/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/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:41:36,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:41:36,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:41:36,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:41:36,730 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 [2021-07-13 20:41:36,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:41:36,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:41:36,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:41:36,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:41:36,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:41:36,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:41:36,760 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:41:36,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:41:36,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:41:36,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:41:36,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:41:36,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:41:36,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:41:36,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:41:36,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:41:36,762 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:41:36,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:41:36,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:41:36,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:41:36,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:41:36,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:41:36,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:41:36,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:41:36,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:41:36,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:41:36,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:41:36,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:41:36,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:41:36,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:41:36,793 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:41:36,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:41:36,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:41:37,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:41:37,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:41:37,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:41:37,050 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:41:37,052 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:41:37,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-07-13 20:41:37,053 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-07-13 20:41:37,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:41:37,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:41:37,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:41:37,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:41:37,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:41:37,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:41:37,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:41:37,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:41:37,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:41:37,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/1) ... [2021-07-13 20:41:37,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:41:37,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:41:37,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:41:37,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:41:37,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (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 [2021-07-13 20:41:37,161 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:41:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:41:37,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:41:37,162 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:41:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:41:37,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:41:37,162 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:41:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:41:37,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:41:37,163 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:41:37,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:41:37,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:41:37,163 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:41:37,380 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:41:37,380 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:41:37,382 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:41:37 BoogieIcfgContainer [2021-07-13 20:41:37,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:41:37,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:41:37,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:41:37,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:41:37,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:41:37" (1/2) ... [2021-07-13 20:41:37,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1eb0cf and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:41:37, skipping insertion in model container [2021-07-13 20:41:37,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:41:37" (2/2) ... [2021-07-13 20:41:37,386 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-07-13 20:41:37,389 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:41:37,390 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:41:37,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:41:37,390 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:41:37,446 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:41:37,460 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:41:37,483 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:41:37,484 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:41:37,484 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:41:37,484 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:41:37,484 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:41:37,484 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:41:37,484 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:41:37,484 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:41:37,494 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-07-13 20:41:37,531 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:41:37,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:37,550 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] [2021-07-13 20:41:37,551 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1255036480, now seen corresponding path program 1 times [2021-07-13 20:41:37,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:37,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631395567] [2021-07-13 20:41:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:37,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:37,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631395567] [2021-07-13 20:41:37,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631395567] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:37,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:37,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 20:41:37,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717075805] [2021-07-13 20:41:37,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:41:37,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:41:37,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:37,870 INFO L87 Difference]: Start difference. First operand has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 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 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:37,944 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-07-13 20:41:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:41:37,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:41:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:37,953 INFO L225 Difference]: With dead ends: 349 [2021-07-13 20:41:37,954 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 20:41:37,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 20:41:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-07-13 20:41:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.482876712328767) internal successors, (725), 292 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-07-13 20:41:37,993 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-07-13 20:41:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:37,993 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-07-13 20:41:37,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-07-13 20:41:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:41:37,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:37,995 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] [2021-07-13 20:41:37,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:41:37,995 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1026037738, now seen corresponding path program 2 times [2021-07-13 20:41:37,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:37,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225015418] [2021-07-13 20:41:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:38,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:38,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225015418] [2021-07-13 20:41:38,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225015418] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:38,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:38,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 20:41:38,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205516723] [2021-07-13 20:41:38,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:41:38,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:41:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:38,083 INFO L87 Difference]: Start difference. First operand 293 states and 725 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,190 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-07-13 20:41:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:41:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:41:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:38,194 INFO L225 Difference]: With dead ends: 333 [2021-07-13 20:41:38,194 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 20:41:38,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 20:41:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-07-13 20:41:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3926940639269407) internal successors, (524), 219 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-07-13 20:41:38,206 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-07-13 20:41:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:38,206 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-07-13 20:41:38,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-07-13 20:41:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:41:38,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:38,207 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] [2021-07-13 20:41:38,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:41:38,208 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:38,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1622143654, now seen corresponding path program 3 times [2021-07-13 20:41:38,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:38,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525093779] [2021-07-13 20:41:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:38,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:38,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525093779] [2021-07-13 20:41:38,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525093779] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:38,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:38,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 20:41:38,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237391558] [2021-07-13 20:41:38,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:41:38,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:38,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:41:38,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:38,298 INFO L87 Difference]: Start difference. First operand 220 states and 524 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,352 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-07-13 20:41:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:41:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:41:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:38,355 INFO L225 Difference]: With dead ends: 320 [2021-07-13 20:41:38,357 INFO L226 Difference]: Without dead ends: 280 [2021-07-13 20:41:38,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-13 20:41:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-07-13 20:41:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.3824884792626726) internal successors, (517), 217 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-07-13 20:41:38,376 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-07-13 20:41:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:38,376 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-07-13 20:41:38,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-07-13 20:41:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:41:38,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:38,377 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] [2021-07-13 20:41:38,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:41:38,377 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:38,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:38,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1222496346, now seen corresponding path program 4 times [2021-07-13 20:41:38,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:38,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169018363] [2021-07-13 20:41:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:38,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169018363] [2021-07-13 20:41:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169018363] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:38,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:38,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 20:41:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059977629] [2021-07-13 20:41:38,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:41:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:41:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:38,480 INFO L87 Difference]: Start difference. First operand 218 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,536 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-07-13 20:41:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:41:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:41:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:38,538 INFO L225 Difference]: With dead ends: 327 [2021-07-13 20:41:38,538 INFO L226 Difference]: Without dead ends: 290 [2021-07-13 20:41:38,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-13 20:41:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-07-13 20:41:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3866666666666667) internal successors, (537), 225 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-07-13 20:41:38,545 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-07-13 20:41:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:38,545 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-07-13 20:41:38,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-07-13 20:41:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:41:38,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:38,546 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] [2021-07-13 20:41:38,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:41:38,547 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash -290768546, now seen corresponding path program 5 times [2021-07-13 20:41:38,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:38,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626181281] [2021-07-13 20:41:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:38,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:38,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626181281] [2021-07-13 20:41:38,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626181281] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:38,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:38,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 20:41:38,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148593185] [2021-07-13 20:41:38,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:41:38,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:38,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:41:38,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:38,669 INFO L87 Difference]: Start difference. First operand 226 states and 537 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,733 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-07-13 20:41:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:41:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:41:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:38,735 INFO L225 Difference]: With dead ends: 333 [2021-07-13 20:41:38,735 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 20:41:38,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 20:41:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-07-13 20:41:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4356846473029043) internal successors, (587), 241 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-07-13 20:41:38,744 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-07-13 20:41:38,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:38,744 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-07-13 20:41:38,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-07-13 20:41:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:41:38,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:38,745 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] [2021-07-13 20:41:38,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:41:38,745 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1531612134, now seen corresponding path program 6 times [2021-07-13 20:41:38,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:38,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530040938] [2021-07-13 20:41:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:38,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:38,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530040938] [2021-07-13 20:41:38,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530040938] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:38,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:38,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 20:41:38,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307484299] [2021-07-13 20:41:38,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:41:38,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:41:38,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:38,855 INFO L87 Difference]: Start difference. First operand 242 states and 587 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,928 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-07-13 20:41:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:41:38,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:41:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:38,930 INFO L225 Difference]: With dead ends: 337 [2021-07-13 20:41:38,930 INFO L226 Difference]: Without dead ends: 297 [2021-07-13 20:41:38,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-13 20:41:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-07-13 20:41:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.3856502242152464) internal successors, (532), 223 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-07-13 20:41:38,938 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-07-13 20:41:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:38,941 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-07-13 20:41:38,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-07-13 20:41:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:38,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:38,945 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, 1] [2021-07-13 20:41:38,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:41:38,946 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1542585456, now seen corresponding path program 1 times [2021-07-13 20:41:38,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:38,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448581920] [2021-07-13 20:41:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:38,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:38,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448581920] [2021-07-13 20:41:38,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448581920] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:38,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:38,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:38,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436324966] [2021-07-13 20:41:38,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:38,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:38,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:38,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:38,970 INFO L87 Difference]: Start difference. First operand 224 states and 532 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:39,009 INFO L93 Difference]: Finished difference Result 316 states and 745 transitions. [2021-07-13 20:41:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:41:39,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,011 INFO L225 Difference]: With dead ends: 316 [2021-07-13 20:41:39,011 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 20:41:39,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 20:41:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 213. [2021-07-13 20:41:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.4245283018867925) internal successors, (514), 212 