40:39,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:39,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:39,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:40,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24360545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:40,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:40,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:40:40,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715321275] [2021-07-09 18:40:40,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:40,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:40,046 INFO L87 Difference]: Start difference. First operand 10355 states and 39325 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:40:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:41,177 INFO L93 Difference]: Finished difference Result 17924 states and 64133 transitions. [2021-07-09 18:40:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-09 18:40:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:41,232 INFO L225 Difference]: With dead ends: 17924 [2021-07-09 18:40:41,233 INFO L226 Difference]: Without dead ends: 17888 [2021-07-09 18:40:41,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 638.8ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:40:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17888 states. [2021-07-09 18:40:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17888 to 10379. [2021-07-09 18:40:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 3.7969743688571977) internal successors, (39405), 10378 states have internal predecessors, (39405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 39405 transitions. [2021-07-09 18:40:41,658 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 39405 transitions. Word has length 28 [2021-07-09 18:40:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:41,658 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 39405 transitions. [2021-07-09 18:40:41,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:40:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 39405 transitions. [2021-07-09 18:40:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:41,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:41,677 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:41,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:41,878 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:41,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-07-09 18:40:41,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:41,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279431725] [2021-07-09 18:40:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:41,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279431725] [2021-07-09 18:40:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279431725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769682379] [2021-07-09 18:40:41,918 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 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 [2021-07-09 18:40:41,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:41,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:42,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769682379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:42,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:42,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:42,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674803211] [2021-07-09 18:40:42,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:42,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:42,062 INFO L87 Difference]: Start difference. First operand 10379 states and 39405 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:40:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:43,597 INFO L93 Difference]: Finished difference Result 26041 states and 92685 transitions. [2021-07-09 18:40:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:40:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:40:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:43,675 INFO L225 Difference]: With dead ends: 26041 [2021-07-09 18:40:43,676 INFO L226 Difference]: Without dead ends: 26041 [2021-07-09 18:40:43,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 863.7ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:40:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26041 states. [2021-07-09 18:40:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26041 to 10669. [2021-07-09 18:40:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 3.8225534308211473) internal successors, (40779), 10668 states have internal predecessors, (40779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 40779 transitions. [2021-07-09 18:40:44,113 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 40779 transitions. Word has length 28 [2021-07-09 18:40:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:44,113 INFO L482 AbstractCegarLoop]: Abstraction has 10669 states and 40779 transitions. [2021-07-09 18:40:44,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:40:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 40779 transitions. [2021-07-09 18:40:44,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:44,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:44,132 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:44,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4008 [2021-07-09 18:40:44,333 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-07-09 18:40:44,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:44,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933096636] [2021-07-09 18:40:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:44,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:44,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933096636] [2021-07-09 18:40:44,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933096636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096768058] [2021-07-09 18:40:44,372 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 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 [2021-07-09 18:40:44,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:44,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:44,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:44,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096768058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:44,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49691165] [2021-07-09 18:40:44,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:44,505 INFO L87 Difference]: Start difference. First operand 10669 states and 40779 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:40:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:45,903 INFO L93 Difference]: Finished difference Result 25481 states and 91317 transitions. [2021-07-09 18:40:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:40:45,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:40:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:45,985 INFO L225 Difference]: With dead ends: 25481 [2021-07-09 18:40:45,986 INFO L226 Difference]: Without dead ends: 25481 [2021-07-09 18:40:45,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:40:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2021-07-09 18:40:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 10571. [2021-07-09 18:40:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.809744560075686) internal successors, (40269), 10570 states have internal predecessors, (40269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 40269 transitions. [2021-07-09 18:40:46,408 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 40269 transitions. Word has length 28 [2021-07-09 18:40:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:46,408 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 40269 transitions. [2021-07-09 18:40:46,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:40:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 40269 transitions. [2021-07-09 18:40:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:46,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:46,426 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:46,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:46,627 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:46,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-07-09 18:40:46,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:46,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375659064] [2021-07-09 18:40:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:46,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:46,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375659064] [2021-07-09 18:40:46,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375659064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:46,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222999465] [2021-07-09 18:40:46,665 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 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 [2021-07-09 18:40:46,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:46,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:46,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:46,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222999465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:46,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:46,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:46,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865762502] [2021-07-09 18:40:46,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:46,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:46,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:46,797 INFO L87 Difference]: Start difference. First operand 10571 states and 40269 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-07-09 18:40:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:47,717 INFO L93 Difference]: Finished difference Result 20226 states and 72726 transitions. [2021-07-09 18:40:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:40:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 28 [2021-07-09 18:40:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:47,773 INFO L225 Difference]: With dead ends: 20226 [2021-07-09 18:40:47,773 INFO L226 Difference]: Without dead ends: 20226 [2021-07-09 18:40:47,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:40:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-07-09 18:40:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 10580. [2021-07-09 18:40:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 3.8086775687683145) internal successors, (40292), 10579 states have internal predecessors, (40292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 40292 transitions. [2021-07-09 18:40:48,137 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 40292 transitions. Word has length 28 [2021-07-09 18:40:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:48,137 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 40292 transitions. [2021-07-09 18:40:48,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-07-09 18:40:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 40292 transitions. [2021-07-09 18:40:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:48,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:48,156 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:48,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-07-09 18:40:48,356 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-07-09 18:40:48,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:48,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623431050] [2021-07-09 18:40:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:48,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:48,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623431050] [2021-07-09 18:40:48,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623431050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:48,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474584543] [2021-07-09 18:40:48,401 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 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 [2021-07-09 18:40:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:48,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:48,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474584543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:48,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:48,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:48,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613698815] [2021-07-09 18:40:48,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:48,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:48,548 INFO L87 Difference]: Start difference. First operand 10580 states and 40292 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:40:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:49,391 INFO L93 Difference]: Finished difference Result 18775 states and 68086 transitions. [2021-07-09 18:40:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:40:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-09 18:40:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:49,444 INFO L225 Difference]: With dead ends: 18775 [2021-07-09 18:40:49,444 INFO L226 Difference]: Without dead ends: 18775 [2021-07-09 18:40:49,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:40:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-07-09 18:40:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10592. [2021-07-09 18:40:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.807950146350675) internal successors, (40330), 10591 states have internal predecessors, (40330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40330 transitions. [2021-07-09 18:40:49,788 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40330 transitions. Word has length 28 [2021-07-09 18:40:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:49,788 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40330 transitions. [2021-07-09 18:40:49,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:40:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40330 transitions. [2021-07-09 18:40:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:49,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:49,807 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:50,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-07-09 18:40:50,008 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-07-09 18:40:50,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:50,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664280784] [2021-07-09 18:40:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:50,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:50,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664280784] [2021-07-09 18:40:50,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664280784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:50,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136715544] [2021-07-09 18:40:50,044 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 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 [2021-07-09 18:40:50,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:50,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136715544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:50,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:50,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:50,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063270185] [2021-07-09 18:40:50,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:50,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:50,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:50,180 INFO L87 Difference]: Start difference. First operand 10592 states and 40330 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) [2021-07-09 18:40:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:51,388 INFO L93 Difference]: Finished difference Result 19382 states and 69829 transitions. [2021-07-09 18:40:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:40:51,389 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 28 [2021-07-09 18:40:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:51,438 INFO L225 Difference]: With dead ends: 19382 [2021-07-09 18:40:51,438 INFO L226 Difference]: Without dead ends: 19382 [2021-07-09 18:40:51,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 778.5ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:40:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19382 states. [2021-07-09 18:40:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19382 to 10700. [2021-07-09 18:40:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10699 states have (on average 3.800729040097205) internal successors, (40664), 10699 states have internal predecessors, (40664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 40664 transitions. [2021-07-09 18:40:51,773 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 40664 transitions. Word has length 28 [2021-07-09 18:40:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:51,773 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 40664 transitions. [2021-07-09 18:40:51,773 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) [2021-07-09 18:40:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 40664 transitions. [2021-07-09 18:40:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:51,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:51,792 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:51,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-07-09 18:40:51,992 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:51,992 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-07-09 18:40:51,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:51,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440640256] [2021-07-09 18:40:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:52,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:52,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440640256] [2021-07-09 18:40:52,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440640256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:52,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789606172] [2021-07-09 18:40:52,028 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 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 [2021-07-09 18:40:52,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:40:52,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:52,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:52,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789606172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:52,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:52,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:52,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14688041] [2021-07-09 18:40:52,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:52,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:52,152 INFO L87 Difference]: Start difference. First operand 10700 states and 40664 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) [2021-07-09 18:40:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:53,206 INFO L93 Difference]: Finished difference Result 18954 states and 68665 transitions. [2021-07-09 18:40:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:40:53,207 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 28 [2021-07-09 18:40:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:53,256 INFO L225 Difference]: With dead ends: 18954 [2021-07-09 18:40:53,256 INFO L226 Difference]: Without dead ends: 18950 [2021-07-09 18:40:53,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:40:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-07-09 18:40:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 10626. [2021-07-09 18:40:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10626 states, 10625 states have (on average 3.804705882352941) internal successors, (40425), 10625 states have internal predecessors, (40425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10626 states to 10626 states and 40425 transitions. [2021-07-09 18:40:53,604 INFO L78 Accepts]: Start accepts. Automaton has 10626 states and 40425 transitions. Word has length 28 [2021-07-09 18:40:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:53,604 INFO L482 AbstractCegarLoop]: Abstraction has 10626 states and 40425 transitions. [2021-07-09 18:40:53,604 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) [2021-07-09 18:40:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10626 states and 40425 transitions. [2021-07-09 18:40:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:53,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:53,623 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:53,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-07-09 18:40:53,824 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-07-09 18:40:53,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:53,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137993827] [2021-07-09 18:40:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:53,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:53,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137993827] [2021-07-09 18:40:53,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137993827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:53,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363547187] [2021-07-09 18:40:53,866 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 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 [2021-07-09 18:40:53,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:53,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:54,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363547187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:54,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:54,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:54,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003881088] [2021-07-09 18:40:54,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:54,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:54,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:54,076 INFO L87 Difference]: Start difference. First operand 10626 states and 40425 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:40:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:55,221 INFO L93 Difference]: Finished difference Result 18381 states and 66150 transitions. [2021-07-09 18:40:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:40:55,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-09 18:40:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:55,272 INFO L225 Difference]: With dead ends: 18381 [2021-07-09 18:40:55,272 INFO L226 Difference]: Without dead ends: 18381 [2021-07-09 18:40:55,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 784.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:40:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18381 states. [2021-07-09 18:40:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18381 to 10853. [2021-07-09 18:40:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10852 states have (on average 3.807869517139698) internal successors, (41323), 10852 states have internal predecessors, (41323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 41323 transitions. [2021-07-09 18:40:55,608 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 41323 transitions. Word has length 28 [2021-07-09 18:40:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:55,608 INFO L482 AbstractCegarLoop]: Abstraction has 10853 states and 41323 transitions. [2021-07-09 18:40:55,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:40:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 41323 transitions. [2021-07-09 18:40:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:55,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:55,627 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:55,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:55,828 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:55,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-07-09 18:40:55,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:55,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409978023] [2021-07-09 18:40:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:55,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409978023] [2021-07-09 18:40:55,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409978023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026909193] [2021-07-09 18:40:55,870 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 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 [2021-07-09 18:40:55,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:40:55,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:55,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:55,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026909193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:55,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:55,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238566297] [2021-07-09 18:40:55,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:55,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:55,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:55,988 INFO L87 Difference]: Start difference. First operand 10853 states and 41323 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:40:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:57,003 INFO L93 Difference]: Finished difference Result 18091 states and 65344 transitions. [2021-07-09 18:40:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-09 18:40:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:57,057 INFO L225 Difference]: With dead ends: 18091 [2021-07-09 18:40:57,057 INFO L226 Difference]: Without dead ends: 18079 [2021-07-09 18:40:57,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:40:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18079 states. [2021-07-09 18:40:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18079 to 10955. [2021-07-09 18:40:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 10954 states have (on average 3.8018988497352564) internal successors, (41646), 10954 states have internal predecessors, (41646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 41646 transitions. [2021-07-09 18:40:57,449 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 41646 transitions. Word has length 28 [2021-07-09 18:40:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,449 INFO L482 AbstractCegarLoop]: Abstraction has 10955 states and 41646 transitions. [2021-07-09 18:40:57,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:40:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 41646 transitions. [2021-07-09 18:40:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:57,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,468 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:57,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:57,669 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 71 times [2021-07-09 18:40:57,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217744962] [2021-07-09 18:40:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217744962] [2021-07-09 18:40:57,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217744962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675670508] [2021-07-09 18:40:57,719 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 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 [2021-07-09 18:40:57,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:57,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:57,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675670508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:57,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:40:57,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325353710] [2021-07-09 18:40:57,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:57,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:57,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:57,810 INFO L87 Difference]: Start difference. First operand 10955 states and 41646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-09 18:40:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:58,282 INFO L93 Difference]: Finished difference Result 15599 states and 57718 transitions. [2021-07-09 18:40:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:40:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-09 18:40:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:58,327 INFO L225 Difference]: With dead ends: 15599 [2021-07-09 18:40:58,327 INFO L226 Difference]: Without dead ends: 15599 [2021-07-09 18:40:58,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2021-07-09 18:40:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 11027. [2021-07-09 18:40:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11027 states, 11026 states have (on average 3.7972066025757303) internal successors, (41868), 11026 states have internal predecessors, (41868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11027 states to 11027 states and 41868 transitions. [2021-07-09 18:40:58,607 INFO L78 Accepts]: Start accepts. Automaton has 11027 states and 41868 transitions. Word has length 28 [2021-07-09 18:40:58,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:58,607 INFO L482 AbstractCegarLoop]: Abstraction has 11027 states and 41868 transitions. [2021-07-09 18:40:58,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-09 18:40:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 11027 states and 41868 transitions. [2021-07-09 18:40:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:58,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:58,626 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:58,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:58,827 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 72 times [2021-07-09 18:40:58,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:58,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230253447] [2021-07-09 18:40:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:58,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:58,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230253447] [2021-07-09 18:40:58,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230253447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:58,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363443173] [2021-07-09 18:40:58,863 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 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 [2021-07-09 18:40:58,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:40:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:58,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363443173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:58,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:58,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:58,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543688221] [2021-07-09 18:40:58,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:58,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:58,953 INFO L87 Difference]: Start difference. First operand 11027 states and 41868 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) [2021-07-09 18:40:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:59,500 INFO L93 Difference]: Finished difference Result 16567 states and 60532 transitions. [2021-07-09 18:40:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:40:59,500 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 28 [2021-07-09 18:40:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:59,546 INFO L225 Difference]: With dead ends: 16567 [2021-07-09 18:40:59,546 INFO L226 Difference]: Without dead ends: 16567 [2021-07-09 18:40:59,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:40:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16567 states. [2021-07-09 18:40:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16567 to 11355. [2021-07-09 18:40:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 3.779284833538841) internal successors, (42910), 11354 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 42910 transitions. [2021-07-09 18:40:59,914 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 42910 transitions. Word has length 28 [2021-07-09 18:40:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:59,914 INFO