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-07-13 20:41:39,017 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-07-13 20:41:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,017 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-07-13 20:41:39,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-07-13 20:41:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:39,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,018 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, 1] [2021-07-13 20:41:39,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 20:41:39,018 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash -263047510, now seen corresponding path program 1 times [2021-07-13 20:41:39,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466268550] [2021-07-13 20:41:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466268550] [2021-07-13 20:41:39,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466268550] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:39,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:39,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:39,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755959069] [2021-07-13 20:41:39,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:39,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:39,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:39,047 INFO L87 Difference]: Start difference. First operand 213 states and 514 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:39,100 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-07-13 20:41:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:41:39,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:39,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,103 INFO L225 Difference]: With dead ends: 361 [2021-07-13 20:41:39,103 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 20:41:39,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 20:41:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-07-13 20:41:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.400943396226415) internal successors, (509), 212 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-07-13 20:41:39,108 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-07-13 20:41:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,108 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-07-13 20:41:39,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-07-13 20:41:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:39,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,110 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, 1] [2021-07-13 20:41:39,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 20:41:39,110 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1947593430, now seen corresponding path program 2 times [2021-07-13 20:41:39,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107495901] [2021-07-13 20:41:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107495901] [2021-07-13 20:41:39,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107495901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552853363] [2021-07-13 20:41:39,145 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 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 [2021-07-13 20:41:39,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:39,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:41:39,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552853363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:39,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 20:41:39,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293938554] [2021-07-13 20:41:39,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:41:39,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:41:39,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:41:39,326 INFO L87 Difference]: Start difference. First operand 213 states and 509 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-07-13 20:41:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:39,390 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-07-13 20:41:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:41:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 25 [2021-07-13 20:41:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,394 INFO L225 Difference]: With dead ends: 495 [2021-07-13 20:41:39,394 INFO L226 Difference]: Without dead ends: 495 [2021-07-13 20:41:39,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-13 20:41:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-07-13 20:41:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4318181818181817) internal successors, (535), 220 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-07-13 20:41:39,403 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-07-13 20:41:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,403 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-07-13 20:41:39,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-07-13 20:41:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-07-13 20:41:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:39,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,405 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, 1] [2021-07-13 20:41:39,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-07-13 20:41:39,613 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2136676820, now seen corresponding path program 2 times [2021-07-13 20:41:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550011882] [2021-07-13 20:41:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550011882] [2021-07-13 20:41:39,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550011882] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:39,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:39,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:39,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533529646] [2021-07-13 20:41:39,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:39,637 INFO L87 Difference]: Start difference. First operand 221 states and 535 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:39,677 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-07-13 20:41:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:41:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,678 INFO L225 Difference]: With dead ends: 341 [2021-07-13 20:41:39,679 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 20:41:39,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 20:41:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-07-13 20:41:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4385245901639343) internal successors, (595), 244 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-07-13 20:41:39,684 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-07-13 20:41:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,684 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-07-13 20:41:39,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-07-13 20:41:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:39,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,685 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, 1] [2021-07-13 20:41:39,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 20:41:39,685 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1429538658, now seen corresponding path program 3 times [2021-07-13 20:41:39,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37519098] [2021-07-13 20:41:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37519098] [2021-07-13 20:41:39,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37519098] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:39,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:39,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:39,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238321981] [2021-07-13 20:41:39,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:39,714 INFO L87 Difference]: Start difference. First operand 245 states and 595 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:39,758 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-07-13 20:41:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:41:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,759 INFO L225 Difference]: With dead ends: 284 [2021-07-13 20:41:39,759 INFO L226 Difference]: Without dead ends: 284 [2021-07-13 20:41:39,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-13 20:41:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-07-13 20:41:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.422727272727273) internal successors, (533), 220 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-07-13 20:41:39,764 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-07-13 20:41:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,764 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-07-13 20:41:39,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-07-13 20:41:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:39,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,764 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, 1] [2021-07-13 20:41:39,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-13 20:41:39,765 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1806509812, now seen corresponding path program 3 times [2021-07-13 20:41:39,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248505440] [2021-07-13 20:41:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248505440] [2021-07-13 20:41:39,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248505440] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:39,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:39,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:39,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280393169] [2021-07-13 20:41:39,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:39,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:39,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:39,785 INFO L87 Difference]: Start difference. First operand 221 states and 533 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:39,838 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-07-13 20:41:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:41:39,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,840 INFO L225 Difference]: With dead ends: 394 [2021-07-13 20:41:39,840 INFO L226 Difference]: Without dead ends: 387 [2021-07-13 20:41:39,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:41:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-13 20:41:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-07-13 20:41:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4136363636363636) internal successors, (531), 220 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-07-13 20:41:39,845 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-07-13 20:41:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,845 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-07-13 20:41:39,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-07-13 20:41:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:39,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,845 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, 1] [2021-07-13 20:41:39,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 20:41:39,846 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1574415630, now seen corresponding path program 4 times [2021-07-13 20:41:39,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:39,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715170645] [2021-07-13 20:41:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:39,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715170645] [2021-07-13 20:41:39,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715170645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024203324] [2021-07-13 20:41:39,864 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 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 [2021-07-13 20:41:39,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:39,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:41:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:39,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024203324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:39,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:39,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 20:41:39,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753920214] [2021-07-13 20:41:39,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:41:39,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:39,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:41:39,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:41:39,960 INFO L87 Difference]: Start difference. First operand 221 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,006 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-07-13 20:41:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:41:40,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,008 INFO L225 Difference]: With dead ends: 340 [2021-07-13 20:41:40,008 INFO L226 Difference]: Without dead ends: 340 [2021-07-13 20:41:40,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-13 20:41:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-07-13 20:41:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4278846153846154) internal successors, (505), 208 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-07-13 20:41:40,012 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-07-13 20:41:40,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,012 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-07-13 20:41:40,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-07-13 20:41:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:40,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,013 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, 1] [2021-07-13 20:41:40,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 20:41:40,229 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1219695586, now seen corresponding path program 4 times [2021-07-13 20:41:40,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61304601] [2021-07-13 20:41:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61304601] [2021-07-13 20:41:40,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61304601] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:40,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:40,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734057377] [2021-07-13 20:41:40,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:40,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:40,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:40,249 INFO L87 Difference]: Start difference. First operand 209 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,293 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-07-13 20:41:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:41:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,295 INFO L225 Difference]: With dead ends: 348 [2021-07-13 20:41:40,295 INFO L226 Difference]: Without dead ends: 330 [2021-07-13 20:41:40,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-13 20:41:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-07-13 20:41:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-07-13 20:41:40,299 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-07-13 20:41:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,299 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-07-13 20:41:40,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-07-13 20:41:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:40,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,300 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, 1] [2021-07-13 20:41:40,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 20:41:40,300 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash 756519376, now seen corresponding path program 5 times [2021-07-13 20:41:40,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958172586] [2021-07-13 20:41:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958172586] [2021-07-13 20:41:40,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958172586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168334531] [2021-07-13 20:41:40,323 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 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 [2021-07-13 20:41:40,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:40,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:41:40,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168334531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:40,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 20:41:40,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940327960] [2021-07-13 20:41:40,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:41:40,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:40,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:41:40,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:41:40,412 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-07-13 20:41:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,470 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-07-13 20:41:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:41:40,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 25 [2021-07-13 20:41:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,472 INFO L225 Difference]: With dead ends: 379 [2021-07-13 20:41:40,472 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 20:41:40,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 20:41:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-07-13 20:41:40,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-07-13 20:41:40,478 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-07-13 20:41:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,478 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-07-13 20:41:40,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-07-13 20:41:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-07-13 20:41:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:40,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,479 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, 1] [2021-07-13 20:41:40,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:41:40,689 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 545822330, now seen corresponding path program 5 times [2021-07-13 20:41:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553550606] [2021-07-13 20:41:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553550606] [2021-07-13 20:41:40,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553550606] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:40,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:40,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:40,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962302908] [2021-07-13 20:41:40,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:40,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:40,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:40,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:40,704 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,753 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-07-13 20:41:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:41:40,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,755 INFO L225 Difference]: With dead ends: 381 [2021-07-13 20:41:40,755 INFO L226 Difference]: Without dead ends: 375 [2021-07-13 20:41:40,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:41:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-13 20:41:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-07-13 20:41:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.418103448275862) internal successors, (561), 232 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-07-13 20:41:40,761 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-07-13 20:41:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,761 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-07-13 20:41:40,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,761 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-07-13 20:41:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:40,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,761 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, 1] [2021-07-13 20:41:40,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-13 20:41:40,762 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1274574148, now seen corresponding path program 6 times [2021-07-13 20:41:40,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787137324] [2021-07-13 20:41:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787137324] [2021-07-13 20:41:40,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787137324] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:40,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:40,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:40,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24430062] [2021-07-13 20:41:40,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:40,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:40,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:40,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:40,781 INFO L87 Difference]: Start difference. First operand 233 states and 561 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,822 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-07-13 20:41:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:41:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,824 INFO L225 Difference]: With dead ends: 311 [2021-07-13 20:41:40,824 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 20:41:40,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:41:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 20:41:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-07-13 20:41:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3990384615384617) internal successors, (499), 208 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-07-13 20:41:40,828 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-07-13 20:41:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,828 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-07-13 20:41:40,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-07-13 20:41:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:41:40,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,829 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, 1] [2021-07-13 20:41:40,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-13 20:41:40,829 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash 897602994, now seen corresponding path program 6 times [2021-07-13 20:41:40,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785973298] [2021-07-13 20:41:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785973298] [2021-07-13 20:41:40,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785973298] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:41:40,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:41:40,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:41:40,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926711096] [2021-07-13 20:41:40,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:41:40,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:40,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:41:40,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:41:40,847 INFO L87 Difference]: Start difference. First operand 209 states and 499 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,885 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-07-13 20:41:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:41:40,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:41:40,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,886 INFO L225 Difference]: With dead ends: 256 [2021-07-13 20:41:40,886 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 20:41:40,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:41:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 20:41:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-07-13 20:41:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3883495145631066) internal successors, (492), 206 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-07-13 20:41:40,890 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-07-13 20:41:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:40,890 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-07-13 20:41:40,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-07-13 20:41:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:40,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:40,891 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, 1, 1, 1, 1] [2021-07-13 20:41:40,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-07-13 20:41:40,891 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2142631590, now seen corresponding path program 1 times [2021-07-13 20:41:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158602676] [2021-07-13 20:41:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:40,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158602676] [2021-07-13 20:41:40,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158602676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911985491] [2021-07-13 20:41:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:41:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:41,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911985491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:41,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 20:41:41,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296259674] [2021-07-13 20:41:41,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:41,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:41,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:41,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:41,085 INFO L87 Difference]: Start difference. First operand 207 states and 492 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:41:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:41,202 INFO L93 Difference]: Finished difference Result 469 states and 1199 transitions. [2021-07-13 20:41:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 28 [2021-07-13 20:41:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:41,204 INFO L225 Difference]: With dead ends: 469 [2021-07-13 20:41:41,204 INFO L226 Difference]: Without dead ends: 432 [2021-07-13 20:41:41,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-13 20:41:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 310. [2021-07-13 20:41:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.5242718446601944) internal successors, (780), 309 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 780 transitions. [2021-07-13 20:41:41,210 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 780 transitions. Word has length 28 [2021-07-13 20:41:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:41,211 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 780 transitions. [2021-07-13 20:41:41,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:41:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 780 transitions. [2021-07-13 20:41:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:41,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:41,211 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, 1, 1, 1, 1] [2021-07-13 20:41:41,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:41,417 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2023548578, now seen corresponding path program 2 times [2021-07-13 20:41:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:41,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187620219] [2021-07-13 20:41:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:41,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187620219] [2021-07-13 20:41:41,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187620219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051133994] [2021-07-13 20:41:41,496 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 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 [2021-07-13 20:41:41,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:41,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:41,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:41,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051133994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:41,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 20:41:41,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518421851] [2021-07-13 20:41:41,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:41,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:41,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:41,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:41,604 INFO L87 Difference]: Start difference. First operand 310 states and 780 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:41:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:41,717 INFO L93 Difference]: Finished difference Result 477 states and 1212 transitions. [2021-07-13 20:41:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 28 [2021-07-13 20:41:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:41,719 INFO L225 Difference]: With dead ends: 477 [2021-07-13 20:41:41,720 INFO L226 Difference]: Without dead ends: 435 [2021-07-13 20:41:41,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-13 20:41:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 309. [2021-07-13 20:41:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.50974025974026) internal successors, (773), 308 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 773 transitions. [2021-07-13 20:41:41,726 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 773 transitions. Word has length 28 [2021-07-13 20:41:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:41,726 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 773 transitions. [2021-07-13 20:41:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:41:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 773 transitions. [2021-07-13 20:41:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:41,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:41,727 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, 1, 1, 1, 1] [2021-07-13 20:41:41,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:41,941 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2127131136, now seen corresponding path program 3 times [2021-07-13 20:41:41,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:41,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022962079] [2021-07-13 20:41:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:42,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:42,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022962079] [2021-07-13 20:41:42,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022962079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:42,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687487538] [2021-07-13 20:41:42,026 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 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 [2021-07-13 20:41:42,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:41:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:42,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:42,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687487538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:42,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:42,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:41:42,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491723688] [2021-07-13 20:41:42,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:42,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:42,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:42,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:42,150 INFO L87 Difference]: Start difference. First operand 309 states and 773 transitions. Second operand has 12 states, 12 states have (on average 3.0) 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) [2021-07-13 20:41:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:42,231 INFO L93 Difference]: Finished difference Result 497 states and 1252 transitions. [2021-07-13 20:41:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:41:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 [2021-07-13 20:41:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:42,233 INFO L225 Difference]: With dead ends: 497 [2021-07-13 20:41:42,233 INFO L226 Difference]: Without dead ends: 459 [2021-07-13 20:41:42,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:42,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-13 20:41:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 342. [2021-07-13 20:41:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.504398826979472) internal successors, (854), 341 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 854 transitions. [2021-07-13 20:41:42,240 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 854 transitions. Word has length 28 [2021-07-13 20:41:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:42,240 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 854 transitions. [2021-07-13 20:41:42,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) 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) [2021-07-13 20:41:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 854 transitions. [2021-07-13 20:41:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:42,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:42,240 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, 1, 1, 1, 1] [2021-07-13 20:41:42,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:42,461 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash 76882114, now seen corresponding path program 4 times [2021-07-13 20:41:42,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:42,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116575476] [2021-07-13 20:41:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:42,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:42,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116575476] [2021-07-13 20:41:42,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116575476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:42,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529419629] [2021-07-13 20:41:42,543 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 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 [2021-07-13 20:41:42,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:42,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:42,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:42,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529419629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:42,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:42,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 20:41:42,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795551173] [2021-07-13 20:41:42,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:42,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:42,623 INFO L87 Difference]: Start difference. First operand 342 states and 854 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-07-13 20:41:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:42,706 INFO L93 Difference]: Finished difference Result 548 states and 1355 transitions. [2021-07-13 20:41:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 28 [2021-07-13 20:41:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:42,708 INFO L225 Difference]: With dead ends: 548 [2021-07-13 20:41:42,708 INFO L226 Difference]: Without dead ends: 510 [2021-07-13 20:41:42,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-13 20:41:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 349. [2021-07-13 20:41:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4913793103448274) internal successors, (867), 348 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-07-13 20:41:42,714 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-07-13 20:41:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:42,714 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-07-13 20:41:42,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-07-13 20:41:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-07-13 20:41:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:42,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:42,715 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, 1, 1, 1, 1] [2021-07-13 20:41:42,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:42,929 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash 506706334, now seen corresponding path program 5 times [2021-07-13 20:41:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:42,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560183732] [2021-07-13 20:41:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:43,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:43,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560183732] [2021-07-13 20:41:43,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560183732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158765263] [2021-07-13 20:41:43,003 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 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 [2021-07-13 20:41:43,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:43,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158765263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:43,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:41:43,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148758238] [2021-07-13 20:41:43,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:43,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:43,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:43,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:43,128 INFO L87 Difference]: Start difference. First operand 349 states and 867 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-07-13 20:41:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:43,196 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-07-13 20:41:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 [2021-07-13 20:41:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:43,198 INFO L225 Difference]: With dead ends: 530 [2021-07-13 20:41:43,198 INFO L226 Difference]: Without dead ends: 493 [2021-07-13 20:41:43,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-13 20:41:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-07-13 20:41:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.5525114155251143) internal successors, (1118), 438 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-07-13 20:41:43,206 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-07-13 20:41:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:43,206 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-07-13 20:41:43,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-07-13 20:41:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-07-13 20:41:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:43,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:43,207 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, 1, 1, 1, 1] [2021-07-13 20:41:43,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:41:43,413 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1783210398, now seen corresponding path program 6 times [2021-07-13 20:41:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:43,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41421880] [2021-07-13 20:41:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:43,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:43,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41421880] [2021-07-13 20:41:43,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41421880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126530997] [2021-07-13 20:41:43,475 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 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 [2021-07-13 20:41:43,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:43,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:43,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126530997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:43,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-13 20:41:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954689761] [2021-07-13 20:41:43,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:43,579 INFO L87 Difference]: Start difference. First operand 439 states and 1118 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-07-13 20:41:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:43,643 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-07-13 20:41:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-07-13 20:41:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:43,645 INFO L225 Difference]: With dead ends: 526 [2021-07-13 20:41:43,645 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 20:41:43,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 20:41:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-07-13 20:41:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.5490654205607477) internal successors, (1091), 428 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-07-13 20:41:43,652 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-07-13 20:41:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:43,652 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-07-13 20:41:43,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-07-13 20:41:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-07-13 20:41:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:43,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:43,653 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, 1, 1, 1, 1] [2021-07-13 20:41:43,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:43,871 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:43,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:43,871 INFO L82 PathProgramCache]: Analyzing trace with hash -961151642, now seen corresponding path program 7 times [2021-07-13 20:41:43,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:43,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109734647] [2021-07-13 20:41:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:43,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:43,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109734647] [2021-07-13 20:41:43,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109734647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111652277] [2021-07-13 20:41:43,959 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:41:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111652277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:44,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:41:44,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74857372] [2021-07-13 20:41:44,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:44,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:44,083 INFO L87 Difference]: Start difference. First operand 429 states and 1091 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) [2021-07-13 20:41:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:44,162 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-07-13 20:41:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:44,163 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 28 [2021-07-13 20:41:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:44,164 INFO L225 Difference]: With dead ends: 623 [2021-07-13 20:41:44,165 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 20:41:44,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 20:41:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-07-13 20:41:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.598326359832636) internal successors, (1242), 478 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-07-13 20:41:44,176 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-07-13 20:41:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:44,176 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-07-13 20:41:44,177 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) [2021-07-13 20:41:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-07-13 20:41:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:44,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:44,179 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, 1, 1, 1, 1] [2021-07-13 20:41:44,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:44,397 