L482 AbstractCegarLoop]: Abstraction has 11355 states and 42910 transitions. [2021-07-09 18:40:59,914 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) [2021-07-09 18:40:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 42910 transitions. [2021-07-09 18:40:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:59,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:59,934 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:00,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:00,135 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 73 times [2021-07-09 18:41:00,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:00,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226314042] [2021-07-09 18:41:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:00,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:00,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226314042] [2021-07-09 18:41:00,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226314042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:00,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599940109] [2021-07-09 18:41:00,169 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 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 [2021-07-09 18:41:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:00,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599940109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:00,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:00,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:41:00,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567598518] [2021-07-09 18:41:00,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:00,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:00,290 INFO L87 Difference]: Start difference. First operand 11355 states and 42910 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:00,859 INFO L93 Difference]: Finished difference Result 16375 states and 60421 transitions. [2021-07-09 18:41:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:41:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:00,901 INFO L225 Difference]: With dead ends: 16375 [2021-07-09 18:41:00,901 INFO L226 Difference]: Without dead ends: 16331 [2021-07-09 18:41:00,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:41:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-07-09 18:41:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 13242. [2021-07-09 18:41:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13242 states, 13241 states have (on average 3.819726606751756) internal successors, (50577), 13241 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13242 states to 13242 states and 50577 transitions. [2021-07-09 18:41:01,210 INFO L78 Accepts]: Start accepts. Automaton has 13242 states and 50577 transitions. Word has length 28 [2021-07-09 18:41:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:01,211 INFO L482 AbstractCegarLoop]: Abstraction has 13242 states and 50577 transitions. [2021-07-09 18:41:01,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 13242 states and 50577 transitions. [2021-07-09 18:41:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:01,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:01,235 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:01,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:01,436 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 74 times [2021-07-09 18:41:01,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:01,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269916108] [2021-07-09 18:41:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:01,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:01,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269916108] [2021-07-09 18:41:01,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269916108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:01,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911115408] [2021-07-09 18:41:01,473 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 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 [2021-07-09 18:41:01,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:01,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:01,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911115408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:01,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:01,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740679335] [2021-07-09 18:41:01,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:01,555 INFO L87 Difference]: Start difference. First operand 13242 states and 50577 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) [2021-07-09 18:41:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:02,008 INFO L93 Difference]: Finished difference Result 18146 states and 67670 transitions. [2021-07-09 18:41:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:41:02,009 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 28 [2021-07-09 18:41:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:02,061 INFO L225 Difference]: With dead ends: 18146 [2021-07-09 18:41:02,061 INFO L226 Difference]: Without dead ends: 18138 [2021-07-09 18:41:02,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:41:02,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18138 states. [2021-07-09 18:41:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18138 to 13160. [2021-07-09 18:41:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 3.8226308990044835) internal successors, (50302), 13159 states have internal predecessors, (50302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 50302 transitions. [2021-07-09 18:41:02,531 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 50302 transitions. Word has length 28 [2021-07-09 18:41:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:02,531 INFO L482 AbstractCegarLoop]: Abstraction has 13160 states and 50302 transitions. [2021-07-09 18:41:02,532 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) [2021-07-09 18:41:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 50302 transitions. [2021-07-09 18:41:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:02,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:02,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:02,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:02,756 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 75 times [2021-07-09 18:41:02,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:02,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321252983] [2021-07-09 18:41:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:02,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:02,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321252983] [2021-07-09 18:41:02,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321252983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:02,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023930480] [2021-07-09 18:41:02,804 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 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 [2021-07-09 18:41:02,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:41:02,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:02,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:02,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023930480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:02,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:02,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:41:02,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872219164] [2021-07-09 18:41:02,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:02,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:02,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:02,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:02,891 INFO L87 Difference]: Start difference. First operand 13160 states and 50302 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-09 18:41:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:03,391 INFO L93 Difference]: Finished difference Result 18024 states and 67311 transitions. [2021-07-09 18:41:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:41:03,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-09 18:41:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:03,447 INFO L225 Difference]: With dead ends: 18024 [2021-07-09 18:41:03,447 INFO L226 Difference]: Without dead ends: 18012 [2021-07-09 18:41:03,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:41:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-07-09 18:41:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 13126. [2021-07-09 18:41:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 13125 states have (on average 3.8246857142857142) internal successors, (50199), 13125 states have internal predecessors, (50199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 50199 transitions. [2021-07-09 18:41:03,804 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 50199 transitions. Word has length 28 [2021-07-09 18:41:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:03,804 INFO L482 AbstractCegarLoop]: Abstraction has 13126 states and 50199 transitions. [2021-07-09 18:41:03,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-09 18:41:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 50199 transitions. [2021-07-09 18:41:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:03,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:03,827 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:04,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-07-09 18:41:04,028 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 76 times [2021-07-09 18:41:04,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:04,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200559902] [2021-07-09 18:41:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:04,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:04,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200559902] [2021-07-09 18:41:04,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200559902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495375164] [2021-07-09 18:41:04,064 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 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 [2021-07-09 18:41:04,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:04,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:04,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495375164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:04,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:41:04,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004149240] [2021-07-09 18:41:04,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:41:04,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:04,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:41:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:41:04,188 INFO L87 Difference]: Start difference. First operand 13126 states and 50199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-07-09 18:41:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:05,177 INFO L93 Difference]: Finished difference Result 24612 states and 88773 transitions. [2021-07-09 18:41:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:41:05,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-07-09 18:41:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:05,252 INFO L225 Difference]: With dead ends: 24612 [2021-07-09 18:41:05,252 INFO L226 Difference]: Without dead ends: 24612 [2021-07-09 18:41:05,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 533.3ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:41:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24612 states. [2021-07-09 18:41:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24612 to 13108. [2021-07-09 18:41:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 3.8236057068741895) internal successors, (50116), 13107 states have internal predecessors, (50116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 50116 transitions. [2021-07-09 18:41:05,794 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 50116 transitions. Word has length 28 [2021-07-09 18:41:05,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:05,794 INFO L482 AbstractCegarLoop]: Abstraction has 13108 states and 50116 transitions. [2021-07-09 18:41:05,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-07-09 18:41:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 50116 transitions. [2021-07-09 18:41:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:05,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:05,821 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:06,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-07-09 18:41:06,021 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-07-09 18:41:06,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:06,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958181244] [2021-07-09 18:41:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:06,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:06,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958181244] [2021-07-09 18:41:06,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958181244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133423644] [2021-07-09 18:41:06,053 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 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 [2021-07-09 18:41:06,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:06,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:06,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133423644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:06,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:41:06,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215347142] [2021-07-09 18:41:06,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:06,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:06,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:06,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:06,165 INFO L87 Difference]: Start difference. First operand 13108 states and 50116 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-07-09 18:41:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:06,903 INFO L93 Difference]: Finished difference Result 20270 states and 73737 transitions. [2021-07-09 18:41:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:41:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-07-09 18:41:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:06,959 INFO L225 Difference]: With dead ends: 20270 [2021-07-09 18:41:06,959 INFO L226 Difference]: Without dead ends: 20257 [2021-07-09 18:41:06,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:41:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2021-07-09 18:41:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 14410. [2021-07-09 18:41:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14410 states, 14409 states have (on average 3.8785481296411963) internal successors, (55886), 14409 states have internal predecessors, (55886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 55886 transitions. [2021-07-09 18:41:07,389 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 55886 transitions. Word has length 28 [2021-07-09 18:41:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:07,389 INFO L482 AbstractCegarLoop]: Abstraction has 14410 states and 55886 transitions. [2021-07-09 18:41:07,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-07-09 18:41:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 55886 transitions. [2021-07-09 18:41:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:07,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:07,417 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:07,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-07-09 18:41:07,617 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-07-09 18:41:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:07,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768175953] [2021-07-09 18:41:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:07,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:07,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768175953] [2021-07-09 18:41:07,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768175953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614532884] [2021-07-09 18:41:07,646 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 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 [2021-07-09 18:41:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:07,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614532884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:07,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:41:07,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929502002] [2021-07-09 18:41:07,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:07,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:07,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:07,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:07,759 INFO L87 Difference]: Start difference. First operand 14410 states and 55886 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-07-09 18:41:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:08,548 INFO L93 Difference]: Finished difference Result 20362 states and 73979 transitions. [2021-07-09 18:41:08,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:41:08,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-07-09 18:41:08,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:08,693 INFO L225 Difference]: With dead ends: 20362 [2021-07-09 18:41:08,694 INFO L226 Difference]: Without dead ends: 20356 [2021-07-09 18:41:08,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:41:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-07-09 18:41:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 14386. [2021-07-09 18:41:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14386 states, 14385 states have (on average 3.877650330205075) internal successors, (55780), 14385 states have internal predecessors, (55780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14386 states to 14386 states and 55780 transitions. [2021-07-09 18:41:09,093 INFO L78 Accepts]: Start accepts. Automaton has 14386 states and 55780 transitions. Word has length 28 [2021-07-09 18:41:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:09,094 INFO L482 AbstractCegarLoop]: Abstraction has 14386 states and 55780 transitions. [2021-07-09 18:41:09,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-07-09 18:41:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 14386 states and 55780 transitions. [2021-07-09 18:41:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:09,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:09,122 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:09,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-07-09 18:41:09,322 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-07-09 18:41:09,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:09,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046056971] [2021-07-09 18:41:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:09,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:09,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046056971] [2021-07-09 18:41:09,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046056971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:09,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636322946] [2021-07-09 18:41:09,350 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 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 [2021-07-09 18:41:09,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:09,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:09,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636322946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:09,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:09,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:41:09,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120664895] [2021-07-09 18:41:09,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:09,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:09,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:09,455 INFO L87 Difference]: Start difference. First operand 14386 states and 55780 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:41:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:10,167 INFO L93 Difference]: Finished difference Result 23158 states and 84169 transitions. [2021-07-09 18:41:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:41:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:41:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:10,228 INFO L225 Difference]: With dead ends: 23158 [2021-07-09 18:41:10,229 INFO L226 Difference]: Without dead ends: 23145 [2021-07-09 18:41:10,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:41:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23145 states. [2021-07-09 18:41:10,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23145 to 14458. [2021-07-09 18:41:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14458 states, 14457 states have (on average 3.882548246524175) internal successors, (56130), 14457 states have internal predecessors, (56130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14458 states to 14458 states and 56130 transitions. [2021-07-09 18:41:10,701 INFO L78 Accepts]: Start accepts. Automaton has 14458 states and 56130 transitions. Word has length 28 [2021-07-09 18:41:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:10,701 INFO L482 AbstractCegarLoop]: Abstraction has 14458 states and 56130 transitions. [2021-07-09 18:41:10,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:41:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 14458 states and 56130 transitions. [2021-07-09 18:41:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:10,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:10,730 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:10,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-07-09 18:41:10,930 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-07-09 18:41:10,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:10,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226373401] [2021-07-09 18:41:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:10,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226373401] [2021-07-09 18:41:10,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226373401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124663741] [2021-07-09 18:41:10,958 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 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 [2021-07-09 18:41:10,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:10,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:10,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:11,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124663741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:11,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:11,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:41:11,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439666564] [2021-07-09 18:41:11,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:11,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:11,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:11,066 INFO L87 Difference]: Start difference. First operand 14458 states and 56130 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:41:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:11,886 INFO L93 Difference]: Finished difference Result 24792 states and 89366 transitions. [2021-07-09 18:41:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:41:11,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:41:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:11,966 INFO L225 Difference]: With dead ends: 24792 [2021-07-09 18:41:11,966 INFO L226 Difference]: Without dead ends: 24792 [2021-07-09 18:41:11,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:41:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24792 states. [2021-07-09 18:41:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24792 to 14502. [2021-07-09 18:41:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14502 states, 14501 states have (on average 3.8793876284394178) internal successors, (56255), 14501 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14502 states to 14502 states and 56255 transitions. [2021-07-09 18:41:12,435 INFO L78 Accepts]: Start accepts. Automaton has 14502 states and 56255 transitions. Word has length 28 [2021-07-09 18:41:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:12,435 INFO L482 AbstractCegarLoop]: Abstraction has 14502 states and 56255 transitions. [2021-07-09 18:41:12,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:41:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 14502 states and 56255 transitions. [2021-07-09 18:41:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:12,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:12,463 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:12,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:12,663 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:12,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:12,663 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 77 times [2021-07-09 18:41:12,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:12,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80826498] [2021-07-09 18:41:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:12,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:12,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80826498] [2021-07-09 18:41:12,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80826498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:12,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710251999] [2021-07-09 18:41:12,699 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 [2021-07-09 18:41:12,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:41:12,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:12,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:12,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:12,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710251999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:12,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:12,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:41:12,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39180654] [2021-07-09 18:41:12,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:12,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:12,804 INFO L87 Difference]: Start difference. First operand 14502 states and 56255 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-09 18:41:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:13,811 INFO L93 Difference]: Finished difference Result 24486 states and 90901 transitions. [2021-07-09 18:41:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:41:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-09 18:41:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:13,883 INFO L225 Difference]: With dead ends: 24486 [2021-07-09 18:41:13,883 INFO L226 Difference]: Without dead ends: 24482 [2021-07-09 18:41:13,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 556.8ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:41:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24482 states. [2021-07-09 18:41:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24482 to 14756. [2021-07-09 18:41:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14756 states, 14755 states have (on average 3.869739071501186) internal successors, (57098), 14755 states have internal predecessors, (57098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14756 states to 14756 states and 57098 transitions. [2021-07-09 18:41:14,355 INFO L78 Accepts]: Start accepts. Automaton has 14756 states and 57098 transitions. Word has length 28 [2021-07-09 18:41:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:14,355 INFO L482 AbstractCegarLoop]: Abstraction has 14756 states and 57098 transitions. [2021-07-09 18:41:14,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-09 18:41:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 14756 states and 57098 transitions. [2021-07-09 18:41:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:14,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:14,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:14,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:14,715 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:14,716 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-07-09 18:41:14,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:14,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420130528] [2021-07-09 18:41:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420130528] [2021-07-09 18:41:14,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420130528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819802857] [2021-07-09 18:41:14,748 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 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 [2021-07-09 18:41:14,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:14,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:14,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:14,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819802857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:14,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:41:14,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81673435] [2021-07-09 18:41:14,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:14,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:14,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:14,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:14,844 INFO L87 Difference]: Start difference. First operand 14756 states and 57098 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:41:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:15,565 INFO L93 Difference]: Finished difference Result 21631 states and 80082 transitions. [2021-07-09 18:41:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:41:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-09 18:41:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:15,630 INFO L225 Difference]: With dead ends: 21631 [2021-07-09 18:41:15,631 INFO L226 Difference]: Without dead ends: 21608 [2021-07-09 18:41:15,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:41:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21608 states. [2021-07-09 18:41:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21608 to 15111. [2021-07-09 18:41:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15111 states, 15110 states have (on average 3.888682991396426) internal successors, (58758), 15110 states have internal predecessors, (58758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15111 states to 15111 states and 58758 transitions. [2021-07-09 18:41:16,065 INFO L78 Accepts]: Start accepts. Automaton has 15111 states and 58758 transitions. Word has length 28 [2021-07-09 18:41:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:16,065 INFO L482 AbstractCegarLoop]: Abstraction has 15111 states and 58758 transitions. [2021-07-09 18:41:16,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:41:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 15111 states and 58758 transitions. [2021-07-09 18:41:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:16,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:16,094 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:16,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4027 [2021-07-09 18:41:16,297 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-07-09 18:41:16,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:16,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086479020] [2021-07-09 18:41:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:16,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:16,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086479020] [2021-07-09 18:41:16,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086479020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:16,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562831522] [2021-07-09 18:41:16,330 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 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 [2021-07-09 18:41:16,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:16,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:16,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562831522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:16,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:16,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:41:16,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893018093] [2021-07-09 18:41:16,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:16,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:16,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:16,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:16,434 INFO L87 Difference]: Start difference. First operand 15111 states and 58758 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:41:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:17,217 INFO L93 Difference]: Finished difference Result 21728 states and 79303 transitions. [2021-07-09 18:41:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:41:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-09 18:41:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:17,284 INFO L225 Difference]: With dead ends: 21728 [2021-07-09 18:41:17,284 INFO L226 Difference]: Without dead ends: 21728 [2021-07-09 18:41:17,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:41:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21728 states. [2021-07-09 18:41:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21728 to 15230. [2021-07-09 18:41:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15230 states, 15229 states have (on average 3.880753824939261) internal successors, (59100), 15229 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15230 states to 15230 states and 59100 transitions. [2021-07-09 18:41:17,827 INFO L78 Accepts]: Start accepts. Automaton has 15230 states and 59100 transitions. Word has length 28 [2021-07-09 18:41:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:17,827 INFO L482 AbstractCegarLoop]: Abstraction has 15230 states and 59100 transitions. [2021-07-09 18:41:17,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:41:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 15230 states and 59100 transitions. [2021-07-09 18:41:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:17,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:17,856 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:18,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:18,057 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-07-09 18:41:18,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:18,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258851645] [2021-07-09 18:41:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:18,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258851645] [2021-07-09 18:41:18,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258851645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536377797] [2021-07-09 18:41:18,095 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 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 [2021-07-09 18:41:18,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:41:18,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:18,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536377797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:18,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:41:18,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147124459] [2021-07-09 18:41:18,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:18,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:18,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:18,197 INFO L87 Difference]: Start difference. First operand 15230 states and 59100 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:41:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:18,929 INFO L93 Difference]: Finished difference Result 24246 states and 88914 transitions. [2021-07-09 18:41:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:41:18,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-07-09 18:41:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:19,000 INFO L225 Difference]: With dead ends: 24246 [2021-07-09 18:41:19,000 INFO L226 Difference]: Without dead ends: 24246 [2021-07-09 18:41:19,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 379.6ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:41:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2021-07-09 18:41:19,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16389. [2021-07-09 18:41:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 16388 states have (on average 3.862521357090554) internal successors, (63299), 16388 states have internal predecessors, (63299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 63299 transitions. [2021-07-09 18:41:19,454 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 63299 transitions. Word has length 28 [2021-07-09 18:41:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:19,454 INFO L482 AbstractCegarLoop]: Abstraction has 16389 states and 63299 transitions. [2021-07-09 18:41:19,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-07-09 18:41:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 63299 transitions. [2021-07-09 18:41:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:19,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:19,483 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:19,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:19,684 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:19,684 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-07-09 18:41:19,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:19,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654105899] [2021-07-09 18:41:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:19,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:19,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654105899] [2021-07-09 18:41:19,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654105899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:19,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122527422] [2021-07-09 18:41:19,717 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 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 [2021-07-09 18:41:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:19,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122527422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:19,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:19,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:41:19,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271470045] [2021-07-09 18:41:19,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:19,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:19,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:19,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:19,830 INFO L87 Difference]: Start difference. First operand 16389 states and 63299 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-09 18:41:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:20,781 INFO L93 Difference]: Finished difference Result 27385 states and 99086 transitions. [2021-07-09 18:41:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:41:20,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-09 18:41:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:20,869 INFO L225 Difference]: With dead ends: 27385 [2021-07-09 18:41:20,869 INFO L226 Difference]: Without dead ends: 27385 [2021-07-09 18:41:20,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:41:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27385 states. [2021-07-09 18:41:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27385 to 16619. [2021-07-09 18:41:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16619 states, 16618 states have (on average 3.8775424238777227) internal successors, (64437), 16618 states have internal predecessors, (64437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16619 states to 16619 states and 64437 transitions. [2021-07-09 18:41:21,444 INFO L78 Accepts]: Start accepts. Automaton has 16619 states and 64437 transitions. Word has length 28 [2021-07-09 18:41:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:21,444 INFO L482 AbstractCegarLoop]: Abstraction has 16619 states and 64437 transitions. [2021-07-09 18:41:21,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-09 18:41:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 16619 states and 64437 transitions. [2021-07-09 18:41:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:21,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:21,475 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:21,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-07-09 18:41:21,675 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 78 times [2021-07-09 18:41:21,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:21,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246350610] [2021-07-09 18:41:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:21,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:21,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246350610] [2021-07-09 18:41:21,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246350610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058174077] [2021-07-09 18:41:21,713 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 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 [2021-07-09 18:41:21,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:41:21,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:21,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058174077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:21,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178436996] [2021-07-09 18:41:21,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:21,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:21,846 INFO L87 Difference]: Start difference. First operand 16619 states and 64437 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:41:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:23,430 INFO L93 Difference]: Finished difference Result 42879 states and 155463 transitions. [2021-07-09 18:41:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:41:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:23,562 INFO L225 Difference]: With dead ends: 42879 [2021-07-09 18:41:23,562 INFO L226 Difference]: Without dead ends: 42879 [2021-07-09 18:41:23,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 928.0ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:41:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42879 states. [2021-07-09 18:41:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42879 to 17863. [2021-07-09 18:41:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.9155189788377562) internal successors, (69939), 17862 states have internal predecessors, (69939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 69939 transitions. [2021-07-09 18:41:24,436 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 69939 transitions. Word has length 28 [2021-07-09 18:41:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:24,436 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 69939 transitions. [2021-07-09 18:41:24,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:41:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 69939 transitions. [2021-07-09 18:41:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:24,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:24,468 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:24,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4031,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:24,668 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 79 times [2021-07-09 18:41:24,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:24,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429266236] [2021-07-09 18:41:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:24,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429266236] [2021-07-09 18:41:24,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429266236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59831591] [2021-07-09 18:41:24,720 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 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 [2021-07-09 18:41:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:24,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59831591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:24,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:24,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794057584] [2021-07-09 18:41:24,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:24,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:24,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:24,854 INFO L87 Difference]: Start difference. First operand 17863 states and 69939 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:41:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:26,476 INFO L93 Difference]: Finished difference Result 41907 states and 152905 transitions. [2021-07-09 18:41:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:26,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:41:26,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:26,627 INFO L225 Difference]: With dead ends: 41907 [2021-07-09 18:41:26,628 INFO L226 Difference]: Without dead ends: 41907 [2021-07-09 18:41:26,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 950.0ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:41:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41907 states. [2021-07-09 18:41:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41907 to 17837. [2021-07-09 18:41:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.912480376766091) internal successors, (69783), 17836 states have internal predecessors, (69783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 69783 transitions. [2021-07-09 18:41:27,538 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 69783 transitions. Word has length 28 [2021-07-09 18:41:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:27,538 INFO L482 AbstractCegarLoop]: Abstraction has 17837 states and 69783 transitions. [2021-07-09 18:41:27,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:41:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 69783 transitions. [2021-07-09 18:41:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:27,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:27,569 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:27,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-07-09 18:41:27,769 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-07-09 18:41:27,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:27,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720218631] [2021-07-09 18:41:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:27,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:27,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720218631] [2021-07-09 18:41:27,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720218631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086575910] [2021-07-09 18:41:27,811 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 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 [2021-07-09 18:41:27,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:27,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:27,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:27,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086575910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:27,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:27,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699489989] [2021-07-09 18:41:27,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:27,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:27,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:27,895 INFO L87 Difference]: Start difference. First operand 17837 states and 69783 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:41:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:28,210 INFO L93 Difference]: Finished difference Result 28682 states and 110964 transitions. [2021-07-09 18:41:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:41:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-07-09 18:41:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:28,301 INFO L225 Difference]: With dead ends: 28682 [2021-07-09 18:41:28,302 INFO L226 Difference]: Without dead ends: 28632 [2021-07-09 18:41:28,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28632 states. [2021-07-09 18:41:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28632 to 23563. [2021-07-09 18:41:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23563 states, 23562 states have (on average 3.9230965113318055) internal successors, (92436), 23562 states have internal predecessors, (92436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23563 states to 23563 states and 92436 transitions. [2021-07-09 18:41:28,983 INFO L78 Accepts]: Start accepts. Automaton has 23563 states and 92436 transitions. Word has length 28 [2021-07-09 18:41:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:28,983 INFO L482 AbstractCegarLoop]: Abstraction has 23563 states and 92436 transitions. [2021-07-09 18:41:28,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:41:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 23563 states and 92436 transitions. [2021-07-09 18:41:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:29,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:29,025 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:29,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-07-09 18:41:29,225 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:29,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-07-09 18:41:29,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:29,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613102138] [2021-07-09 18:41:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:29,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613102138] [2021-07-09 18:41:29,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613102138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980381196] [2021-07-09 18:41:29,255 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 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 [2021-07-09 18:41:29,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:29,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980381196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:29,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:29,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128322344] [2021-07-09 18:41:29,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:29,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:29,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:29,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:29,340 INFO L87 Difference]: Start difference. First operand 23563 states and 92436 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:41:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:29,644 INFO L93 Difference]: Finished difference Result 26308 states and 100773 transitions. [2021-07-09 18:41:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:41:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-09 18:41:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:29,725 INFO L225 Difference]: With dead ends: 26308 [2021-07-09 18:41:29,726 INFO L226 Difference]: Without dead ends: 26308 [2021-07-09 18:41:29,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26308 states. [2021-07-09 18:41:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26308 to 23066. [2021-07-09 18:41:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23066 states, 23065 states have (on average 3.9134619553435943) internal successors, (90264), 23065 states have internal predecessors, (90264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23066 states to 23066 states and 90264 transitions. [2021-07-09 18:41:30,532 INFO L78 Accepts]: Start accepts. Automaton has 23066 states and 90264 transitions. Word has length 28 [2021-07-09 18:41:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:30,532 INFO L482 AbstractCegarLoop]: Abstraction has 23066 states and 90264 transitions. [2021-07-09 18:41:30,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:41:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23066 states and 90264 transitions. [2021-07-09 18:41:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:30,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:30,576 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:30,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-07-09 18:41:30,779 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:30,780 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-07-09 18:41:30,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:30,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871427709] [2021-07-09 18:41:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871427709] [2021-07-09 18:41:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871427709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6869983] [2021-07-09 18:41:30,818 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 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 [2021-07-09 18:41:30,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:30,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:30,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6869983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:30,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:41:30,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665869666] [2021-07-09 18:41:30,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:41:30,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:30,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:41:30,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:41:30,970 INFO L87 Difference]: Start difference. First operand 23066 states and 90264 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-07-09 18:41:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:32,258 INFO L93 Difference]: Finished difference Result 35513 states and 132496 transitions. [2021-07-09 18:41:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:41:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-07-09 18:41:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:32,390 INFO L225 Difference]: With dead ends: 35513 [2021-07-09 18:41:32,390 INFO L226 Difference]: Without dead ends: 35513 [2021-07-09 18:41:32,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 617.7ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:41:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35513 states. [2021-07-09 18:41:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35513 to 23134. [2021-07-09 18:41:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 23133 states have (on average 3.9115981498292482) internal successors, (90487), 23133 states have internal predecessors, (90487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 90487 transitions. [2021-07-09 18:41:33,318 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 90487 transitions. Word has length 28 [2021-07-09 18:41:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:33,318 INFO L482 AbstractCegarLoop]: Abstraction has 23134 states and 90487 transitions. [2021-07-09 18:41:33,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-07-09 18:41:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 90487 transitions. [2021-07-09 18:41:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:33,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:33,366 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:33,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-07-09 18:41:33,566 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:33,567 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-07-09 18:41:33,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:33,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470567638] [2021-07-09 18:41:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:33,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470567638] [2021-07-09 18:41:33,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470567638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841590137] [2021-07-09 18:41:33,605 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 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 [2021-07-09 18:41:33,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:33,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:33,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:33,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:33,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841590137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:33,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:41:33,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020126911] [2021-07-09 18:41:33,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:33,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:33,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:33,819 INFO L87 Difference]: Start difference. First operand 23134 states and 90487 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-09 18:41:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:35,537 INFO L93 Difference]: Finished difference Result 45671 states and 168413 transitions. [2021-07-09 18:41:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:41:35,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-07-09 18:41:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:35,711 INFO L225 Difference]: With dead ends: 45671 [2021-07-09 18:41:35,711 INFO L226 Difference]: Without dead ends: 45671 [2021-07-09 18:41:35,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 994.7ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:41:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45671 states. [2021-07-09 18:41:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45671 to 23135. [2021-07-09 18:41:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23135 states, 23134 states have (on average 3.913460707184231) internal successors, (90534), 23134 states have internal predecessors, (90534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23135 states to 23135 states and 90534 transitions. [2021-07-09 18:41:36,785 INFO L78 Accepts]: Start accepts. Automaton has 23135 states and 90534 transitions. Word has length 28 [2021-07-09 18:41:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:36,785 INFO L482 AbstractCegarLoop]: Abstraction has 23135 states and 90534 transitions. [2021-07-09 18:41:36,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-09 18:41:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 23135 states and 90534 transitions. [2021-07-09 18:41:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:36,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:36,959 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:37,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:37,183 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-07-09 18:41:37,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:37,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211272637] [2021-07-09 18:41:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:37,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:37,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211272637] [2021-07-09 18:41:37,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211272637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:37,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809417666] [2021-07-09 18:41:37,245 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 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 [2021-07-09 18:41:37,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:41:37,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:37,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:37,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809417666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:37,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:37,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:41:37,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511369186] [2021-07-09 18:41:37,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:37,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:37,372 INFO L87 Difference]: Start difference. First operand 23135 states and 90534 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-09 18:41:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:39,023 INFO L93 Difference]: Finished difference Result 45296 states and 167759 transitions. [2021-07-09 18:41:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-07-09 18:41:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:39,185 INFO L225 Difference]: With dead ends: 45296 [2021-07-09 18:41:39,186 INFO L226 Difference]: Without dead ends: 45296 [2021-07-09 18:41:39,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 900.8ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:41:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45296 states. [2021-07-09 18:41:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45296 to 22919. [2021-07-09 18:41:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22919 states, 22918 states have (on average 3.9066236146260582) internal successors, (89532), 22918 states have internal predecessors, (89532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22919 states to 22919 states and 89532 transitions. [2021-07-09 18:41:40,175 INFO L78 Accepts]: Start accepts. Automaton has 22919 states and 89532 transitions. Word has length 28 [2021-07-09 18:41:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:40,175 INFO L482 AbstractCegarLoop]: Abstraction has 22919 states and 89532 transitions. [2021-07-09 18:41:40,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-09 18:41:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 22919 states and 89532 transitions. [2021-07-09 18:41:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:40,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:40,222 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:40,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:40,423 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:40,423 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-07-09 18:41:40,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:40,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459193227] [2021-07-09 18:41:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:40,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:40,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459193227] [2021-07-09 18:41:40,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459193227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027028502] [2021-07-09 18:41:40,456 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 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 [2021-07-09 18:41:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:40,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:40,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:40,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027028502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:40,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:41:40,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922446106] [2021-07-09 18:41:40,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:40,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:40,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:40,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:40,537 INFO L87 Difference]: Start difference. First operand 22919 states and 89532 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-09 18:41:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:41,007 INFO L93 Difference]: Finished difference Result 35247 states and 132459 transitions. [2021-07-09 18:41:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:41:41,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-07-09 18:41:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:41,281 INFO L225 Difference]: With dead ends: 35247 [2021-07-09 18:41:41,281 INFO L226 Difference]: Without dead ends: 35230 [2021-07-09 18:41:41,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35230 states. [2021-07-09 18:41:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35230 