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:44,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1190067302, now seen corresponding path program 8 times [2021-07-13 20:41:44,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:44,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744648340] [2021-07-13 20:41:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:44,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744648340] [2021-07-13 20:41:44,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744648340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832173184] [2021-07-13 20:41:44,502 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 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 [2021-07-13 20:41:44,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:44,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:44,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:44,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832173184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:44,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 20:41:44,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822838107] [2021-07-13 20:41:44,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:44,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:44,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:44,584 INFO L87 Difference]: Start difference. First operand 479 states and 1242 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-07-13 20:41:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:44,659 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-07-13 20:41:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 28 [2021-07-13 20:41:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:44,662 INFO L225 Difference]: With dead ends: 774 [2021-07-13 20:41:44,663 INFO L226 Difference]: Without dead ends: 737 [2021-07-13 20:41:44,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-07-13 20:41:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-07-13 20:41:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.595918367346939) internal successors, (1272), 490 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-07-13 20:41:44,672 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-07-13 20:41:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:44,672 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-07-13 20:41:44,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-07-13 20:41:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-07-13 20:41:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:44,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:44,673 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, 1, 1, 1, 1] [2021-07-13 20:41:44,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:41:44,890 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash -507591454, now seen corresponding path program 9 times [2021-07-13 20:41:44,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:44,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199385422] [2021-07-13 20:41:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:44,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199385422] [2021-07-13 20:41:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199385422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309223139] [2021-07-13 20:41:44,963 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 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 [2021-07-13 20:41:44,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:41:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309223139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:45,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:41:45,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176028762] [2021-07-13 20:41:45,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:45,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:45,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:45,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:45,069 INFO L87 Difference]: Start difference. First operand 491 states and 1272 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) [2021-07-13 20:41:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:45,147 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-07-13 20:41:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:41:45,147 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 28 [2021-07-13 20:41:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:45,149 INFO L225 Difference]: With dead ends: 766 [2021-07-13 20:41:45,149 INFO L226 Difference]: Without dead ends: 729 [2021-07-13 20:41:45,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-07-13 20:41:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-07-13 20:41:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.604330708661417) internal successors, (1323), 508 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-07-13 20:41:45,158 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-07-13 20:41:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:45,158 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-07-13 20:41:45,159 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) [2021-07-13 20:41:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-07-13 20:41:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:45,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:45,159 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, 1, 1, 1, 1] [2021-07-13 20:41:45,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:41:45,376 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1491384154, now seen corresponding path program 10 times [2021-07-13 20:41:45,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:45,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744718598] [2021-07-13 20:41:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:45,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744718598] [2021-07-13 20:41:45,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744718598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729957090] [2021-07-13 20:41:45,463 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 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 [2021-07-13 20:41:45,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:45,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:45,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729957090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:45,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 20:41:45,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745715090] [2021-07-13 20:41:45,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:45,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:45,556 INFO L87 Difference]: Start difference. First operand 509 states and 1323 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-07-13 20:41:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:45,656 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-07-13 20:41:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 28 [2021-07-13 20:41:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:45,660 INFO L225 Difference]: With dead ends: 860 [2021-07-13 20:41:45,660 INFO L226 Difference]: Without dead ends: 823 [2021-07-13 20:41:45,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-07-13 20:41:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-07-13 20:41:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.645051194539249) internal successors, (1550), 586 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-07-13 20:41:45,669 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-07-13 20:41:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:45,669 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-07-13 20:41:45,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-07-13 20:41:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-07-13 20:41:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:45,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:45,670 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, 1, 1, 1, 1] [2021-07-13 20:41:45,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:41:45,885 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1610467166, now seen corresponding path program 11 times [2021-07-13 20:41:45,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:45,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137183019] [2021-07-13 20:41:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:45,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137183019] [2021-07-13 20:41:45,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137183019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051286649] [2021-07-13 20:41:45,961 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 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 [2021-07-13 20:41:45,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:45,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:45,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:45,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:46,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051286649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:46,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:46,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 20:41:46,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77305333] [2021-07-13 20:41:46,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:46,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:46,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:46,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:46,054 INFO L87 Difference]: Start difference. First operand 587 states and 1550 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-07-13 20:41:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:46,195 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-07-13 20:41:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 28 [2021-07-13 20:41:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:46,197 INFO L225 Difference]: With dead ends: 864 [2021-07-13 20:41:46,197 INFO L226 Difference]: Without dead ends: 822 [2021-07-13 20:41:46,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-07-13 20:41:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-07-13 20:41:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.645614035087719) internal successors, (1508), 570 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-07-13 20:41:46,206 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-07-13 20:41:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:46,206 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-07-13 20:41:46,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-07-13 20:41:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-07-13 20:41:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:46,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:46,207 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, 1, 1, 1, 1] [2021-07-13 20:41:46,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:46,413 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1452503728, now seen corresponding path program 12 times [2021-07-13 20:41:46,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:46,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683638896] [2021-07-13 20:41:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:46,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:46,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683638896] [2021-07-13 20:41:46,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683638896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:46,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822691826] [2021-07-13 20:41:46,480 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 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 [2021-07-13 20:41:46,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:41:46,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:46,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:46,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822691826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:46,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:46,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:41:46,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055366878] [2021-07-13 20:41:46,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:46,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:46,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:46,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:46,600 INFO L87 Difference]: Start difference. First operand 571 states and 1508 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) [2021-07-13 20:41:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:46,704 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-07-13 20:41:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:46,704 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 28 [2021-07-13 20:41:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:46,707 INFO L225 Difference]: With dead ends: 752 [2021-07-13 20:41:46,707 INFO L226 Difference]: Without dead ends: 715 [2021-07-13 20:41:46,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:46,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-07-13 20:41:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-07-13 20:41:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.6415770609319) internal successors, (1474), 558 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-07-13 20:41:46,715 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-07-13 20:41:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:46,715 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-07-13 20:41:46,715 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) [2021-07-13 20:41:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-07-13 20:41:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:46,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:46,716 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, 1, 1, 1, 1] [2021-07-13 20:41:46,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:46,929 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:46,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1557867328, now seen corresponding path program 13 times [2021-07-13 20:41:46,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:46,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303717126] [2021-07-13 20:41:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:47,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:47,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303717126] [2021-07-13 20:41:47,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303717126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611114214] [2021-07-13 20:41:47,005 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 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 [2021-07-13 20:41:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:47,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:47,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611114214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:47,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-13 20:41:47,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784921202] [2021-07-13 20:41:47,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:47,115 INFO L87 Difference]: Start difference. First operand 559 states and 1474 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:41:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:47,169 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-07-13 20:41:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 28 [2021-07-13 20:41:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:47,172 INFO L225 Difference]: With dead ends: 718 [2021-07-13 20:41:47,172 INFO L226 Difference]: Without dead ends: 681 [2021-07-13 20:41:47,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-07-13 20:41:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-07-13 20:41:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.676751592356688) internal successors, (1681), 628 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-07-13 20:41:47,180 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-07-13 20:41:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:47,180 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-07-13 20:41:47,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:41:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-07-13 20:41:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:47,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:47,182 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, 1, 1, 1, 1] [2021-07-13 20:41:47,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:47,401 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1676950340, now seen corresponding path program 14 times [2021-07-13 20:41:47,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:47,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796871547] [2021-07-13 20:41:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:47,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:47,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796871547] [2021-07-13 20:41:47,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796871547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46680646] [2021-07-13 20:41:47,470 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 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 [2021-07-13 20:41:47,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:47,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:47,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:41:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:47,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46680646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:47,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-13 20:41:47,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895582899] [2021-07-13 20:41:47,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:47,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:47,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:47,560 INFO L87 Difference]: Start difference. First operand 629 states and 1681 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:41:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:47,623 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-07-13 20:41:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:47,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 28 [2021-07-13 20:41:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:47,626 INFO L225 Difference]: With dead ends: 722 [2021-07-13 20:41:47,626 INFO L226 Difference]: Without dead ends: 682 [2021-07-13 20:41:47,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-07-13 20:41:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-07-13 20:41:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.645104895104895) internal successors, (1513), 572 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-07-13 20:41:47,634 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-07-13 20:41:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:47,634 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-07-13 20:41:47,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:41:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-07-13 20:41:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:47,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:47,635 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, 1, 1, 1, 1] [2021-07-13 20:41:47,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 20:41:47,852 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:47,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1532662758, now seen corresponding path program 15 times [2021-07-13 20:41:47,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:47,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007105000] [2021-07-13 20:41:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:47,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:47,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007105000] [2021-07-13 20:41:47,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007105000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:47,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847423253] [2021-07-13 20:41:47,925 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 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 [2021-07-13 20:41:47,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:47,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:47,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:41:47,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847423253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:48,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:41:48,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695288639] [2021-07-13 20:41:48,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:48,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:48,076 INFO L87 Difference]: Start difference. First operand 573 states and 1513 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-07-13 20:41:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:48,237 INFO L93 Difference]: Finished difference Result 800 states and 2048 transitions. [2021-07-13 20:41:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:41:48,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 [2021-07-13 20:41:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:48,240 INFO L225 Difference]: With dead ends: 800 [2021-07-13 20:41:48,240 INFO L226 Difference]: Without dead ends: 762 [2021-07-13 20:41:48,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-13 20:41:48,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 543. [2021-07-13 20:41:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.6457564575645756) internal successors, (1434), 542 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-07-13 20:41:48,248 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-07-13 20:41:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:48,248 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-07-13 20:41:48,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-07-13 20:41:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-07-13 