to 23187. [2021-07-09 18:41:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23187 states, 23186 states have (on average 3.9111532821530233) internal successors, (90684), 23186 states have internal predecessors, (90684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23187 states to 23187 states and 90684 transitions. [2021-07-09 18:41:42,055 INFO L78 Accepts]: Start accepts. Automaton has 23187 states and 90684 transitions. Word has length 28 [2021-07-09 18:41:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:42,055 INFO L482 AbstractCegarLoop]: Abstraction has 23187 states and 90684 transitions. [2021-07-09 18:41:42,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-09 18:41:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 23187 states and 90684 transitions. [2021-07-09 18:41:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:42,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:42,248 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:42,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:42,477 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:42,477 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-07-09 18:41:42,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:42,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182526970] [2021-07-09 18:41:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:42,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:42,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182526970] [2021-07-09 18:41:42,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182526970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253011630] [2021-07-09 18:41:42,506 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 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 [2021-07-09 18:41:42,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:42,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253011630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:42,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:41:42,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138611349] [2021-07-09 18:41:42,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:42,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:42,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:42,593 INFO L87 Difference]: Start difference. First operand 23187 states and 90684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-09 18:41:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:42,948 INFO L93 Difference]: Finished difference Result 37405 states and 139306 transitions. [2021-07-09 18:41:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:41:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-07-09 18:41:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:43,229 INFO L225 Difference]: With dead ends: 37405 [2021-07-09 18:41:43,229 INFO L226 Difference]: Without dead ends: 37405 [2021-07-09 18:41:43,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:41:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37405 states. [2021-07-09 18:41:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37405 to 22856. [2021-07-09 18:41:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22856 states, 22855 states have (on average 3.898402975278932) internal successors, (89098), 22855 states have internal predecessors, (89098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22856 states to 22856 states and 89098 transitions. [2021-07-09 18:41:43,933 INFO L78 Accepts]: Start accepts. Automaton has 22856 states and 89098 transitions. Word has length 28 [2021-07-09 18:41:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:43,933 INFO L482 AbstractCegarLoop]: Abstraction has 22856 states and 89098 transitions. [2021-07-09 18:41:43,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-09 18:41:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 22856 states and 89098 transitions. [2021-07-09 18:41:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:44,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:44,139 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:44,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:44,348 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-07-09 18:41:44,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:44,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311376109] [2021-07-09 18:41:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:44,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311376109] [2021-07-09 18:41:44,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311376109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270574371] [2021-07-09 18:41:44,394 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 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 [2021-07-09 18:41:44,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:44,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:44,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270574371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:44,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:44,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695452458] [2021-07-09 18:41:44,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:44,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:44,504 INFO L87 Difference]: Start difference. First operand 22856 states and 89098 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) [2021-07-09 18:41:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:45,489 INFO L93 Difference]: Finished difference Result 32629 states and 122440 transitions. [2021-07-09 18:41:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:41:45,490 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 28 [2021-07-09 18:41:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:45,589 INFO L225 Difference]: With dead ends: 32629 [2021-07-09 18:41:45,589 INFO L226 Difference]: Without dead ends: 32629 [2021-07-09 18:41:45,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:41:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32629 states. [2021-07-09 18:41:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32629 to 22904. [2021-07-09 18:41:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22904 states, 22903 states have (on average 3.8973060297777584) internal successors, (89260), 22903 states have internal predecessors, (89260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22904 states to 22904 states and 89260 transitions. [2021-07-09 18:41:46,435 INFO L78 Accepts]: Start accepts. Automaton has 22904 states and 89260 transitions. Word has length 28 [2021-07-09 18:41:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:46,435 INFO L482 AbstractCegarLoop]: Abstraction has 22904 states and 89260 transitions. [2021-07-09 18:41:46,435 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) [2021-07-09 18:41:46,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22904 states and 89260 transitions. [2021-07-09 18:41:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:46,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:46,479 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:46,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:46,680 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:46,680 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-07-09 18:41:46,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:46,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474644941] [2021-07-09 18:41:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:46,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:46,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474644941] [2021-07-09 18:41:46,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474644941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:46,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663415466] [2021-07-09 18:41:46,718 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 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 [2021-07-09 18:41:46,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:46,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663415466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:46,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:46,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:46,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182777048] [2021-07-09 18:41:46,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:46,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:46,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:46,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:46,819 INFO L87 Difference]: Start difference. First operand 22904 states and 89260 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) [2021-07-09 18:41:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:48,020 INFO L93 Difference]: Finished difference Result 34174 states and 126879 transitions. [2021-07-09 18:41:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:41:48,021 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 28 [2021-07-09 18:41:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:48,134 INFO L225 Difference]: With dead ends: 34174 [2021-07-09 18:41:48,134 INFO L226 Difference]: Without dead ends: 34174 [2021-07-09 18:41:48,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 576.0ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:41:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34174 states. [2021-07-09 18:41:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34174 to 23462. [2021-07-09 18:41:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 3.8782234346362046) internal successors, (90987), 23461 states have internal predecessors, (90987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 90987 transitions. [2021-07-09 18:41:49,041 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 90987 transitions. Word has length 28 [2021-07-09 18:41:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:49,042 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 90987 transitions. [2021-07-09 18:41:49,042 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) [2021-07-09 18:41:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 90987 transitions. [2021-07-09 18:41:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:49,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:49,082 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:49,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-07-09 18:41:49,282 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:49,282 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-07-09 18:41:49,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:49,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822706992] [2021-07-09 18:41:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:49,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:49,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822706992] [2021-07-09 18:41:49,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822706992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:49,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389113922] [2021-07-09 18:41:49,334 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 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 [2021-07-09 18:41:49,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:49,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:49,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:49,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389113922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:49,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:49,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:49,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374763702] [2021-07-09 18:41:49,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:49,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:49,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:49,453 INFO L87 Difference]: Start difference. First operand 23462 states and 90987 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) [2021-07-09 18:41:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:50,520 INFO L93 Difference]: Finished difference Result 33276 states and 124519 transitions. [2021-07-09 18:41:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:41:50,521 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 28 [2021-07-09 18:41:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:50,635 INFO L225 Difference]: With dead ends: 33276 [2021-07-09 18:41:50,635 INFO L226 Difference]: Without dead ends: 33272 [2021-07-09 18:41:50,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:41:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33272 states. [2021-07-09 18:41:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33272 to 23354. [2021-07-09 18:41:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23354 states, 23353 states have (on average 3.880657731340727) internal successors, (90625), 23353 states have internal predecessors, (90625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23354 states to 23354 states and 90625 transitions. [2021-07-09 18:41:51,681 INFO L78 Accepts]: Start accepts. Automaton has 23354 states and 90625 transitions. Word has length 28 [2021-07-09 18:41:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:51,681 INFO L482 AbstractCegarLoop]: Abstraction has 23354 states and 90625 transitions. [2021-07-09 18:41:51,681 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) [2021-07-09 18:41:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 23354 states and 90625 transitions. [2021-07-09 18:41:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:51,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:51,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:51,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4042,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:51,922 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-07-09 18:41:51,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:51,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118413244] [2021-07-09 18:41:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:51,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:51,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118413244] [2021-07-09 18:41:51,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118413244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:51,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844231687] [2021-07-09 18:41:51,951 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 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 [2021-07-09 18:41:51,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:51,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:51,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:51,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:41:52,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844231687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:52,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:52,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:41:52,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006737257] [2021-07-09 18:41:52,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:52,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:52,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:52,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:52,029 INFO L87 Difference]: Start difference. First operand 23354 states and 90625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:52,314 INFO L93 Difference]: Finished difference Result 29681 states and 111114 transitions. [2021-07-09 18:41:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:41:52,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 28 [2021-07-09 18:41:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:52,408 INFO L225 Difference]: With dead ends: 29681 [2021-07-09 18:41:52,408 INFO L226 Difference]: Without dead ends: 29681 [2021-07-09 18:41:52,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29681 states. [2021-07-09 18:41:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29681 to 23664. [2021-07-09 18:41:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23664 states, 23663 states have (on average 3.872628153657609) internal successors, (91638), 23663 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 91638 transitions. [2021-07-09 18:41:53,197 INFO L78 Accepts]: Start accepts. Automaton has 23664 states and 91638 transitions. Word has length 28 [2021-07-09 18:41:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:53,197 INFO L482 AbstractCegarLoop]: Abstraction has 23664 states and 91638 transitions. [2021-07-09 18:41:53,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 23664 states and 91638 transitions. [2021-07-09 18:41:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:53,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:53,245 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:53,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-07-09 18:41:53,446 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:53,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:53,446 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-07-09 18:41:53,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:53,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937467703] [2021-07-09 18:41:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:53,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:53,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937467703] [2021-07-09 18:41:53,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937467703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:53,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222469094] [2021-07-09 18:41:53,484 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 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 [2021-07-09 18:41:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:53,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:53,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222469094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:53,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:53,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:41:53,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289258533] [2021-07-09 18:41:53,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:53,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:53,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:53,572 INFO L87 Difference]: Start difference. First operand 23664 states and 91638 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) [2021-07-09 18:41:54,243 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 18:41:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:54,610 INFO L93 Difference]: Finished difference Result 34438 states and 127402 transitions. [2021-07-09 18:41:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:41:54,611 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 28 [2021-07-09 18:41:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:54,750 INFO L225 Difference]: With dead ends: 34438 [2021-07-09 18:41:54,750 INFO L226 Difference]: Without dead ends: 34438 [2021-07-09 18:41:54,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:41:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34438 states. [2021-07-09 18:41:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34438 to 25439. [2021-07-09 18:41:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25439 states, 25438 states have (on average 3.8818696438399245) internal successors, (98747), 25438 states have internal predecessors, (98747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25439 states to 25439 states and 98747 transitions. [2021-07-09 18:41:55,670 INFO L78 Accepts]: Start accepts. Automaton has 25439 states and 98747 transitions. Word has length 28 [2021-07-09 18:41:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:55,670 INFO L482 AbstractCegarLoop]: Abstraction has 25439 states and 98747 transitions. [2021-07-09 18:41:55,671 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) [2021-07-09 18:41:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 25439 states and 98747 transitions. [2021-07-09 18:41:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:55,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:55,714 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:55,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-07-09 18:41:55,915 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:55,915 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-07-09 18:41:55,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:55,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824436378] [2021-07-09 18:41:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:55,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:55,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824436378] [2021-07-09 18:41:55,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824436378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:55,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455218774] [2021-07-09 18:41:55,952 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 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 [2021-07-09 18:41:55,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:55,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:55,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:55,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:56,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455218774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:56,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:56,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:41:56,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036173089] [2021-07-09 18:41:56,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:56,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:56,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:56,036 INFO L87 Difference]: Start difference. First operand 25439 states and 98747 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) [2021-07-09 18:41:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:56,918 INFO L93 Difference]: Finished difference Result 32691 states and 122893 transitions. [2021-07-09 18:41:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:41:56,918 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 28 [2021-07-09 18:41:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:57,020 INFO L225 Difference]: With dead ends: 32691 [2021-07-09 18:41:57,020 INFO L226 Difference]: Without dead ends: 32679 [2021-07-09 18:41:57,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:41:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32679 states. [2021-07-09 18:41:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32679 to 25599. [2021-07-09 18:41:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25599 states, 25598 states have (on average 3.8770607078678023) internal successors, (99245), 25598 states have internal predecessors, (99245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25599 states to 25599 states and 99245 transitions. [2021-07-09 18:41:57,874 INFO L78 Accepts]: Start accepts. Automaton has 25599 states and 99245 transitions. Word has length 28 [2021-07-09 18:41:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:57,875 INFO L482 AbstractCegarLoop]: Abstraction has 25599 states and 99245 transitions. [2021-07-09 18:41:57,875 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) [2021-07-09 18:41:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 25599 states and 99245 transitions. [2021-07-09 18:41:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:58,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:58,084 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:58,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-07-09 18:41:58,284 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-07-09 18:41:58,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:58,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877211083] [2021-07-09 18:41:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:58,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:58,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877211083] [2021-07-09 18:41:58,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877211083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:58,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132658980] [2021-07-09 18:41:58,314 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 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 [2021-07-09 18:41:58,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:58,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:58,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132658980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:58,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:58,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:41:58,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407892463] [2021-07-09 18:41:58,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:58,392 INFO L87 Difference]: Start difference. First operand 25599 states and 99245 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-07-09 18:41:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:58,700 INFO L93 Difference]: Finished difference Result 30159 states and 114821 transitions. [2021-07-09 18:41:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:41:58,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-07-09 18:41:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:58,799 INFO L225 Difference]: With dead ends: 30159 [2021-07-09 18:41:58,800 INFO L226 Difference]: Without dead ends: 30159 [2021-07-09 18:41:58,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30159 states. [2021-07-09 18:41:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30159 to 26806. [2021-07-09 18:41:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 3.8731952993844434) internal successors, (103821), 26805 states have internal predecessors, (103821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 103821 transitions. [2021-07-09 18:41:59,650 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 103821 transitions. Word has length 28 [2021-07-09 18:41:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:59,650 INFO L482 AbstractCegarLoop]: Abstraction has 26806 states and 103821 transitions. [2021-07-09 18:41:59,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-07-09 18:41:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 103821 transitions. [2021-07-09 18:41:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:59,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:59,704 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:59,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-07-09 18:41:59,904 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-07-09 18:41:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:59,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075346636] [2021-07-09 18:41:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:59,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:59,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075346636] [2021-07-09 18:41:59,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075346636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:59,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151442840] [2021-07-09 18:41:59,944 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 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 [2021-07-09 18:41:59,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:59,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:59,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:00,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151442840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:00,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:00,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:42:00,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826177969] [2021-07-09 18:42:00,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:42:00,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:42:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:42:00,034 INFO L87 Difference]: Start difference. First operand 26806 states and 103821 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-09 18:42:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:00,995 INFO L93 Difference]: Finished difference Result 34754 states and 129602 transitions. [2021-07-09 18:42:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:42:00,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-09 18:42:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:01,119 INFO L225 Difference]: With dead ends: 34754 [2021-07-09 18:42:01,119 INFO L226 Difference]: Without dead ends: 34754 [2021-07-09 18:42:01,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:42:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34754 states. [2021-07-09 18:42:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34754 to 28000. [2021-07-09 18:42:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28000 states, 27999 states have (on average 3.8443515839851425) internal successors, (107638), 27999 states have internal predecessors, (107638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 107638 transitions. [2021-07-09 18:42:02,136 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 107638 transitions. Word has length 28 [2021-07-09 18:42:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:02,136 INFO L482 AbstractCegarLoop]: Abstraction has 28000 states and 107638 transitions. [2021-07-09 18:42:02,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-09 18:42:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 107638 transitions. [2021-07-09 18:42:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:02,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:02,192 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:02,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:02,393 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-07-09 18:42:02,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:02,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434102188] [2021-07-09 18:42:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:02,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:02,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434102188] [2021-07-09 18:42:02,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434102188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:02,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103293333] [2021-07-09 18:42:02,427 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 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 [2021-07-09 18:42:02,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:42:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:02,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103293333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:02,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:02,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:42:02,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371654495] [2021-07-09 18:42:02,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:02,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:02,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:02,510 INFO L87 Difference]: Start difference. First operand 28000 states and 107638 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) [2021-07-09 18:42:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:03,319 INFO L93 Difference]: Finished difference Result 33849 states and 127203 transitions. [2021-07-09 18:42:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:42:03,319 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 28 [2021-07-09 18:42:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:03,434 INFO L225 Difference]: With dead ends: 33849 [2021-07-09 18:42:03,434 INFO L226 Difference]: Without dead ends: 33841 [2021-07-09 18:42:03,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:42:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33841 states. [2021-07-09 18:42:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33841 to 27806. [2021-07-09 18:42:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27806 states, 27805 states have (on average 3.8502787268476895) internal successors, (107057), 27805 states have internal