20:41:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:48,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:48,249 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:48,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:41:48,464 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:48,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:48,464 INFO L82 PathProgramCache]: Analyzing trace with hash 489628624, now seen corresponding path program 16 times [2021-07-13 20:41:48,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:48,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396966275] [2021-07-13 20:41:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396966275] [2021-07-13 20:41:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396966275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640411283] [2021-07-13 20:41:48,497 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 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 [2021-07-13 20:41:48,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:48,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:48,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640411283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:48,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:41:48,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009245518] [2021-07-13 20:41:48,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:48,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:48,600 INFO L87 Difference]: Start difference. First operand 543 states and 1434 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-07-13 20:41:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:48,757 INFO L93 Difference]: Finished difference Result 1421 states and 3594 transitions. [2021-07-13 20:41:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:41:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 31 [2021-07-13 20:41:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:48,762 INFO L225 Difference]: With dead ends: 1421 [2021-07-13 20:41:48,762 INFO L226 Difference]: Without dead ends: 1421 [2021-07-13 20:41:48,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:41:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-07-13 20:41:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 689. [2021-07-13 20:41:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.7107558139534884) internal successors, (1865), 688 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1865 transitions. [2021-07-13 20:41:48,775 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1865 transitions. Word has length 31 [2021-07-13 20:41:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:48,775 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 1865 transitions. [2021-07-13 20:41:48,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-07-13 20:41:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1865 transitions. [2021-07-13 20:41:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:48,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:48,776 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:48,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:41:48,995 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1586150698, now seen corresponding path program 17 times [2021-07-13 20:41:48,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:48,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564746100] [2021-07-13 20:41:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:49,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:49,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564746100] [2021-07-13 20:41:49,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564746100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:49,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826692051] [2021-07-13 20:41:49,017 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 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 [2021-07-13 20:41:49,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:49,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:49,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:49,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826692051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:49,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:49,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:41:49,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478406335] [2021-07-13 20:41:49,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:49,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:49,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:49,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:49,127 INFO L87 Difference]: Start difference. First operand 689 states and 1865 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-07-13 20:41:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:49,331 INFO L93 Difference]: Finished difference Result 1816 states and 4728 transitions. [2021-07-13 20:41:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:41:49,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 31 [2021-07-13 20:41:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:49,336 INFO L225 Difference]: With dead ends: 1816 [2021-07-13 20:41:49,337 INFO L226 Difference]: Without dead ends: 1762 [2021-07-13 20:41:49,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:41:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-07-13 20:41:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 911. [2021-07-13 20:41:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.767032967032967) internal successors, (2518), 910 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2518 transitions. [2021-07-13 20:41:49,353 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2518 transitions. Word has length 31 [2021-07-13 20:41:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:49,353 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 2518 transitions. [2021-07-13 20:41:49,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-07-13 20:41:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2518 transitions. [2021-07-13 20:41:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:49,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:49,355 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:41:49,569 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2002810338, now seen corresponding path program 18 times [2021-07-13 20:41:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881239874] [2021-07-13 20:41:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:49,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881239874] [2021-07-13 20:41:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881239874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393893596] [2021-07-13 20:41:49,590 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 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 [2021-07-13 20:41:49,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:49,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:49,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:49,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:49,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393893596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:49,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:49,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:41:49,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648852004] [2021-07-13 20:41:49,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:49,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:49,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:49,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:49,679 INFO L87 Difference]: Start difference. First operand 911 states and 2518 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) [2021-07-13 20:41:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:49,863 INFO L93 Difference]: Finished difference Result 2384 states and 6254 transitions. [2021-07-13 20:41:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:41:49,864 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 31 [2021-07-13 20:41:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:49,869 INFO L225 Difference]: With dead ends: 2384 [2021-07-13 20:41:49,869 INFO L226 Difference]: Without dead ends: 2384 [2021-07-13 20:41:49,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:41:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-13 20:41:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1348. [2021-07-13 20:41:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 2.834446919079436) internal successors, (3818), 1347 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3818 transitions. [2021-07-13 20:41:49,896 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3818 transitions. Word has length 31 [2021-07-13 20:41:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:49,896 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 3818 transitions. [2021-07-13 20:41:49,896 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) [2021-07-13 20:41:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3818 transitions. [2021-07-13 20:41:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:49,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:49,898 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:50,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:41:50,113 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1625839184, now seen corresponding path program 19 times [2021-07-13 20:41:50,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:50,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662755795] [2021-07-13 20:41:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:50,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662755795] [2021-07-13 20:41:50,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662755795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234141129] [2021-07-13 20:41:50,130 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 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 [2021-07-13 20:41:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:50,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234141129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:50,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:41:50,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37392510] [2021-07-13 20:41:50,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:50,231 INFO L87 Difference]: Start difference. First operand 1348 states and 3818 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) [2021-07-13 20:41:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:50,386 INFO L93 Difference]: Finished difference Result 1975 states and 5312 transitions. [2021-07-13 20:41:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:41:50,386 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 31 [2021-07-13 20:41:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:50,390 INFO L225 Difference]: With dead ends: 1975 [2021-07-13 20:41:50,390 INFO L226 Difference]: Without dead ends: 1961 [2021-07-13 20:41:50,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-07-13 20:41:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1355. [2021-07-13 20:41:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 2.826440177252585) internal successors, (3827), 1354 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3827 transitions. [2021-07-13 20:41:50,415 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3827 transitions. Word has length 31 [2021-07-13 20:41:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:50,415 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 3827 transitions. [2021-07-13 20:41:50,415 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) [2021-07-13 20:41:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3827 transitions. [2021-07-13 20:41:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:50,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:50,417 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:50,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:50,634 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash 263951710, now seen corresponding path program 20 times [2021-07-13 20:41:50,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:50,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90137079] [2021-07-13 20:41:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:50,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:50,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90137079] [2021-07-13 20:41:50,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90137079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012597670] [2021-07-13 20:41:50,652 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 [2021-07-13 20:41:50,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:50,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:50,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012597670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:50,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:41:50,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166253095] [2021-07-13 20:41:50,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:50,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:50,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:50,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:50,747 INFO L87 Difference]: Start difference. First operand 1355 states and 3827 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-07-13 20:41:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:50,923 INFO L93 Difference]: Finished difference Result 2619 states and 7016 transitions. [2021-07-13 20:41:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:41:50,923 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 31 [2021-07-13 20:41:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:50,928 INFO L225 Difference]: With dead ends: 2619 [2021-07-13 20:41:50,928 INFO L226 Difference]: Without dead ends: 2619 [2021-07-13 20:41:50,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-07-13 20:41:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1783. [2021-07-13 20:41:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 2.8434343434343434) internal successors, (5067), 1782 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 5067 transitions. [2021-07-13 20:41:50,977 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 5067 transitions. Word has length 31 [2021-07-13 20:41:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:50,978 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 5067 transitions. [2021-07-13 20:41:50,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-07-13 20:41:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 5067 transitions. [2021-07-13 20:41:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:50,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:50,982 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:51,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:41:51,197 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash 53254664, now seen corresponding path program 21 times [2021-07-13 20:41:51,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:51,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138991197] [2021-07-13 20:41:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:51,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:51,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138991197] [2021-07-13 20:41:51,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138991197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:51,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478030057] [2021-07-13 20:41:51,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:41:51,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:41:51,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:51,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:51,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478030057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:51,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:51,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:41:51,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442168543] [2021-07-13 20:41:51,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:51,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:51,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:51,309 INFO L87 Difference]: Start difference. First operand 1783 states and 5067 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) [2021-07-13 20:41:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:51,464 INFO L93 Difference]: Finished difference Result 2576 states and 7002 transitions. [2021-07-13 20:41:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:41:51,465 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 31 [2021-07-13 20:41:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:51,469 INFO L225 Difference]: With dead ends: 2576 [2021-07-13 20:41:51,469 INFO L226 Difference]: Without dead ends: 2564 [2021-07-13 20:41:51,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:41:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-07-13 20:41:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1973. [2021-07-13 20:41:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.859026369168357) internal successors, (5638), 1972 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5638 transitions. [2021-07-13 20:41:51,504 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5638 transitions. Word has length 31 [2021-07-13 20:41:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:51,504 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 5638 transitions. [2021-07-13 20:41:51,505 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) [2021-07-13 20:41:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5638 transitions. [2021-07-13 20:41:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:51,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:51,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:51,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:51,721 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash 405035328, now seen corresponding path program 22 times [2021-07-13 20:41:51,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:51,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134686372] [2021-07-13 20:41:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:51,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:51,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134686372] [2021-07-13 20:41:51,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134686372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:51,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953512182] [2021-07-13 20:41:51,747 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 [2021-07-13 20:41:51,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:51,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:51,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953512182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:51,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:51,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:41:51,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523950575] [2021-07-13 20:41:51,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:51,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:51,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:51,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:51,848 INFO L87 Difference]: Start difference. First operand 1973 states and 5638 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) [2021-07-13 20:41:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:52,014 INFO L93 Difference]: Finished difference Result 2743 states and 7432 transitions. [2021-07-13 20:41:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:41:52,014 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 31 [2021-07-13 20:41:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:52,019 INFO L225 Difference]: With dead ends: 2743 [2021-07-13 20:41:52,019 INFO L226 Difference]: Without dead ends: 2729 [2021-07-13 20:41:52,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-07-13 20:41:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 1973. [2021-07-13 20:41:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.849898580121704) internal successors, (5620), 1972 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5620 transitions. [2021-07-13 20:41:52,063 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5620 transitions. Word has length 31 [2021-07-13 20:41:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:52,063 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 5620 transitions. [2021-07-13 20:41:52,063 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) [2021-07-13 20:41:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5620 transitions. [2021-07-13 20:41:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:52,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:52,066 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:52,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:41:52,282 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:52,282 INFO L82 PathProgramCache]: Analyzing trace with hash 489434102, now seen corresponding path program 23 times [2021-07-13 20:41:52,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:52,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433574861] [2021-07-13 20:41:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:52,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433574861] [2021-07-13 20:41:52,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433574861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450686740] [2021-07-13 20:41:52,311 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 [2021-07-13 20:41:52,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:52,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:52,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450686740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:52,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:41:52,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140341890] [2021-07-13 20:41:52,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:52,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:52,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:52,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:52,398 