predecessors, (107057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27806 states to 27806 states and 107057 transitions. [2021-07-09 18:42:04,298 INFO L78 Accepts]: Start accepts. Automaton has 27806 states and 107057 transitions. Word has length 28 [2021-07-09 18:42:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:04,298 INFO L482 AbstractCegarLoop]: Abstraction has 27806 states and 107057 transitions. [2021-07-09 18:42:04,298 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) [2021-07-09 18:42:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 27806 states and 107057 transitions. [2021-07-09 18:42:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:04,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:04,353 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:04,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:04,554 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:04,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-07-09 18:42:04,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:04,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240361018] [2021-07-09 18:42:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:04,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:04,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240361018] [2021-07-09 18:42:04,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240361018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:04,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398768815] [2021-07-09 18:42:04,587 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 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 [2021-07-09 18:42:04,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:04,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:04,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:04,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:04,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398768815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:04,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:04,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:42:04,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420255683] [2021-07-09 18:42:04,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:04,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:04,839 INFO L87 Difference]: Start difference. First operand 27806 states and 107057 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) [2021-07-09 18:42:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:05,661 INFO L93 Difference]: Finished difference Result 35673 states and 132779 transitions. [2021-07-09 18:42:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:42:05,661 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 28 [2021-07-09 18:42:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:05,770 INFO L225 Difference]: With dead ends: 35673 [2021-07-09 18:42:05,770 INFO L226 Difference]: Without dead ends: 35673 [2021-07-09 18:42:05,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:42:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35673 states. [2021-07-09 18:42:06,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35673 to 28844. [2021-07-09 18:42:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28844 states, 28843 states have (on average 3.827618486287834) internal successors, (110400), 28843 states have internal predecessors, (110400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28844 states to 28844 states and 110400 transitions. [2021-07-09 18:42:06,688 INFO L78 Accepts]: Start accepts. Automaton has 28844 states and 110400 transitions. Word has length 28 [2021-07-09 18:42:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:06,689 INFO L482 AbstractCegarLoop]: Abstraction has 28844 states and 110400 transitions. [2021-07-09 18:42:06,689 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) [2021-07-09 18:42:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 28844 states and 110400 transitions. [2021-07-09 18:42:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:06,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:06,744 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:06,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:06,946 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:06,946 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-07-09 18:42:06,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:06,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556481565] [2021-07-09 18:42:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:06,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556481565] [2021-07-09 18:42:06,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556481565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977667462] [2021-07-09 18:42:06,980 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 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 [2021-07-09 18:42:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:42:07,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:07,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977667462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:07,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:07,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:42:07,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248251944] [2021-07-09 18:42:07,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:42:07,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:42:07,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:42:07,060 INFO L87 Difference]: Start difference. First operand 28844 states and 110400 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:42:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:07,763 INFO L93 Difference]: Finished difference Result 35179 states and 133683 transitions. [2021-07-09 18:42:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:42:07,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-09 18:42:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:07,888 INFO L225 Difference]: With dead ends: 35179 [2021-07-09 18:42:07,888 INFO L226 Difference]: Without dead ends: 35166 [2021-07-09 18:42:07,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:42:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35166 states. [2021-07-09 18:42:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35166 to 33639. [2021-07-09 18:42:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33639 states, 33638 states have (on average 3.8427968369106367) internal successors, (129264), 33638 states have internal predecessors, (129264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33639 states to 33639 states and 129264 transitions. [2021-07-09 18:42:09,004 INFO L78 Accepts]: Start accepts. Automaton has 33639 states and 129264 transitions. Word has length 28 [2021-07-09 18:42:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:09,004 INFO L482 AbstractCegarLoop]: Abstraction has 33639 states and 129264 transitions. [2021-07-09 18:42:09,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:42:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 33639 states and 129264 transitions. [2021-07-09 18:42:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:09,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:09,070 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:09,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4050,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:09,271 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-07-09 18:42:09,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:09,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593553784] [2021-07-09 18:42:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:09,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593553784] [2021-07-09 18:42:09,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593553784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777196217] [2021-07-09 18:42:09,305 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 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 [2021-07-09 18:42:09,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:09,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:09,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:42:09,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:09,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777196217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:09,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:09,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:42:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784854556] [2021-07-09 18:42:09,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:42:09,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:42:09,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:42:09,384 INFO L87 Difference]: Start difference. First operand 33639 states and 129264 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:42:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:10,056 INFO L93 Difference]: Finished difference Result 36796 states and 139166 transitions. [2021-07-09 18:42:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:42:10,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-09 18:42:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:10,188 INFO L225 Difference]: With dead ends: 36796 [2021-07-09 18:42:10,188 INFO L226 Difference]: Without dead ends: 36796 [2021-07-09 18:42:10,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:42:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36796 states. [2021-07-09 18:42:11,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36796 to 33316. [2021-07-09 18:42:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33316 states, 33315 states have (on average 3.839021461803992) internal successors, (127897), 33315 states have internal predecessors, (127897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33316 states to 33316 states and 127897 transitions. [2021-07-09 18:42:11,253 INFO L78 Accepts]: Start accepts. Automaton has 33316 states and 127897 transitions. Word has length 28 [2021-07-09 18:42:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:11,254 INFO L482 AbstractCegarLoop]: Abstraction has 33316 states and 127897 transitions. [2021-07-09 18:42:11,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:42:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 33316 states and 127897 transitions. [2021-07-09 18:42:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:11,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:11,532 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:11,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-07-09 18:42:11,749 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:11,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-07-09 18:42:11,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:11,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264921909] [2021-07-09 18:42:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:11,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264921909] [2021-07-09 18:42:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264921909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183147376] [2021-07-09 18:42:11,782 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 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 [2021-07-09 18:42:11,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:11,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:11,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:11,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183147376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:11,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:11,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:42:11,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971517889] [2021-07-09 18:42:11,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:11,874 INFO L87 Difference]: Start difference. First operand 33316 states and 127897 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) [2021-07-09 18:42:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:12,590 INFO L93 Difference]: Finished difference Result 39856 states and 149676 transitions. [2021-07-09 18:42:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:42:12,591 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 28 [2021-07-09 18:42:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:12,911 INFO L225 Difference]: With dead ends: 39856 [2021-07-09 18:42:12,911 INFO L226 Difference]: Without dead ends: 39848 [2021-07-09 18:42:12,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:42:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-07-09 18:42:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 33282. [2021-07-09 18:42:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33282 states, 33281 states have (on average 3.839427901805835) internal successors, (127780), 33281 states have internal predecessors, (127780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33282 states to 33282 states and 127780 transitions. [2021-07-09 18:42:13,843 INFO L78 Accepts]: Start accepts. Automaton has 33282 states and 127780 transitions. Word has length 28 [2021-07-09 18:42:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:13,843 INFO L482 AbstractCegarLoop]: Abstraction has 33282 states and 127780 transitions. [2021-07-09 18:42:13,844 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) [2021-07-09 18:42:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 33282 states and 127780 transitions. [2021-07-09 18:42:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:13,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:13,912 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:14,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:14,112 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-07-09 18:42:14,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:14,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166173836] [2021-07-09 18:42:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:14,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:14,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166173836] [2021-07-09 18:42:14,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166173836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:14,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992730701] [2021-07-09 18:42:14,147 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 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 [2021-07-09 18:42:14,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:14,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:42:14,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992730701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:14,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:14,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:42:14,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937793939] [2021-07-09 18:42:14,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:42:14,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:42:14,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:42:14,424 INFO L87 Difference]: Start difference. First operand 33282 states and 127780 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:42:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:14,946 INFO L93 Difference]: Finished difference Result 36198 states and 137505 transitions. [2021-07-09 18:42:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:42:14,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-09 18:42:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:15,077 INFO L225 Difference]: With dead ends: 36198 [2021-07-09 18:42:15,077 INFO L226 Difference]: Without dead ends: 36198 [2021-07-09 18:42:15,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:42:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36198 states. [2021-07-09 18:42:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36198 to 33814. [2021-07-09 18:42:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 3.837695560878952) internal successors, (129764), 33813 states have internal predecessors, (129764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 129764 transitions. [2021-07-09 18:42:16,116 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 129764 transitions. Word has length 28 [2021-07-09 18:42:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:16,116 INFO L482 AbstractCegarLoop]: Abstraction has 33814 states and 129764 transitions. [2021-07-09 18:42:16,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:42:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 129764 transitions. [2021-07-09 18:42:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:16,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:16,190 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:16,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-07-09 18:42:16,390 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-07-09 18:42:16,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:16,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936545751] [2021-07-09 18:42:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:16,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:16,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936545751] [2021-07-09 18:42:16,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936545751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:16,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233972495] [2021-07-09 18:42:16,425 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 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 [2021-07-09 18:42:16,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:42:16,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:16,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:16,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:16,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233972495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:16,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:16,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:42:16,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249604796] [2021-07-09 18:42:16,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:16,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:16,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:16,521 INFO L87 Difference]: Start difference. First operand 33814 states and 129764 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) [2021-07-09 18:42:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:17,394 INFO L93 Difference]: Finished difference Result 40833 states and 153241 transitions. [2021-07-09 18:42:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:42:17,394 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 28 [2021-07-09 18:42:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:17,547 INFO L225 Difference]: With dead ends: 40833 [2021-07-09 18:42:17,547 INFO L226 Difference]: Without dead ends: 40809 [2021-07-09 18:42:17,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:42:17,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40809 states. [2021-07-09 18:42:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40809 to 33986. [2021-07-09 18:42:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33986 states, 33985 states have (on average 3.8339855818743565) internal successors, (130298), 33985 states have internal predecessors, (130298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33986 states to 33986 states and 130298 transitions. [2021-07-09 18:42:18,722 INFO L78 Accepts]: Start accepts. Automaton has 33986 states and 130298 transitions. Word has length 28 [2021-07-09 18:42:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:18,722 INFO L482 AbstractCegarLoop]: Abstraction has 33986 states and 130298 transitions. [2021-07-09 18:42:18,722 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) [2021-07-09 18:42:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 33986 states and 130298 transitions. [2021-07-09 18:42:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:18,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:18,797 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:18,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-07-09 18:42:18,997 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-07-09 18:42:18,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:18,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615661496] [2021-07-09 18:42:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:19,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:19,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615661496] [2021-07-09 18:42:19,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615661496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:19,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812593995] [2021-07-09 18:42:19,039 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 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 [2021-07-09 18:42:19,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:42:19,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:19,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:42:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:19,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812593995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:19,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:19,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 18:42:19,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781193425] [2021-07-09 18:42:19,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:19,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:19,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:19,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:19,120 INFO L87 Difference]: Start difference. First operand 33986 states and 130298 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:42:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:19,835 INFO L93 Difference]: Finished difference Result 36618 states and 138998 transitions. [2021-07-09 18:42:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:42:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-07-09 18:42:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:19,967 INFO L225 Difference]: With dead ends: 36618 [2021-07-09 18:42:19,967 INFO L226 Difference]: Without dead ends: 36618 [2021-07-09 18:42:19,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:42:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2021-07-09 18:42:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 33912. [2021-07-09 18:42:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33912 states, 33911 states have (on average 3.8348028663265605) internal successors, (130042), 33911 states have internal predecessors, (130042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33912 states to 33912 states and 130042 transitions. [2021-07-09 18:42:21,182 INFO L78 Accepts]: Start accepts. Automaton has 33912 states and 130042 transitions. Word has length 28 [2021-07-09 18:42:21,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:21,183 INFO L482 AbstractCegarLoop]: Abstraction has 33912 states and 130042 transitions. [2021-07-09 18:42:21,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:42:21,183 INFO L276 IsEmpty]: Start isEmpty. Operand 33912 states and 130042 transitions. [2021-07-09 18:42:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:21,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:21,276 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:21,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-07-09 18:42:21,476 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:21,476 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-07-09 18:42:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:21,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722205868] [2021-07-09 18:42:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:21,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:21,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722205868] [2021-07-09 18:42:21,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722205868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:21,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470793598] [2021-07-09 18:42:21,522 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 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 [2021-07-09 18:42:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:21,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:21,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:21,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470793598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:21,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:21,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:42:21,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347370569] [2021-07-09 18:42:21,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:42:21,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:42:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:42:21,607 INFO L87 Difference]: Start difference. First operand 33912 states and 130042 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-09 18:42:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:22,540 INFO L93 Difference]: Finished difference Result 40756 states and 152982 transitions. [2021-07-09 18:42:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:42:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-07-09 18:42:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:22,692 INFO L225 Difference]: With dead ends: 40756 [2021-07-09 18:42:22,692 INFO L226 Difference]: Without dead ends: 40716 [2021-07-09 18:42:22,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:42:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40716 states. [2021-07-09 18:42:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40716 to 34086. [2021-07-09 18:42:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34086 states, 34085 states have (on average 3.8309813701041513) internal successors, (130579), 34085 states have internal predecessors, (130579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34086 states to 34086 states and 130579 transitions. [2021-07-09 18:42:23,915 INFO L78 Accepts]: Start accepts. Automaton has 34086 states and 130579 transitions. Word has length 28 [2021-07-09 18:42:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:23,915 INFO L482 AbstractCegarLoop]: Abstraction has 34086 states and 130579 transitions. [2021-07-09 18:42:23,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-07-09 18:42:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 34086 states and 130579 transitions. [2021-07-09 18:42:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:24,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:24,212 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:24,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-07-09 18:42:24,429 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:24,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-07-09 18:42:24,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:24,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066039253] [2021-07-09 18:42:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:24,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:24,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066039253] [2021-07-09 18:42:24,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066039253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:24,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972301324] [2021-07-09 18:42:24,463 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 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 [2021-07-09 18:42:24,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:24,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:24,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:24,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:24,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972301324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:24,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:24,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:24,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622578718] [2021-07-09 18:42:24,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:24,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:24,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:24,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:24,613 INFO L87 Difference]: Start difference. First operand 34086 states and 130579 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:42:25,866 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-09 18:42:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:26,215 INFO L93 Difference]: Finished difference Result 76027 states and 281494 transitions. [2021-07-09 18:42:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:42:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:26,526 INFO L225 Difference]: With dead ends: 76027 [2021-07-09 18:42:26,526 INFO L226 Difference]: Without dead ends: 76027 [2021-07-09 18:42:26,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:42:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76027 states. [2021-07-09 18:42:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76027 to 43183. [2021-07-09 18:42:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43183 states, 43182 states have (on average 3.906581445972859) internal successors, (168694), 43182 states have internal predecessors, (168694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43183 states to 43183 states and 168694 transitions. [2021-07-09 18:42:28,499 INFO L78 Accepts]: Start accepts. Automaton has 43183 states and 168694 transitions. Word has length 28 [2021-07-09 18:42:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:28,499 INFO L482 AbstractCegarLoop]: Abstraction has 43183 states and 168694 transitions. [2021-07-09 18:42:28,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:42:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 43183 states and 168694 transitions. [2021-07-09 18:42:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:28,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:28,581 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:28,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-09 18:42:28,782 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:28,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-07-09 18:42:28,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:28,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695762384] [2021-07-09 18:42:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:28,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:28,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695762384] [2021-07-09 18:42:28,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695762384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:28,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675630188] [2021-07-09 18:42:28,815 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 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 [2021-07-09 18:42:28,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:28,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:28,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675630188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:28,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:28,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:28,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779476035] [2021-07-09 18:42:28,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:28,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:28,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:28,948 INFO L87 Difference]: Start difference. First operand 43183 states and 168694 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:42:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:30,783 INFO L93 Difference]: Finished difference Result 75388 states and 279801 transitions. [2021-07-09 18:42:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:42:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:31,054 INFO L225 Difference]: With dead ends: 75388 [2021-07-09 18:42:31,055 INFO L226 Difference]: Without dead ends: 75388 [2021-07-09 18:42:31,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:42:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75388 