INFO L87 Difference]: Start difference. First operand 1973 states and 5620 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) [2021-07-13 20:41:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:52,560 INFO L93 Difference]: Finished difference Result 2813 states and 7678 transitions. [2021-07-13 20:41:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:41:52,560 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 31 [2021-07-13 20:41:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:52,565 INFO L225 Difference]: With dead ends: 2813 [2021-07-13 20:41:52,565 INFO L226 Difference]: Without dead ends: 2757 [2021-07-13 20:41:52,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:41:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2021-07-13 20:41:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2129. [2021-07-13 20:41:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 2.8482142857142856) internal successors, (6061), 2128 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 6061 transitions. [2021-07-13 20:41:52,599 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 6061 transitions. Word has length 31 [2021-07-13 20:41:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:52,600 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 6061 transitions. [2021-07-13 20:41:52,600 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) [2021-07-13 20:41:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 6061 transitions. [2021-07-13 20:41:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:52,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:52,603 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:52,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:52,809 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1917586888, now seen corresponding path program 24 times [2021-07-13 20:41:52,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:52,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36989623] [2021-07-13 20:41:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:52,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36989623] [2021-07-13 20:41:52,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36989623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183162976] [2021-07-13 20:41:52,831 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 [2021-07-13 20:41:52,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:52,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183162976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:52,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:52,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550642175] [2021-07-13 20:41:52,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:52,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:52,928 INFO L87 Difference]: Start difference. First operand 2129 states and 6061 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-07-13 20:41:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:53,125 INFO L93 Difference]: Finished difference Result 3600 states and 9716 transitions. [2021-07-13 20:41:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:41:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-07-13 20:41:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:53,134 INFO L225 Difference]: With dead ends: 3600 [2021-07-13 20:41:53,134 INFO L226 Difference]: Without dead ends: 3600 [2021-07-13 20:41:53,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:41:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-07-13 20:41:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2306. [2021-07-13 20:41:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.8620390455531455) internal successors, (6597), 2305 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 6597 transitions. [2021-07-13 20:41:53,179 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 6597 transitions. Word has length 31 [2021-07-13 20:41:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:53,180 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 6597 transitions. [2021-07-13 20:41:53,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-07-13 20:41:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 6597 transitions. [2021-07-13 20:41:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:53,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:53,183 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:53,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 20:41:53,400 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:53,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1706889842, now seen corresponding path program 25 times [2021-07-13 20:41:53,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:53,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346899647] [2021-07-13 20:41:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:53,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346899647] [2021-07-13 20:41:53,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346899647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931877686] [2021-07-13 20:41:53,425 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 [2021-07-13 20:41:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:53,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:53,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931877686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:53,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:53,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:53,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153892626] [2021-07-13 20:41:53,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:53,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:53,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:53,525 INFO L87 Difference]: Start difference. First operand 2306 states and 6597 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) [2021-07-13 20:41:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:53,698 INFO L93 Difference]: Finished difference Result 3297 states and 9029 transitions. [2021-07-13 20:41:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:41:53,698 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 31 [2021-07-13 20:41:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:53,703 INFO L225 Difference]: With dead ends: 3297 [2021-07-13 20:41:53,703 INFO L226 Difference]: Without dead ends: 3285 [2021-07-13 20:41:53,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:41:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2021-07-13 20:41:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 2306. [2021-07-13 20:41:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.8603036876355747) internal successors, (6593), 2305 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 6593 transitions. [2021-07-13 20:41:53,752 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 6593 transitions. Word has length 31 [2021-07-13 20:41:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:53,753 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 6593 transitions. [2021-07-13 20:41:53,753 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) [2021-07-13 20:41:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 6593 transitions. [2021-07-13 20:41:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:53,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:53,757 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:53,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:53,977 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:53,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1859325636, now seen corresponding path program 26 times [2021-07-13 20:41:53,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:53,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28929314] [2021-07-13 20:41:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:54,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28929314] [2021-07-13 20:41:54,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28929314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786952939] [2021-07-13 20:41:54,002 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 [2021-07-13 20:41:54,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:54,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:54,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:54,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786952939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:54,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:54,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718051432] [2021-07-13 20:41:54,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:54,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:54,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:54,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:54,102 INFO L87 Difference]: Start difference. First operand 2306 states and 6593 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) [2021-07-13 20:41:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:54,325 INFO L93 Difference]: Finished difference Result 3570 states and 9670 transitions. [2021-07-13 20:41:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:41:54,325 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 31 [2021-07-13 20:41:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:54,330 INFO L225 Difference]: With dead ends: 3570 [2021-07-13 20:41:54,330 INFO L226 Difference]: Without dead ends: 3563 [2021-07-13 20:41:54,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:41:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-07-13 20:41:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2380. [2021-07-13 20:41:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.851618327028163) internal successors, (6784), 2379 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 6784 transitions. [2021-07-13 20:41:54,373 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 6784 transitions. Word has length 31 [2021-07-13 20:41:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:54,373 INFO L482 AbstractCegarLoop]: Abstraction has 2380 states and 6784 transitions. [2021-07-13 20:41:54,373 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) [2021-07-13 20:41:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 6784 transitions. [2021-07-13 20:41:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:54,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:54,377 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:54,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 20:41:54,593 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2058670506, now seen corresponding path program 27 times [2021-07-13 20:41:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:54,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834021010] [2021-07-13 20:41:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:54,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834021010] [2021-07-13 20:41:54,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834021010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879575257] [2021-07-13 20:41:54,614 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 [2021-07-13 20:41:54,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:41:54,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:54,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:54,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879575257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:54,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:54,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849971567] [2021-07-13 20:41:54,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:54,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:54,692 INFO L87 Difference]: Start difference. First operand 2380 states and 6784 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) [2021-07-13 20:41:54,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:54,874 INFO L93 Difference]: Finished difference Result 3591 states and 9701 transitions. [2021-07-13 20:41:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:41:54,874 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 31 [2021-07-13 20:41:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:54,879 INFO L225 Difference]: With dead ends: 3591 [2021-07-13 20:41:54,879 INFO L226 Difference]: Without dead ends: 3577 [2021-07-13 20:41:54,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:41:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2021-07-13 20:41:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 2306. [2021-07-13 20:41:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.8412147505422993) internal successors, (6549), 2305 states have internal predecessors, (6549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 6549 transitions. [2021-07-13 20:41:54,917 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 6549 transitions. Word has length 31 [2021-07-13 20:41:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:54,918 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 6549 transitions. [2021-07-13 20:41:54,918 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) [2021-07-13 20:41:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 6549 transitions. [2021-07-13 20:41:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:54,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:54,921 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:55,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:55,137 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2143069280, now seen corresponding path program 28 times [2021-07-13 20:41:55,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:55,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52040050] [2021-07-13 20:41:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:55,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52040050] [2021-07-13 20:41:55,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52040050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113178959] [2021-07-13 20:41:55,167 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 [2021-07-13 20:41:55,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:55,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:55,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113178959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:55,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:55,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3545228] [2021-07-13 20:41:55,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:55,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:55,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:55,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:55,250 INFO L87 Difference]: Start difference. First operand 2306 states and 6549 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) [2021-07-13 20:41:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:55,393 INFO L93 Difference]: Finished difference Result 3174 states and 8705 transitions. [2021-07-13 20:41:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:55,394 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 31 [2021-07-13 20:41:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:55,398 INFO L225 Difference]: With dead ends: 3174 [2021-07-13 20:41:55,399 INFO L226 Difference]: Without dead ends: 3146 [2021-07-13 20:41:55,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-07-13 20:41:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2306. [2021-07-13 20:41:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.836008676789588) internal successors, (6537), 2305 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 6537 transitions. [2021-07-13 20:41:55,457 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 6537 transitions. Word has length 31 [2021-07-13 20:41:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:55,457 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 6537 transitions. [2021-07-13 20:41:55,457 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) [2021-07-13 20:41:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 6537 transitions. [2021-07-13 20:41:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:55,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:55,461 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:55,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:41:55,673 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:55,673 INFO L82 PathProgramCache]: Analyzing trace with hash -187022174, now seen corresponding path program 29 times [2021-07-13 20:41:55,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:55,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640066030] [2021-07-13 20:41:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:55,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640066030] [2021-07-13 20:41:55,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640066030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240725819] [2021-07-13 20:41:55,694 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 [2021-07-13 20:41:55,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:55,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:55,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:55,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240725819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:55,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:55,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:41:55,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959228746] [2021-07-13 20:41:55,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:41:55,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:41:55,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:41:55,769 INFO L87 Difference]: Start difference. First operand 2306 states and 6537 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:41:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:55,867 INFO L93 Difference]: Finished difference Result 2920 states and 8110 transitions. [2021-07-13 20:41:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:55,867 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-07-13 20:41:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:55,870 INFO L225 Difference]: With dead ends: 2920 [2021-07-13 20:41:55,871 INFO L226 Difference]: Without dead ends: 2920 [2021-07-13 20:41:55,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-07-13 20:41:55,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 2241. [2021-07-13 20:41:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8401785714285714) internal successors, (6362), 2240 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6362 transitions. [2021-07-13 20:41:55,903 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6362 transitions. Word has length 31 [2021-07-13 20:41:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:55,903 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 6362 transitions. [2021-07-13 20:41:55,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:41:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6362 transitions. [2021-07-13 20:41:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:55,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:55,907 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:56,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:41:56,121 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1705952112, now seen corresponding path program 30 times [2021-07-13 20:41:56,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:56,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751126159] [2021-07-13 20:41:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:56,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751126159] [2021-07-13 20:41:56,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751126159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108599529] [2021-07-13 20:41:56,146 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 [2021-07-13 20:41:56,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:56,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:56,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108599529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:56,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:41:56,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711314314] [2021-07-13 20:41:56,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:41:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:41:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:41:56,242 INFO L87 Difference]: Start difference. First operand 2241 states and 6362 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:41:56,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:56,311 INFO L93 Difference]: Finished difference Result 2879 states and 8010 transitions. [2021-07-13 20:41:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:56,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-07-13 20:41:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:56,315 INFO L225 Difference]: With dead ends: 2879 [2021-07-13 20:41:56,315 INFO L226 Difference]: Without dead ends: 2834 [2021-07-13 20:41:56,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-07-13 20:41:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2241. [2021-07-13 20:41:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8370535714285716) internal successors, (6355), 2240 states have internal predecessors, (6355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6355 transitions. [2021-07-13 20:41:56,344 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6355 transitions. Word has length 31 [2021-07-13 20:41:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:56,344 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 6355 transitions. [2021-07-13 20:41:56,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:41:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6355 transitions. [2021-07-13 20:41:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:56,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:56,348 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:56,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:41:56,561 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1126224482, now seen corresponding path program 31 times [2021-07-13 