states. [2021-07-09 18:42:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75388 to 43180. [2021-07-09 18:42:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43180 states, 43179 states have (on average 3.906528636605757) internal successors, (168680), 43179 states have internal predecessors, (168680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43180 states to 43180 states and 168680 transitions. [2021-07-09 18:42:33,106 INFO L78 Accepts]: Start accepts. Automaton has 43180 states and 168680 transitions. Word has length 28 [2021-07-09 18:42:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:33,106 INFO L482 AbstractCegarLoop]: Abstraction has 43180 states and 168680 transitions. [2021-07-09 18:42:33,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:42:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 43180 states and 168680 transitions. [2021-07-09 18:42:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:33,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:33,197 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:33,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:33,399 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:33,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-07-09 18:42:33,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:33,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811201070] [2021-07-09 18:42:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:33,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:33,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811201070] [2021-07-09 18:42:33,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811201070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:33,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784314868] [2021-07-09 18:42:33,444 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 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 [2021-07-09 18:42:33,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:33,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:33,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:33,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784314868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:33,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:33,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:42:33,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640092972] [2021-07-09 18:42:33,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:42:33,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:42:33,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:42:33,572 INFO L87 Difference]: Start difference. First operand 43180 states and 168680 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:42:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:35,335 INFO L93 Difference]: Finished difference Result 69979 states and 261702 transitions. [2021-07-09 18:42:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:42:35,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-09 18:42:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:35,641 INFO L225 Difference]: With dead ends: 69979 [2021-07-09 18:42:35,641 INFO L226 Difference]: Without dead ends: 69979 [2021-07-09 18:42:35,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:42:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69979 states. [2021-07-09 18:42:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69979 to 43204. [2021-07-09 18:42:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9067657338610746) internal successors, (168784), 43203 states have internal predecessors, (168784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168784 transitions. [2021-07-09 18:42:37,753 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168784 transitions. Word has length 28 [2021-07-09 18:42:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:37,753 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168784 transitions. [2021-07-09 18:42:37,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:42:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168784 transitions. [2021-07-09 18:42:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:37,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:37,836 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:38,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:38,036 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:38,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-07-09 18:42:38,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:38,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044280411] [2021-07-09 18:42:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:38,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:38,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044280411] [2021-07-09 18:42:38,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044280411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:38,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020576422] [2021-07-09 18:42:38,071 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 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 [2021-07-09 18:42:38,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:42:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020576422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:38,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:38,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:42:38,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839391080] [2021-07-09 18:42:38,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:42:38,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:42:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:42:38,189 INFO L87 Difference]: Start difference. First operand 43204 states and 168784 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:42:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:39,623 INFO L93 Difference]: Finished difference Result 69094 states and 259411 transitions. [2021-07-09 18:42:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:42:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-09 18:42:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:39,908 INFO L225 Difference]: With dead ends: 69094 [2021-07-09 18:42:39,909 INFO L226 Difference]: Without dead ends: 69086 [2021-07-09 18:42:39,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 525.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:42:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69086 states. [2021-07-09 18:42:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69086 to 43204. [2021-07-09 18:42:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9066268546165777) internal successors, (168778), 43203 states have internal predecessors, (168778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168778 transitions. [2021-07-09 18:42:41,831 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168778 transitions. Word has length 28 [2021-07-09 18:42:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:41,831 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168778 transitions. [2021-07-09 18:42:41,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:42:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168778 transitions. [2021-07-09 18:42:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:41,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:41,914 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:42,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:42,114 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:42,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-07-09 18:42:42,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:42,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971754098] [2021-07-09 18:42:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:42,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:42,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971754098] [2021-07-09 18:42:42,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971754098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:42,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351745551] [2021-07-09 18:42:42,148 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 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 [2021-07-09 18:42:42,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:42,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:42,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351745551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:42,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:42,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:42,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774103195] [2021-07-09 18:42:42,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:42,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:42,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:42,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:42,525 INFO L87 Difference]: Start difference. First operand 43204 states and 168778 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) [2021-07-09 18:42:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:44,022 INFO L93 Difference]: Finished difference Result 68768 states and 258526 transitions. [2021-07-09 18:42:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:42:44,023 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 28 [2021-07-09 18:42:44,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:44,259 INFO L225 Difference]: With dead ends: 68768 [2021-07-09 18:42:44,259 INFO L226 Difference]: Without dead ends: 68768 [2021-07-09 18:42:44,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:42:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68768 states. [2021-07-09 18:42:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68768 to 43212. [2021-07-09 18:42:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.9066904260489226) internal successors, (168812), 43211 states have internal predecessors, (168812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168812 transitions. [2021-07-09 18:42:46,153 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168812 transitions. Word has length 28 [2021-07-09 18:42:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:46,153 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168812 transitions. [2021-07-09 18:42:46,153 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) [2021-07-09 18:42:46,153 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168812 transitions. [2021-07-09 18:42:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:46,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:46,236 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:46,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-07-09 18:42:46,437 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-07-09 18:42:46,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:46,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774238121] [2021-07-09 18:42:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:46,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:46,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774238121] [2021-07-09 18:42:46,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774238121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:46,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192921800] [2021-07-09 18:42:46,472 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 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 [2021-07-09 18:42:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:46,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192921800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:46,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:46,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:46,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97759811] [2021-07-09 18:42:46,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:46,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:46,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:46,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:46,597 INFO L87 Difference]: Start difference. First operand 43212 states and 168812 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) [2021-07-09 18:42:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:47,984 INFO L93 Difference]: Finished difference Result 68557 states and 258000 transitions. [2021-07-09 18:42:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:42:47,984 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 28 [2021-07-09 18:42:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:48,476 INFO L225 Difference]: With dead ends: 68557 [2021-07-09 18:42:48,477 INFO L226 Difference]: Without dead ends: 68549 [2021-07-09 18:42:48,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 714.9ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:42:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2021-07-09 18:42:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 43212. [2021-07-09 18:42:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.906644141538034) internal successors, (168810), 43211 states have internal predecessors, (168810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168810 transitions. [2021-07-09 18:42:50,151 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168810 transitions. Word has length 28 [2021-07-09 18:42:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:50,151 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168810 transitions. [2021-07-09 18:42:50,151 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) [2021-07-09 18:42:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168810 transitions. [2021-07-09 18:42:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:50,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:50,237 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:50,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:50,437 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:50,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-07-09 18:42:50,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:50,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974622771] [2021-07-09 18:42:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:50,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:50,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974622771] [2021-07-09 18:42:50,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974622771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:50,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324084822] [2021-07-09 18:42:50,472 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 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 [2021-07-09 18:42:50,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:50,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:50,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324084822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:50,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:50,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:50,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239684332] [2021-07-09 18:42:50,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:50,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:50,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:50,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:50,584 INFO L87 Difference]: Start difference. First operand 43212 states and 168810 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:42:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:52,381 INFO L93 Difference]: Finished difference Result 67982 states and 254698 transitions. [2021-07-09 18:42:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:52,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:42:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:52,645 INFO L225 Difference]: With dead ends: 67982 [2021-07-09 18:42:52,645 INFO L226 Difference]: Without dead ends: 67982 [2021-07-09 18:42:52,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 877.9ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:42:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67982 states. [2021-07-09 18:42:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67982 to 46442. [2021-07-09 18:42:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46442 states, 46441 states have (on average 3.9102086518378156) internal successors, (181594), 46441 states have internal predecessors, (181594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46442 states to 46442 states and 181594 transitions. [2021-07-09 18:42:54,653 INFO L78 Accepts]: Start accepts. Automaton has 46442 states and 181594 transitions. Word has length 28 [2021-07-09 18:42:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:54,653 INFO L482 AbstractCegarLoop]: Abstraction has 46442 states and 181594 transitions. [2021-07-09 18:42:54,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:42:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46442 states and 181594 transitions. [2021-07-09 18:42:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:54,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:54,743 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:54,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-07-09 18:42:54,943 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:54,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-07-09 18:42:54,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:54,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197142372] [2021-07-09 18:42:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:54,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:54,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197142372] [2021-07-09 18:42:54,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197142372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:54,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38067807] [2021-07-09 18:42:54,978 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 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 [2021-07-09 18:42:55,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:42:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:55,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38067807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:55,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:55,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:55,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618255141] [2021-07-09 18:42:55,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:55,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:55,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:55,085 INFO L87 Difference]: Start difference. First operand 46442 states and 181594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:42:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:56,446 INFO L93 Difference]: Finished difference Result 67509 states and 253442 transitions. [2021-07-09 18:42:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:42:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:42:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:56,940 INFO L225 Difference]: With dead ends: 67509 [2021-07-09 18:42:56,940 INFO L226 Difference]: Without dead ends: 67501 [2021-07-09 18:42:56,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 719.1ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:42:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67501 states. [2021-07-09 18:42:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67501 to 46136. [2021-07-09 18:42:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46136 states, 46135 states have (on average 3.9156172103608973) internal successors, (180647), 46135 states have internal predecessors, (180647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46136 states to 46136 states and 180647 transitions. [2021-07-09 18:42:58,714 INFO L78 Accepts]: Start accepts. Automaton has 46136 states and 180647 transitions. Word has length 28 [2021-07-09 18:42:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:58,715 INFO L482 AbstractCegarLoop]: Abstraction has 46136 states and 180647 transitions. [2021-07-09 18:42:58,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:42:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 46136 states and 180647 transitions. [2021-07-09 18:42:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:59,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:59,081 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:59,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-07-09 18:42:59,282 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:59,282 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-07-09 18:42:59,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:59,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850705856] [2021-07-09 18:42:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:59,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:59,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850705856] [2021-07-09 18:42:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850705856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:59,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282444415] [2021-07-09 18:42:59,316 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 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 [2021-07-09 18:42:59,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:59,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:59,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282444415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:59,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:59,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670668695] [2021-07-09 18:42:59,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:59,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:59,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:59,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:59,419 INFO L87 Difference]: Start difference. First operand 46136 states and 180647 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:43:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:00,660 INFO L93 Difference]: Finished difference Result 65985 states and 249225 transitions. [2021-07-09 18:43:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:43:00,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:43:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:00,913 INFO L225 Difference]: With dead ends: 65985 [2021-07-09 18:43:00,913 INFO L226 Difference]: Without dead ends: 65961 [2021-07-09 18:43:00,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:43:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65961 states. [2021-07-09 18:43:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65961 to 46032. [2021-07-09 18:43:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46032 states, 46031 states have (on average 3.915600356281636) internal successors, (180239), 46031 states have internal predecessors, (180239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46032 states to 46032 states and 180239 transitions. [2021-07-09 18:43:02,873 INFO L78 Accepts]: Start accepts. Automaton has 46032 states and 180239 transitions. Word has length 28 [2021-07-09 18:43:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:02,873 INFO L482 AbstractCegarLoop]: Abstraction has 46032 states and 180239 transitions. [2021-07-09 18:43:02,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:43:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 46032 states and 180239 transitions. [2021-07-09 18:43:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:02,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:02,966 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:03,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4065,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:03,166 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:03,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-07-09 18:43:03,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:03,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656609446] [2021-07-09 18:43:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:03,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:03,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656609446] [2021-07-09 18:43:03,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656609446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:03,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291928803] [2021-07-09 18:43:03,207 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 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 [2021-07-09 18:43:03,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:43:03,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:03,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:03,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291928803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:03,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:03,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:43:03,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616376167] [2021-07-09 18:43:03,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:03,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:03,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:03,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:03,336 INFO L87 Difference]: Start difference. First operand 46032 states and 180239 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) [2021-07-09 18:43:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:04,819 INFO L93 Difference]: Finished difference Result 67202 states and 252555 transitions. [2021-07-09 18:43:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:43:04,819 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 28 [2021-07-09 18:43:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:05,294 INFO L225 Difference]: With dead ends: 67202 [2021-07-09 18:43:05,294 INFO L226 Difference]: Without dead ends: 67202 [2021-07-09 18:43:05,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 626.1ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:43:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67202 states. [2021-07-09 18:43:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67202 to 46128. [2021-07-09 18:43:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46128 states, 46127 states have (on average 3.9142584603377633) internal successors, (180553), 46127 states have internal predecessors, (180553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46128 states to 46128 states and 180553 transitions. [2021-07-09 18:43:06,973 INFO L78 Accepts]: Start accepts. Automaton has 46128 states and 180553 transitions. Word has length 28 [2021-07-09 18:43:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:06,973 INFO L482 AbstractCegarLoop]: Abstraction has 46128 states and 180553 transitions. [2021-07-09 18:43:06,973 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) [2021-07-09 18:43:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 46128 states and 180553 transitions. [2021-07-09 18:43:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:07,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:07,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:07,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-09 18:43:07,261 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:07,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-07-09 18:43:07,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:07,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971867570] [2021-07-09 18:43:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:07,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:07,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971867570] [2021-07-09 18:43:07,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971867570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349734176] [2021-07-09 18:43:07,297 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 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 [2021-07-09 18:43:07,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:43:07,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:07,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:07,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:07,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349734176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:07,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:07,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:43:07,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172014182] [2021-07-09 18:43:07,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:07,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:07,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:07,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:07,652 INFO L87 Difference]: Start difference. First operand 46128 states and 180553 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) [2021-07-09 18:43:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:09,134 INFO L93 Difference]: Finished difference Result 66883 states and 251651 transitions. [2021-07-09 18:43:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:43:09,135 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 28 [2021-07-09 18:43:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:09,400 INFO L225 Difference]: With dead ends: 66883 [2021-07-09 18:43:09,401 INFO L226 Difference]: Without dead ends: 66875 [2021-07-09 18:43:09,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:43:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66875 states. [2021-07-09 18:43:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66875 to 46060. [2021-07-09 18:43:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46060 states, 46059 states have (on average 3.9154345513363293) internal successors, (180341), 46059 states have internal predecessors, (180341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46060 states to 46060 states and 180341 transitions. [2021-07-09 18:43:11,426 INFO L78 Accepts]: Start accepts. Automaton has 46060 states and 180341 transitions. Word has length 28 [2021-07-09 18:43:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:11,426 INFO L482 AbstractCegarLoop]: Abstraction has 46060 states and 180341 transitions. [2021-07-09 18:43:11,426 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) [2021-07-09 18:43:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 46060 states and 180341 transitions. [2021-07-09 18:43:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:11,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:11,521 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:11,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-09 18:43:11,722 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-07-09 18:43:11,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:11,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925434727] [2021-07-09 18:43:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:11,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:11,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925434727] [2021-07-09 18:43:11,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925434727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:11,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607048123] [2021-07-09 18:43:11,757 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 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 [2021-07-09 18:43:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:11,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607048123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:11,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:11,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:43:11,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915659793] [2021-07-09 18:43:11,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:43:11,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:11,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:43:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:43:11,870 INFO L87 Difference]: Start difference. First operand 46060 states and 180341 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:43:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:13,037 INFO L93 Difference]: Finished difference Result 65614 states and 248140 transitions. [2021-07-09 18:43:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:13,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-09 18:43:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:13,298 INFO L225 Difference]: With dead ends: 65614 [2021-07-09 18:43:13,298 INFO L226 Difference]: Without dead ends: 65590 [2021-07-09 18:43:13,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:43:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65590 states. [2021-07-09 18:43:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65590 to 46036. [2021-07-09 18:43:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46036 states, 46035 states have (on average 3.915564244596503) internal successors, (180253), 46035 states have internal predecessors, (180253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46036 states to 46036 states and 180253 transitions. [2021-07-09 18:43:15,269 INFO L78 Accepts]: Start accepts. Automaton has 46036 states and 180253 transitions. Word has length 28 [2021-07-09 18:43:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:15,269 INFO L482 AbstractCegarLoop]: Abstraction has 46036 states and 180253 transitions. [2021-07-09 18:43:15,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-09 18:43:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 46036 states and 180253 transitions. [2021-07-09 18:43:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:15,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:15,365 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:15,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-07-09 18:43:15,565 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:15,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-07-09 18:43:15,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:15,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835620959] [2021-07-09 18:43:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:15,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:15,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835620959] [2021-07-09 18:43:15,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835620959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816802405] [2021-07-09 18:43:15,605 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 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 [2021-07-09 18:43:15,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:15,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:15,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816802405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:15,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:43:15,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951986172] [2021-07-09 18:43:15,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:43:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:15,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:43:15,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:43:15,710 INFO L87 Difference]: Start difference. First operand 46036 states and 180253 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) [2021-07-09 18:43:17,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:17,850 INFO L93 Difference]: Finished difference Result 68913 states and 257576 transitions. [2021-07-09 18:43:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:43:17,851 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 28 [2021-07-09 18:43:17,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:18,200 INFO L225 Difference]: With dead ends: 68913 [2021-07-09 18:43:18,200 INFO L226 Difference]: Without dead ends: 68913 [2021-07-09 18:43:18,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1127.3ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:43:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68913 states. [2021-07-09 18:43:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68913 to 50828. [2021-07-09 18:43:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50828 states, 50827 states have (on average 3.8652881342593504) internal successors, (196461), 50827 states have internal predecessors, (196461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 196461 transitions. [2021-07-09 18:43:20,343 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 196461 transitions. Word has length 28 [2021-07-09 18:43:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:20,343 INFO L482 AbstractCegarLoop]: Abstraction has 50828 states and 196461 transitions. [2021-07-09 18:43:20,343 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) [2021-07-09 18:43:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 196461 transitions. [2021-07-09 18:43:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:20,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:20,442 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:20,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:20,642 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:20,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-07-09 18:43:20,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:20,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72476467] [2021-07-09 18:43:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:20,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:20,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72476467] [2021-07-09 18:43:20,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72476467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:20,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373621852] [2021-07-09 18:43:20,683 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 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 [2021-07-09 18:43:20,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:43:20,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:20,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:20,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373621852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:20,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:20,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:43:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050693403] [2021-07-09 18:43:20,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:43:20,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:43:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:43:20,781 INFO L87 Difference]: Start difference. First operand 50828 states and 196461 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) [2021-07-09 18:43:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:22,638 INFO L93 Difference]: Finished difference Result 68143 states and 255462 transitions. [2021-07-09 18:43:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:43:22,638 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 28 [2021-07-09 18:43:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:22,884 INFO L225 Difference]: With dead ends: 68143 [2021-07-09 18:43:22,885 INFO L226 Difference]: Without dead ends: 68135 [2021-07-09 18:43:22,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:43:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68135 states. [2021-07-09 18:43:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68135 to 49664. [2021-07-09 18:43:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49664 states, 49663 states have (on average 3.8827900046312145) internal successors, (192831), 49663 states have internal predecessors, (192831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49664 states to 49664 states and 192831 transitions. [2021-07-09 18:43:24,998 INFO L78 Accepts]: Start accepts. Automaton has 49664 states and 192831 transitions. Word has length 28 [2021-07-09 18:43:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:24,998 INFO L482 AbstractCegarLoop]: Abstraction has 49664 states and 192831 transitions. [2021-07-09 18:43:24,998 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) [2021-07-09 18:43:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 49664 states and 192831 transitions. [2021-07-09 18:43:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:25,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:25,097 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:25,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-07-09 18:43:25,297 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:25,298 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-07-09 18:43:25,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:25,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089471507] [2021-07-09 18:43:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:25,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:25,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089471507] [2021-07-09 18:43:25,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089471507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:25,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037417547] [2021-07-09 18:43:25,338 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 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 [2021-07-09 18:43:25,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:25,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:25,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037417547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:25,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:25,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:43:25,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977104927] [2021-07-09 18:43:25,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:43:25,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:43:25,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:43:25,432 INFO L87 Difference]: Start difference. First operand 49664 states and 192831 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) [2021-07-09 18:43:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:27,128 INFO L93 Difference]: Finished difference Result 66443 states and 250710 transitions. [2021-07-09 18:43:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:43:27,128 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 28 [2021-07-09 18:43:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:27,395 INFO L225 Difference]: With dead ends: 66443 [2021-07-09 18:43:27,395 INFO L226 Difference]: Without dead ends: 66419 [2021-07-09 18:43:27,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 620.3ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:43:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66419 states. [2021-07-09 18:43:29,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66419 to 49644. [2021-07-09 18:43:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49644 states, 49643 states have (on average 3.8810507020123683) internal successors, (192667), 49643 states have internal predecessors, (192667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49644 states to 49644 states and 192667 transitions. [2021-07-09 18:43:29,537 INFO L78 Accepts]: Start accepts. Automaton has 49644 states and 192667 transitions. Word has length 28 [2021-07-09 18:43:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:29,537 INFO L482 AbstractCegarLoop]: Abstraction has 49644 states and 192667 transitions. [2021-07-09 18:43:29,537 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) [2021-07-09 18:43:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 49644 states and 192667 transitions. [2021-07-09 18:43:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:29,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:29,642 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:29,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:29,843 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-07-09 18:43:29,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:29,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061163681] [2021-07-09 18:43:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:29,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061163681] [2021-07-09 18:43:29,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061163681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131705862] [2021-07-09 18:43:29,884 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 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 [2021-07-09 18:43:29,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:43:29,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:29,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:29,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131705862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:29,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:43:29,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327081118] [2021-07-09 18:43:29,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:43:29,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:29,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:43:29,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:43:29,981 INFO L87 Difference]: Start difference. First operand 49644 states and 192667 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) [2021-07-09 18:43:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:31,395 INFO L93 Difference]: Finished difference Result 67813 states and 254591 transitions. [2021-07-09 18:43:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:43:31,395 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 28 [2021-07-09 18:43:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:31,653 INFO L225 Difference]: With dead ends: 67813 [2021-07-09 18:43:31,654 INFO L226 Difference]: Without dead ends: 67773 [2021-07-09 18:43:31,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:43:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67773 states. [2021-07-09 18:43:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67773 to 49798. [2021-07-09 18:43:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49798 states, 49797 states have (on average 3.880394401269153) internal successors, (193232), 49797 states have internal predecessors, (193232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 193232 transitions. [2021-07-09 18:43:33,733 INFO L78 Accepts]: Start accepts. Automaton has 49798 states and 193232 transitions. Word has length 28 [2021-07-09 18:43:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:33,733 INFO L482 AbstractCegarLoop]: Abstraction has 49798 states and 193232 transitions. [2021-07-09 18:43:33,733 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) [2021-07-09 18:43:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 49798 states and 193232 transitions. [2021-07-09 18:43:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:33,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:33,830 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:34,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-07-09 18:43:34,033 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-07-09 18:43:34,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:34,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997190505] [2021-07-09 18:43:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:34,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:34,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997190505] [2021-07-09 18:43:34,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997190505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:34,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736084502] [2021-07-09 18:43:34,074 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 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 [2021-07-09 18:43:34,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:43:34,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:34,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:34,422 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-09 18:43:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:34,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736084502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:34,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:34,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:43:34,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885464966] [2021-07-09 18:43:34,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:34,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:34,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:34,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:34,457 INFO L87 Difference]: Start difference. First operand 49798 states and 193232 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-07-09 18:43:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:36,229 INFO L93 Difference]: Finished difference Result 66932 states and 251929 transitions. [2021-07-09 18:43:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:43:36,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-07-09 18:43:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:36,484 INFO L225 Difference]: With dead ends: 66932 [2021-07-09 18:43:36,484 INFO L226 Difference]: Without dead ends: 66932 [2021-07-09 18:43:36,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:43:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66932 states. [2021-07-09 18:43:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66932 to 50703. [2021-07-09 18:43:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50703 states, 50702 states have (on average 3.871701313557651) internal successors, (196303), 50702 states have internal predecessors, (196303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50703 states to 50703 states and 196303 transitions. [2021-07-09 18:43:38,480 INFO L78 Accepts]: Start accepts. Automaton has 50703 states and 196303 transitions. Word has length 28 [2021-07-09 18:43:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:38,480 INFO L482 AbstractCegarLoop]: Abstraction has 50703 states and 196303 transitions. [2021-07-09 18:43:38,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-07-09 18:43:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 50703 states and 196303 transitions. [2021-07-09 18:43:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:38,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:38,587 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:38,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:38,787 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-07-09 18:43:38,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:38,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929032418] [2021-07-09 18:43:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:38,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:38,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929032418] [2021-07-09 18:43:38,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929032418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:38,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049038655] [2021-07-09 18:43:38,829 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 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 [2021-07-09 18:43:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:38,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049038655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:38,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:38,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:43:38,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637314389] [2021-07-09 18:43:38,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:38,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:38,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:38,955 INFO L87 Difference]: Start difference. First operand 50703 states and 196303 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-07-09 18:43:39,464 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-07-09 18:43:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:40,800 INFO L93 Difference]: Finished difference Result 66428 states and 250518 transitions. [2021-07-09 18:43:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:43:40,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-07-09 18:43:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:41,069 INFO L225 Difference]: With dead ends: 66428 [2021-07-09 18:43:41,070 INFO L226 Difference]: Without dead ends: 66420 [2021-07-09 18:43:41,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 946.2ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:43:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66420 states. [2021-07-09 18:43:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66420 to 50627. [2021-07-09 18:43:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.8728518942835697) internal successors, (196067), 50626 states have internal predecessors, (196067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 196067 transitions. [2021-07-09 18:43:43,115 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 196067 transitions. Word has length 28 [2021-07-09 18:43:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:43,115 INFO L482 AbstractCegarLoop]: Abstraction has 50627 states and 196067 transitions. [2021-07-09 18:43:43,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-07-09 18:43:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 196067 transitions. [2021-07-09 18:43:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:43,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:43,218 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:43,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-07-09 18:43:43,419 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-07-09 18:43:43,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:43,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652074206] [2021-07-09 18:43:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:43,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:43,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652074206] [2021-07-09 18:43:43,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652074206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:43,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598115039] [2021-07-09 18:43:43,459 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 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 [2021-07-09 18:43:43,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:43,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:43,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:43,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:43,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598115039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:43,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:43,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:43,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067836416] [2021-07-09 18:43:43,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:43,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:43,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:43,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:43,573 INFO L87 Difference]: Start difference. First operand 50627 states and 196067 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:43:44,498 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 18:43:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:45,032 INFO L93 Difference]: Finished difference Result 65905 states and 249272 transitions. [2021-07-09 18:43:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:43:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-09 18:43:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:45,267 INFO L225 Difference]: With dead ends: 65905 [2021-07-09 18:43:45,267 INFO L226 Difference]: Without dead ends: 65881 [2021-07-09 18:43:45,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 797.9ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:43:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65881 states. [2021-07-09 18:43:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65881 to 50613. [2021-07-09 18:43:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50613 states, 50612 states have (on average 3.872836481466846) internal successors, (196012), 50612 states have internal predecessors, (196012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50613 states to 50613 states and 196012 transitions. [2021-07-09 18:43:47,282 INFO L78 Accepts]: Start accepts. Automaton has 50613 states and 196012 transitions. Word has length 28 [2021-07-09 18:43:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:47,282 INFO L482 AbstractCegarLoop]: Abstraction has 50613 states and 196012 transitions. [2021-07-09 18:43:47,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:43:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50613 states and 196012 transitions. [2021-07-09 18:43:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:47,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:47,694 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:47,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4075,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:47,918 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:47,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-07-09 18:43:47,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:47,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586688707] [2021-07-09 18:43:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:47,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:47,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586688707] [2021-07-09 18:43:47,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586688707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:47,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047624263] [2021-07-09 18:43:47,959 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 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 [2021-07-09 18:43:47,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:43:47,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:47,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:47,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:48,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047624263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:48,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:48,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:43:48,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378031499] [2021-07-09 18:43:48,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:43:48,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:43:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:43:48,076 INFO L87 Difference]: Start difference. First operand 50613 states and 196012 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-07-09 18:43:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:49,490 INFO L93 Difference]: Finished difference Result 65687 states and 248579 transitions. [2021-07-09 18:43:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:43:49,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-07-09 18:43:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:49,731 INFO L225 Difference]: With dead ends: 65687 [2021-07-09 18:43:49,731 INFO L226 Difference]: Without dead ends: 65647 [2021-07-09 18:43:49,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 569.8ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:43:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65647 states. [2021-07-09 18:43:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65647 to 50962. [2021-07-09 18:43:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 3.874354898844214) internal successors, (197441), 50961 states have internal predecessors, (197441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 197441 transitions. [2021-07-09 18:43:51,741 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 197441 transitions. Word has length 28 [2021-07-09 18:43:51,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:51,741 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 197441 transitions. [2021-07-09 18:43:51,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-07-09 18:43:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 197441 transitions. [2021-07-09 18:43:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:51,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:51,844 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:52,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-09 18:43:52,045 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-07-09 18:43:52,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:52,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534586823] [2021-07-09 18:43:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:52,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:52,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534586823] [2021-07-09 18:43:52,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534586823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:52,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788062510] [2021-07-09 18:43:52,107 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 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 [2021-07-09 18:43:52,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:52,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:52,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:52,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788062510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:52,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:52,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:52,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248215442] [2021-07-09 18:43:52,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:52,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:52,229 INFO L87 Difference]: Start difference. First operand 50962 states and 197441 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-09 18:43:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:54,053 INFO L93 Difference]: Finished difference Result 79769 states and 298419 transitions. [2021-07-09 18:43:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:43:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-07-09 18:43:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:54,362 INFO L225 Difference]: With dead ends: 79769 [2021-07-09 18:43:54,363 INFO L226 Difference]: Without dead ends: 79769 [2021-07-09 18:43:54,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 865.6ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:43:54,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79769 states. [2021-07-09 18:43:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79769 to 52128. [2021-07-09 18:43:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52128 states, 52127 states have (on average 3.8865846873980856) internal successors, (202596), 52127 states have internal predecessors, (202596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52128 states to 52128 states and 202596 transitions. [2021-07-09 18:43:56,487 INFO L78 Accepts]: Start accepts. Automaton has 52128 states and 202596 transitions. Word has length 28 [2021-07-09 18:43:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:56,487 INFO L482 AbstractCegarLoop]: Abstraction has 52128 states and 202596 transitions. [2021-07-09 18:43:56,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-07-09 18:43:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 52128 states and 202596 transitions. [2021-07-09 18:43:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:56,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:56,589 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:56,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-07-09 18:43:56,790 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:56,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-07-09 18:43:56,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:56,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813743085] [2021-07-09 18:43:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:56,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:56,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813743085] [2021-07-09 18:43:56,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813743085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:56,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76935749] [2021-07-09 18:43:56,830 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 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 [2021-07-09 18:43:56,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:43:56,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:56,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:56,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76935749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:56,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:56,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:56,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206322844] [2021-07-09 18:43:56,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:56,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:56,956 INFO L87 Difference]: Start difference. First operand 52128 states and 202596 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:43:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:58,670 INFO L93 Difference]: Finished difference Result 72910 states and 276752 transitions. [2021-07-09 18:43:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:43:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-09 18:43:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:58,978 INFO L225 Difference]: With dead ends: 72910 [2021-07-09 18:43:58,978 INFO L226 Difference]: Without dead ends: 72910 [2021-07-09 18:43:58,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 816.