20:41:56,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:56,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122079861] [2021-07-13 20:41:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:56,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122079861] [2021-07-13 20:41:56,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122079861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004062394] [2021-07-13 20:41:56,595 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:41:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:56,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:56,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004062394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:56,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:56,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:41:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317185398] [2021-07-13 20:41:56,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:41:56,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:56,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:41:56,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:41:56,680 INFO L87 Difference]: Start difference. First operand 2241 states and 6355 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:41:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:56,768 INFO L93 Difference]: Finished difference Result 2749 states and 7653 transitions. [2021-07-13 20:41:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-07-13 20:41:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:56,772 INFO L225 Difference]: With dead ends: 2749 [2021-07-13 20:41:56,772 INFO L226 Difference]: Without dead ends: 2749 [2021-07-13 20:41:56,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-07-13 20:41:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2283. [2021-07-13 20:41:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 2.837861524978089) internal successors, (6476), 2282 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 6476 transitions. [2021-07-13 20:41:56,800 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 6476 transitions. Word has length 31 [2021-07-13 20:41:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:56,800 INFO L482 AbstractCegarLoop]: Abstraction has 2283 states and 6476 transitions. [2021-07-13 20:41:56,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:41:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 6476 transitions. [2021-07-13 20:41:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:56,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:56,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:57,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:41:57,014 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash -267703438, now seen corresponding path program 32 times [2021-07-13 20:41:57,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:57,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598258875] [2021-07-13 20:41:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:57,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598258875] [2021-07-13 20:41:57,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598258875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390683604] [2021-07-13 20:41:57,044 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 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 [2021-07-13 20:41:57,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:57,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:57,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390683604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:57,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:41:57,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277102996] [2021-07-13 20:41:57,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:41:57,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:41:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:41:57,120 INFO L87 Difference]: Start difference. First operand 2283 states and 6476 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:41:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:57,192 INFO L93 Difference]: Finished difference Result 2968 states and 8247 transitions. [2021-07-13 20:41:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:41:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-07-13 20:41:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:57,196 INFO L225 Difference]: With dead ends: 2968 [2021-07-13 20:41:57,196 INFO L226 Difference]: Without dead ends: 2932 [2021-07-13 20:41:57,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-07-13 20:41:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2283. [2021-07-13 20:41:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 2.8352322524101665) internal successors, (6470), 2282 states have internal predecessors, (6470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 6470 transitions. [2021-07-13 20:41:57,225 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 6470 transitions. Word has length 31 [2021-07-13 20:41:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:57,225 INFO L482 AbstractCegarLoop]: Abstraction has 2283 states and 6470 transitions. [2021-07-13 20:41:57,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:41:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 6470 transitions. [2021-07-13 20:41:57,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:57,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:57,229 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:57,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:41:57,445 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash 979746500, now seen corresponding path program 33 times [2021-07-13 20:41:57,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:57,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549727232] [2021-07-13 20:41:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:57,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549727232] [2021-07-13 20:41:57,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549727232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725375955] [2021-07-13 20:41:57,466 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 [2021-07-13 20:41:57,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:57,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:57,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:57,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725375955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:57,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:57,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950159392] [2021-07-13 20:41:57,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:57,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:57,555 INFO L87 Difference]: Start difference. First operand 2283 states and 6470 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-07-13 20:41:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:57,687 INFO L93 Difference]: Finished difference Result 2886 states and 7982 transitions. [2021-07-13 20:41:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:41:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-07-13 20:41:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:57,691 INFO L225 Difference]: With dead ends: 2886 [2021-07-13 20:41:57,691 INFO L226 Difference]: Without dead ends: 2886 [2021-07-13 20:41:57,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-07-13 20:41:57,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2463. [2021-07-13 20:41:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.8399675060926075) internal successors, (6992), 2462 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6992 transitions. [2021-07-13 20:41:57,725 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6992 transitions. Word has length 31 [2021-07-13 20:41:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:57,725 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6992 transitions. [2021-07-13 20:41:57,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-07-13 20:41:57,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6992 transitions. [2021-07-13 20:41:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:57,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:57,728 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:57,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:57,942 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash -948731430, now seen corresponding path program 34 times [2021-07-13 20:41:57,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:57,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694040829] [2021-07-13 20:41:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694040829] [2021-07-13 20:41:57,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694040829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899775161] [2021-07-13 20:41:57,965 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 [2021-07-13 20:41:57,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:57,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899775161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:58,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:58,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095792854] [2021-07-13 20:41:58,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:58,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:58,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:58,056 INFO L87 Difference]: Start difference. First operand 2463 states and 6992 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) [2021-07-13 20:41:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:58,203 INFO L93 Difference]: Finished difference Result 3361 states and 9214 transitions. [2021-07-13 20:41:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:41:58,203 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 31 [2021-07-13 20:41:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:58,209 INFO L225 Difference]: With dead ends: 3361 [2021-07-13 20:41:58,209 INFO L226 Difference]: Without dead ends: 3337 [2021-07-13 20:41:58,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:41:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-07-13 20:41:58,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2543. [2021-07-13 20:41:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2542 states have (on average 2.841856805664831) internal successors, (7224), 2542 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 7224 transitions. [2021-07-13 20:41:58,259 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 7224 transitions. Word has length 31 [2021-07-13 20:41:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:58,259 INFO L482 AbstractCegarLoop]: Abstraction has 2543 states and 7224 transitions. [2021-07-13 20:41:58,259 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) [2021-07-13 20:41:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 7224 transitions. [2021-07-13 20:41:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:58,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:58,263 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:58,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 20:41:58,464 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2013521954, now seen corresponding path program 35 times [2021-07-13 20:41:58,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:58,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442456365] [2021-07-13 20:41:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:58,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442456365] [2021-07-13 20:41:58,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442456365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210241000] [2021-07-13 20:41:58,487 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 [2021-07-13 20:41:58,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:58,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:58,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:58,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:58,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210241000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:58,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:58,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:58,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672383860] [2021-07-13 20:41:58,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:58,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:58,591 INFO L87 Difference]: Start difference. First operand 2543 states and 7224 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-07-13 20:41:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:58,799 INFO L93 Difference]: Finished difference Result 3726 states and 10138 transitions. [2021-07-13 20:41:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:41:58,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-07-13 20:41:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:58,804 INFO L225 Difference]: With dead ends: 3726 [2021-07-13 20:41:58,804 INFO L226 Difference]: Without dead ends: 3726 [2021-07-13 20:41:58,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:41:58,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2021-07-13 20:41:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 2713. [2021-07-13 20:41:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.864675516224189) internal successors, (7769), 2712 states have internal predecessors, (7769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7769 transitions. [2021-07-13 20:41:58,842 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7769 transitions. Word has length 31 [2021-07-13 20:41:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:58,842 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7769 transitions. [2021-07-13 20:41:58,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-07-13 20:41:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7769 transitions. [2021-07-13 20:41:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:58,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:58,846 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:59,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:59,062 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1802824908, now seen corresponding path program 36 times [2021-07-13 20:41:59,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:59,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098938870] [2021-07-13 20:41:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098938870] [2021-07-13 20:41:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098938870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761698485] [2021-07-13 20:41:59,082 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 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 [2021-07-13 20:41:59,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:41:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:59,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761698485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:59,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:59,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759707994] [2021-07-13 20:41:59,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:59,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:59,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:59,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:59,165 INFO L87 Difference]: Start difference. First operand 2713 states and 7769 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) [2021-07-13 20:41:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:59,350 INFO L93 Difference]: Finished difference Result 4042 states and 11134 transitions. [2021-07-13 20:41:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:41:59,351 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 31 [2021-07-13 20:41:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:59,368 INFO L225 Difference]: With dead ends: 4042 [2021-07-13 20:41:59,368 INFO L226 Difference]: Without dead ends: 4030 [2021-07-13 20:41:59,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:41:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-07-13 20:41:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 2949. [2021-07-13 20:41:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 2.8666892808683855) internal successors, (8451), 2948 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 8451 transitions. [2021-07-13 20:41:59,410 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 8451 transitions. Word has length 31 [2021-07-13 20:41:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:59,410 INFO L482 AbstractCegarLoop]: Abstraction has 2949 states and 8451 transitions. [2021-07-13 20:41:59,410 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) [2021-07-13 20:41:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 8451 transitions. [2021-07-13 20:41:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:59,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:59,414 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:41:59,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:59,615 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:59,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1763390570, now seen corresponding path program 37 times [2021-07-13 20:41:59,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:59,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278012533] [2021-07-13 20:41:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:59,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278012533] [2021-07-13 20:41:59,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278012533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675818233] [2021-07-13 20:41:59,636 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 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 [2021-07-13 20:41:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:41:59,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675818233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:59,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:41:59,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293374086] [2021-07-13 20:41:59,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:59,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:59,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:59,714 INFO L87 Difference]: Start difference. First operand 2949 states and 8451 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) [2021-07-13 20:41:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:59,918 INFO L93 Difference]: Finished difference Result 4070 states and 11132 transitions. [2021-07-13 20:41:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:41:59,918 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 31 [2021-07-13 20:41:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:59,923 INFO L225 Difference]: With dead ends: 4070 [2021-07-13 20:41:59,923 INFO L226 Difference]: Without dead ends: 4070 [2021-07-13 20:41:59,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:41:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2021-07-13 20:41:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 2953. [2021-07-13 20:41:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2952 states have (on average 2.858739837398374) internal successors, (8439), 2952 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 8439 transitions. [2021-07-13 20:41:59,967 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 8439 transitions. Word has length 31 [2021-07-13 20:41:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:59,967 INFO L482 AbstractCegarLoop]: Abstraction has 2953 states and 8439 transitions. [2021-07-13 20:41:59,967 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) [2021-07-13 20:41:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 8439 transitions. [2021-07-13 20:41:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:41:59,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:59,971 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:00,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:00,172 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2140361724, now seen corresponding path program 38 times [2021-07-13 20:42:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:00,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233745139] [2021-07-13 20:42:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:00,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:00,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233745139] [2021-07-13 20:42:00,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233745139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:00,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421046980] [2021-07-13 20:42:00,193 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 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 [2021-07-13 20:42:00,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:42:00,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:00,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421046980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:00,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:00,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:42:00,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154540703] [2021-07-13 20:42:00,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:42:00,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:00,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:42:00,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:42:00,271 INFO L87 Difference]: Start difference. First operand 2953 states and 8439 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) [2021-07-13 20:42:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:00,431 INFO L93 Difference]: Finished difference Result 3516 states and 9756 transitions. [2021-07-13 20:42:00,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:42:00,432 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 31 [2021-07-13 20:42:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:00,436 INFO L225 Difference]: With dead ends: 3516 [2021-07-13 20:42:00,436 INFO L226 Difference]: Without dead ends: 3502 [2021-07-13 20:42:00,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-07-13 