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:43:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72910 states. [2021-07-09 18:44:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72910 to 52158. [2021-07-09 18:44:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52158 states, 52157 states have (on average 3.886400674885442) internal successors, (202703), 52157 states have internal predecessors, (202703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52158 states to 52158 states and 202703 transitions. [2021-07-09 18:44:01,110 INFO L78 Accepts]: Start accepts. Automaton has 52158 states and 202703 transitions. Word has length 28 [2021-07-09 18:44:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:01,110 INFO L482 AbstractCegarLoop]: Abstraction has 52158 states and 202703 transitions. [2021-07-09 18:44:01,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:44:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 52158 states and 202703 transitions. [2021-07-09 18:44:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:01,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:01,208 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:01,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-09 18:44:01,408 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-07-09 18:44:01,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:01,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591172732] [2021-07-09 18:44:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:01,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:01,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591172732] [2021-07-09 18:44:01,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591172732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:01,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139098989] [2021-07-09 18:44:01,460 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 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 [2021-07-09 18:44:01,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:44:01,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:01,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:01,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139098989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:01,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:01,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:44:01,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765268250] [2021-07-09 18:44:01,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:01,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:01,623 INFO L87 Difference]: Start difference. First operand 52158 states and 202703 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-07-09 18:44:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:03,857 INFO L93 Difference]: Finished difference Result 73768 states and 279188 transitions. [2021-07-09 18:44:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:44:03,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-07-09 18:44:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:04,133 INFO L225 Difference]: With dead ends: 73768 [2021-07-09 18:44:04,133 INFO L226 Difference]: Without dead ends: 73768 [2021-07-09 18:44:04,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1237.6ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:44:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73768 states. [2021-07-09 18:44:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73768 to 52422. [2021-07-09 18:44:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52422 states, 52421 states have (on average 3.8831956658591023) internal successors, (203561), 52421 states have internal predecessors, (203561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52422 states to 52422 states and 203561 transitions. [2021-07-09 18:44:06,230 INFO L78 Accepts]: Start accepts. Automaton has 52422 states and 203561 transitions. Word has length 28 [2021-07-09 18:44:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:06,230 INFO L482 AbstractCegarLoop]: Abstraction has 52422 states and 203561 transitions. [2021-07-09 18:44:06,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-07-09 18:44:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 52422 states and 203561 transitions. [2021-07-09 18:44:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:06,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:06,330 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:06,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-07-09 18:44:06,530 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:06,530 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-07-09 18:44:06,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:06,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094831783] [2021-07-09 18:44:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:06,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:06,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094831783] [2021-07-09 18:44:06,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094831783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:06,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741002087] [2021-07-09 18:44:06,570 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 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 [2021-07-09 18:44:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:06,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:06,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741002087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:06,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:06,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:44:06,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916691753] [2021-07-09 18:44:06,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:06,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:06,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:06,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:06,952 INFO L87 Difference]: Start difference. First operand 52422 states and 203561 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-07-09 18:44:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:08,715 INFO L93 Difference]: Finished difference Result 72980 states and 276953 transitions. [2021-07-09 18:44:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:44:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-07-09 18:44:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:09,062 INFO L225 Difference]: With dead ends: 72980 [2021-07-09 18:44:09,062 INFO L226 Difference]: Without dead ends: 72976 [2021-07-09 18:44:09,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1001.6ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:44:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72976 states. [2021-07-09 18:44:10,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72976 to 52058. [2021-07-09 18:44:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52058 states, 52057 states have (on average 3.8866050675221393) internal successors, (202325), 52057 states have internal predecessors, (202325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52058 states to 52058 states and 202325 transitions. [2021-07-09 18:44:11,192 INFO L78 Accepts]: Start accepts. Automaton has 52058 states and 202325 transitions. Word has length 28 [2021-07-09 18:44:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:11,192 INFO L482 AbstractCegarLoop]: Abstraction has 52058 states and 202325 transitions. [2021-07-09 18:44:11,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-07-09 18:44:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 52058 states and 202325 transitions. [2021-07-09 18:44:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:11,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:11,292 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:11,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-07-09 18:44:11,492 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-07-09 18:44:11,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:11,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273608575] [2021-07-09 18:44:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:11,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:11,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273608575] [2021-07-09 18:44:11,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273608575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:11,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25926783] [2021-07-09 18:44:11,533 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 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 [2021-07-09 18:44:11,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:11,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:11,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25926783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:11,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:11,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:44:11,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58085300] [2021-07-09 18:44:11,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:44:11,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:11,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:44:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:44:11,912 INFO L87 Difference]: Start difference. First operand 52058 states and 202325 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:44:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:13,197 INFO L93 Difference]: Finished difference Result 66943 states and 255942 transitions. [2021-07-09 18:44:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:44:13,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-09 18:44:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:13,481 INFO L225 Difference]: With dead ends: 66943 [2021-07-09 18:44:13,481 INFO L226 Difference]: Without dead ends: 66943 [2021-07-09 18:44:13,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 750.6ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:44:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66943 states. [2021-07-09 18:44:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66943 to 52074. [2021-07-09 18:44:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52074 states, 52073 states have (on average 3.8882530294010333) internal successors, (202473), 52073 states have internal predecessors, (202473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52074 states to 52074 states and 202473 transitions. [2021-07-09 18:44:15,516 INFO L78 Accepts]: Start accepts. Automaton has 52074 states and 202473 transitions. Word has length 28 [2021-07-09 18:44:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:15,516 INFO L482 AbstractCegarLoop]: Abstraction has 52074 states and 202473 transitions. [2021-07-09 18:44:15,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:44:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 52074 states and 202473 transitions. [2021-07-09 18:44:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:15,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:15,626 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:15,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:15,826 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:15,827 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-07-09 18:44:15,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:15,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437688445] [2021-07-09 18:44:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:15,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:15,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437688445] [2021-07-09 18:44:15,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437688445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:15,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383337980] [2021-07-09 18:44:15,867 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 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 [2021-07-09 18:44:15,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:44:15,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383337980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:15,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:15,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:44:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743104865] [2021-07-09 18:44:15,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:44:15,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:15,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:44:15,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:44:15,985 INFO L87 Difference]: Start difference. First operand 52074 states and 202473 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:44:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:17,143 INFO L93 Difference]: Finished difference Result 66257 states and 254067 transitions. [2021-07-09 18:44:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:44:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-09 18:44:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:17,398 INFO L225 Difference]: With dead ends: 66257 [2021-07-09 18:44:17,398 INFO L226 Difference]: Without dead ends: 66245 [2021-07-09 18:44:17,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:44:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66245 states. [2021-07-09 18:44:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66245 to 52008. [2021-07-09 18:44:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52008 states, 52007 states have (on average 3.889284134828004) internal successors, (202270), 52007 states have internal predecessors, (202270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52008 states to 52008 states and 202270 transitions. [2021-07-09 18:44:19,462 INFO L78 Accepts]: Start accepts. Automaton has 52008 states and 202270 transitions. Word has length 28 [2021-07-09 18:44:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:19,462 INFO L482 AbstractCegarLoop]: Abstraction has 52008 states and 202270 transitions. [2021-07-09 18:44:19,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:44:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 52008 states and 202270 transitions. [2021-07-09 18:44:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:19,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:19,562 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:19,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-07-09 18:44:19,762 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:19,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-07-09 18:44:19,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:19,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374540170] [2021-07-09 18:44:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:19,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:19,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374540170] [2021-07-09 18:44:19,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374540170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:19,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555769731] [2021-07-09 18:44:19,806 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 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 [2021-07-09 18:44:19,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:19,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:19,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:19,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555769731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:19,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:19,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:44:19,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257561563] [2021-07-09 18:44:19,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:44:19,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:19,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:44:19,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:44:19,927 INFO L87 Difference]: Start difference. First operand 52008 states and 202270 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:44:20,370 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-09 18:44:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:20,972 INFO L93 Difference]: Finished difference Result 56548 states and 217322 transitions. [2021-07-09 18:44:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:44:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-09 18:44:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:21,179 INFO L225 Difference]: With dead ends: 56548 [2021-07-09 18:44:21,179 INFO L226 Difference]: Without dead ends: 56548 [2021-07-09 18:44:21,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 573.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56548 states. [2021-07-09 18:44:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56548 to 52216. [2021-07-09 18:44:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52216 states, 52215 states have (on average 3.8870439528871015) internal successors, (202962), 52215 states have internal predecessors, (202962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52216 states to 52216 states and 202962 transitions. [2021-07-09 18:44:23,031 INFO L78 Accepts]: Start accepts. Automaton has 52216 states and 202962 transitions. Word has length 28 [2021-07-09 18:44:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:23,031 INFO L482 AbstractCegarLoop]: Abstraction has 52216 states and 202962 transitions. [2021-07-09 18:44:23,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-09 18:44:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 52216 states and 202962 transitions. [2021-07-09 18:44:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:23,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:23,133 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:23,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4083,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:23,334 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-07-09 18:44:23,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:23,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267231696] [2021-07-09 18:44:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:23,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:23,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267231696] [2021-07-09 18:44:23,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267231696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:23,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932139754] [2021-07-09 18:44:23,371 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 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 [2021-07-09 18:44:23,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:44:23,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:23,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932139754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:23,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:23,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:44:23,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45614705] [2021-07-09 18:44:23,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:44:23,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:23,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:44:23,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:44:23,482 INFO L87 Difference]: Start difference. First operand 52216 states and 202962 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:44:23,954 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 18:44:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:24,461 INFO L93 Difference]: Finished difference Result 56395 states and 216924 transitions. [2021-07-09 18:44:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:44:24,461 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-09 18:44:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:24,672 INFO L225 Difference]: With dead ends: 56395 [2021-07-09 18:44:24,672 INFO L226 Difference]: Without dead ends: 56391 [2021-07-09 18:44:24,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:44:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56391 states. [2021-07-09 18:44:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56391 to 52156. [2021-07-09 18:44:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52156 states, 52155 states have (on average 3.887834339948231) internal successors, (202770), 52155 states have internal predecessors, (202770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52156 states to 52156 states and 202770 transitions. [2021-07-09 18:44:26,556 INFO L78 Accepts]: Start accepts. Automaton has 52156 states and 202770 transitions. Word has length 28 [2021-07-09 18:44:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:26,556 INFO L482 AbstractCegarLoop]: Abstraction has 52156 states and 202770 transitions. [2021-07-09 18:44:26,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-07-09 18:44:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 52156 states and 202770 transitions. [2021-07-09 18:44:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:26,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:26,658 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:26,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-07-09 18:44:26,858 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 80 times [2021-07-09 18:44:26,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:26,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523428480] [2021-07-09 18:44:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:26,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:26,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523428480] [2021-07-09 18:44:26,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523428480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:26,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930053668] [2021-07-09 18:44:26,899 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 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 [2021-07-09 18:44:26,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:26,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:26,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:26,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:26,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930053668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:26,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:26,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 18:44:26,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436561326] [2021-07-09 18:44:26,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:44:26,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:44:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:44:26,978 INFO L87 Difference]: Start difference. First operand 52156 states and 202770 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-09 18:44:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:27,913 INFO L93 Difference]: Finished difference Result 56442 states and 217026 transitions. [2021-07-09 18:44:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:44:27,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-07-09 18:44:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:28,131 INFO L225 Difference]: With dead ends: 56442 [2021-07-09 18:44:28,131 INFO L226 Difference]: Without dead ends: 56442 [2021-07-09 18:44:28,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:44:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56442 states. [2021-07-09 18:44:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56442 to 52260. [2021-07-09 18:44:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52260 states, 52259 states have (on average 3.88629709715073) internal successors, (203094), 52259 states have internal predecessors, (203094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52260 states to 52260 states and 203094 transitions. [2021-07-09 18:44:30,063 INFO L78 Accepts]: Start accepts. Automaton has 52260 states and 203094 transitions. Word has length 28 [2021-07-09 18:44:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:30,063 INFO L482 AbstractCegarLoop]: Abstraction has 52260 states and 203094 transitions. [2021-07-09 18:44:30,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-09 18:44:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 52260 states and 203094 transitions. [2021-07-09 18:44:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:30,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:30,158 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:30,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:30,361 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 81 times [2021-07-09 18:44:30,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:30,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638363589] [2021-07-09 18:44:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:30,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:30,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638363589] [2021-07-09 18:44:30,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638363589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:30,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734900945] [2021-07-09 18:44:30,396 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 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 [2021-07-09 18:44:30,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:44:30,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:30,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:30,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:30,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734900945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:30,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:30,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:44:30,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900818931] [2021-07-09 18:44:30,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:44:30,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:30,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:44:30,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:44:30,471 INFO L87 Difference]: Start difference. First operand 52260 states and 203094 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-07-09 18:44:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:31,294 INFO L93 Difference]: Finished difference Result 56568 states and 217524 transitions. [2021-07-09 18:44:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:44:31,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-07-09 18:44:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:31,523 INFO L225 Difference]: With dead ends: 56568 [2021-07-09 18:44:31,524 INFO L226 Difference]: Without dead ends: 56556 [2021-07-09 18:44:31,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:44:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56556 states. [2021-07-09 18:44:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56556 to 52394. Received shutdown request... [2021-07-09 18:44:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8846601645257954) internal successors, (203529), 52393 states have internal predecessors, (203529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:33,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-07-09 18:44:33,202 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:44:33,204 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:44:33,207 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:44:33,207 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:44:33 BasicIcfg [2021-07-09 18:44:33,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:44:33,208 INFO L168 Benchmark]: Toolchain (without parser) took 751285.22 ms. Allocated memory was 191.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 172.0 MB in the beginning and 5.4 GB in the end (delta: -5.2 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. [2021-07-09 18:44:33,208 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 191.9 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:44:33,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.53 ms. Allocated memory is still 191.9 MB. Free memory was 171.9 MB in the beginning and 170.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:44:33,208 INFO L168 Benchmark]: Boogie Preprocessor took 15.83 ms. Allocated memory is still 191.9 MB. Free memory was 170.5 MB in the beginning and 169.6 MB in the end (delta: 980.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:44:33,208 INFO L168 Benchmark]: RCFGBuilder took 323.28 ms. Allocated memory is still 191.9 MB. Free memory was 169.5 MB in the beginning and 156.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:44:33,208 INFO L168 Benchmark]: TraceAbstraction took 750911.06 ms. Allocated memory was 191.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 155.9 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. [2021-07-09 18:44:33,209 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 0.14 ms. Allocated memory is still 191.9 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 30.53 ms. Allocated memory is still 191.9 MB. Free memory was 171.9 MB in the beginning and 170.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.83 ms. Allocated memory is still 191.9 MB. Free memory was 170.5 MB in the beginning and 169.6 MB in the end (delta: 980.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 323.28 ms. Allocated memory is still 191.9 MB. Free memory was 169.5 MB in the beginning and 156.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 750911.06 ms. Allocated memory was 191.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 155.9 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 750788.1ms, OverallIterations: 251, TraceHistogramMax: 3, EmptinessCheckTime: 7121.0ms, AutomataDifference: 387175.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11121 SDtfs, 72084 SDslu, 84587 SDs, 0 SdLazy, 135655 SolverSat, 13092 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 77064.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16173 GetRequests, 5278 SyntacticMatches, 232 SemanticMatches, 10663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181524 ImplicationChecksByTransitivity, 333685.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52422occurred in iteration=244, InterpolantAutomatonStates: 9484, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 103551.6ms AutomataMinimizationTime, 251 MinimizatonAttempts, 1274825 StatesRemovedByMinimization, 250 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 812.2ms SsaConstructionTime, 2955.3ms SatisfiabilityAnalysisTime, 193425.6ms InterpolantComputationTime, 13290 NumberOfCodeBlocks, 13290 NumberOfCodeBlocksAsserted, 868 NumberOfCheckSat, 12791 ConstructedInterpolants, 147 QuantifiedInterpolants, 240258 SizeOfPredicates, 1103 NumberOfNonLiveVariables, 17284 ConjunctsInSsa, 3701 ConjunctsInUnsatCore, 499 InterpolantComputations, 3 PerfectInterpolantSequences, 978/4178 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