20:42:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2953. [2021-07-13 20:42:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2952 states have (on average 2.856707317073171) internal successors, (8433), 2952 states have internal predecessors, (8433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 8433 transitions. [2021-07-13 20:42:00,475 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 8433 transitions. Word has length 31 [2021-07-13 20:42:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:00,475 INFO L482 AbstractCegarLoop]: Abstraction has 2953 states and 8433 transitions. [2021-07-13 20:42:00,475 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) [2021-07-13 20:42:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 8433 transitions. [2021-07-13 20:42:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:42:00,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:00,479 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:00,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:42:00,682 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:00,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:00,682 INFO L82 PathProgramCache]: Analyzing trace with hash 157269054, now seen corresponding path program 39 times [2021-07-13 20:42:00,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:00,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875833982] [2021-07-13 20:42:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:00,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:00,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875833982] [2021-07-13 20:42:00,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875833982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:00,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355118243] [2021-07-13 20:42:00,706 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 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 [2021-07-13 20:42:00,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:42:00,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:42:00,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355118243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:00,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:00,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:42:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305746523] [2021-07-13 20:42:00,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:00,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:00,798 INFO L87 Difference]: Start difference. First operand 2953 states and 8433 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-07-13 20:42:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:00,994 INFO L93 Difference]: Finished difference Result 4026 states and 11165 transitions. [2021-07-13 20:42:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:42:00,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 31 [2021-07-13 20:42:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:01,000 INFO L225 Difference]: With dead ends: 4026 [2021-07-13 20:42:01,000 INFO L226 Difference]: Without dead ends: 4026 [2021-07-13 20:42:01,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:42:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-07-13 20:42:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3009. [2021-07-13 20:42:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.849401595744681) internal successors, (8571), 3008 states have internal predecessors, (8571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8571 transitions. [2021-07-13 20:42:01,042 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8571 transitions. Word has length 31 [2021-07-13 20:42:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:01,042 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 8571 transitions. [2021-07-13 20:42:01,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-07-13 20:42:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8571 transitions. [2021-07-13 20:42:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:42:01,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:01,046 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:01,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:01,247 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1056564424, now seen corresponding path program 40 times [2021-07-13 20:42:01,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:01,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732492945] [2021-07-13 20:42:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:01,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:01,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732492945] [2021-07-13 20:42:01,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732492945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197038121] [2021-07-13 20:42:01,265 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 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 [2021-07-13 20:42:01,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:01,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:01,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:42:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:01,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197038121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:01,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:42:01,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418553975] [2021-07-13 20:42:01,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:42:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:01,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:42:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:42:01,362 INFO L87 Difference]: Start difference. First operand 3009 states and 8571 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-07-13 20:42:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:01,545 INFO L93 Difference]: Finished difference Result 4589 states and 12658 transitions. [2021-07-13 20:42:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:42:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 31 [2021-07-13 20:42:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:01,551 INFO L225 Difference]: With dead ends: 4589 [2021-07-13 20:42:01,551 INFO L226 Difference]: Without dead ends: 4589 [2021-07-13 20:42:01,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:42:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-07-13 20:42:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 3477. [2021-07-13 20:42:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3477 states, 3476 states have (on average 2.855868814729574) internal successors, (9927), 3476 states have internal predecessors, (9927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3477 states to 3477 states and 9927 transitions. [2021-07-13 20:42:01,602 INFO L78 Accepts]: Start accepts. Automaton has 3477 states and 9927 transitions. Word has length 31 [2021-07-13 20:42:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:01,602 INFO L482 AbstractCegarLoop]: Abstraction has 3477 states and 9927 transitions. [2021-07-13 20:42:01,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-07-13 20:42:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3477 states and 9927 transitions. [2021-07-13 20:42:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:42:01,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:01,606 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:01,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:01,807 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:01,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:01,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1197648042, now seen corresponding path program 41 times [2021-07-13 20:42:01,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:01,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598309101] [2021-07-13 20:42:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:01,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:01,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598309101] [2021-07-13 20:42:01,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598309101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728627671] [2021-07-13 20:42:01,824 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 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 [2021-07-13 20:42:01,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:42:01,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:42:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:01,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728627671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:01,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:01,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:42:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108702769] [2021-07-13 20:42:01,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:42:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:01,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:42:01,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:42:01,915 INFO L87 Difference]: Start difference. First operand 3477 states and 9927 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) [2021-07-13 20:42:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:02,075 INFO L93 Difference]: Finished difference Result 4422 states and 12232 transitions. [2021-07-13 20:42:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:42:02,075 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 31 [2021-07-13 20:42:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:02,080 INFO L225 Difference]: With dead ends: 4422 [2021-07-13 20:42:02,080 INFO L226 Difference]: Without dead ends: 4408 [2021-07-13 20:42:02,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-07-13 20:42:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3319. [2021-07-13 20:42:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 2.8432790837854127) internal successors, (9434), 3318 states have internal predecessors, (9434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 9434 transitions. [2021-07-13 20:42:02,138 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 9434 transitions. Word has length 31 [2021-07-13 20:42:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:02,138 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 9434 transitions. [2021-07-13 20:42:02,138 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) [2021-07-13 20:42:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 9434 transitions. [2021-07-13 20:42:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:42:02,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:02,142 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:02,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:42:02,342 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1282046816, now seen corresponding path program 42 times [2021-07-13 20:42:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:02,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294426701] [2021-07-13 20:42:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:02,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294426701] [2021-07-13 20:42:02,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294426701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498033468] [2021-07-13 20:42:02,363 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 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 [2021-07-13 20:42:02,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:02,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:42:02,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498033468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:02,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:42:02,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452108818] [2021-07-13 20:42:02,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:42:02,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:42:02,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:42:02,449 INFO L87 Difference]: Start difference. First operand 3319 states and 9434 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) [2021-07-13 20:42:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:02,605 INFO L93 Difference]: Finished difference Result 4459 states and 12431 transitions. [2021-07-13 20:42:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:42:02,606 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 31 [2021-07-13 20:42:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:02,611 INFO L225 Difference]: With dead ends: 4459 [2021-07-13 20:42:02,611 INFO L226 Difference]: Without dead ends: 4403 [2021-07-13 20:42:02,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:42:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2021-07-13 20:42:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 3471. [2021-07-13 20:42:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 2.844956772334294) internal successors, (9872), 3470 states have internal predecessors, (9872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 9872 transitions. [2021-07-13 20:42:02,658 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 9872 transitions. Word has length 31 [2021-07-13 20:42:02,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:02,658 INFO L482 AbstractCegarLoop]: Abstraction has 3471 states and 9872 transitions. [2021-07-13 20:42:02,658 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) [2021-07-13 20:42:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 9872 transitions. [2021-07-13 20:42:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:02,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:02,662 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:02,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:42:02,873 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1225160768, now seen corresponding path program 43 times [2021-07-13 20:42:02,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:02,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114167652] [2021-07-13 20:42:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:02,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114167652] [2021-07-13 20:42:02,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114167652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071880808] [2021-07-13 20:42:02,971 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 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 [2021-07-13 20:42:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:02,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071880808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:03,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:42:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951623828] [2021-07-13 20:42:03,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:03,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:03,187 INFO L87 Difference]: Start difference. First operand 3471 states and 9872 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:03,413 INFO L93 Difference]: Finished difference Result 6285 states and 17840 transitions. [2021-07-13 20:42:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:42:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:03,424 INFO L225 Difference]: With dead ends: 6285 [2021-07-13 20:42:03,425 INFO L226 Difference]: Without dead ends: 6179 [2021-07-13 20:42:03,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:42:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6179 states. [2021-07-13 20:42:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6179 to 5621. [2021-07-13 20:42:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 5620 states have (on average 2.877046263345196) internal successors, (16169), 5620 states have internal predecessors, (16169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 16169 transitions. [2021-07-13 20:42:03,502 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 16169 transitions. Word has length 34 [2021-07-13 20:42:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:03,502 INFO L482 AbstractCegarLoop]: Abstraction has 5621 states and 16169 transitions. [2021-07-13 20:42:03,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 16169 transitions. [2021-07-13 20:42:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:03,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:03,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:03,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 20:42:03,709 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:03,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1195720256, now seen corresponding path program 44 times [2021-07-13 20:42:03,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:03,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57107296] [2021-07-13 20:42:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57107296] [2021-07-13 20:42:03,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57107296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095840549] [2021-07-13 20:42:03,802 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 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 [2021-07-13 20:42:03,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:03,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:03,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095840549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:03,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:03,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:42:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709863575] [2021-07-13 20:42:03,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:03,994 INFO L87 Difference]: Start difference. First operand 5621 states and 16169 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:04,224 INFO L93 Difference]: Finished difference Result 6597 states and 18745 transitions. [2021-07-13 20:42:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:42:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:04,232 INFO L225 Difference]: With dead ends: 6597 [2021-07-13 20:42:04,232 INFO L226 Difference]: Without dead ends: 6473 [2021-07-13 20:42:04,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2021-07-13 20:42:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 4677. [2021-07-13 20:42:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4677 states, 4676 states have (on average 2.854790419161677) internal successors, (13349), 4676 states have internal predecessors, (13349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4677 states to 4677 states and 13349 transitions. [2021-07-13 20:42:04,292 INFO L78 Accepts]: Start accepts. Automaton has 4677 states and 13349 transitions. Word has length 34 [2021-07-13 20:42:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:04,293 INFO L482 AbstractCegarLoop]: Abstraction has 4677 states and 13349 transitions. [2021-07-13 20:42:04,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4677 states and 13349 transitions. [2021-07-13 20:42:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:04,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:04,298 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:04,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:04,499 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:04,499 INFO L82 PathProgramCache]: Analyzing trace with hash -907305536, now seen corresponding path program 45 times [2021-07-13 20:42:04,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:04,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951145347] [2021-07-13 20:42:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:04,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:04,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951145347] [2021-07-13 20:42:04,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951145347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:04,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925479275] [2021-07-13 20:42:04,581 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 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 [2021-07-13 20:42:04,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:04,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925479275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:04,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:04,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:42:04,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463224261] [2021-07-13 20:42:04,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:04,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:04,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:04,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:04,754 INFO L87 Difference]: Start difference. First operand 4677 states and 13349 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:04,927 INFO L93 Difference]: Finished difference Result 5786 states and 16296 transitions. [2021-07-13 20:42:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:04,938 INFO L225 Difference]: With dead ends: 5786 [2021-07-13 20:42:04,938 INFO L226 Difference]: Without dead ends: 5662 [2021-07-13 20:42:04,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:04,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5662 states. [2021-07-13 20:42:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5662 to 4645. [2021-07-13 20:42:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4645 states, 4644 states have (on average 2.857235142118863) internal successors, (13269), 4644 states have internal predecessors, (13269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 13269 transitions. [2021-07-13 20:42:04,999 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 13269 transitions. Word has length 34 [2021-07-13 20:42:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:04,999 INFO L482 AbstractCegarLoop]: Abstraction has 4645 states and 13269 transitions. [2021-07-13 20:42:04,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 13269 transitions. [2021-07-13 20:42:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:05,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:05,004 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:05,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:05,205 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash 513398374, now seen corresponding path program 46 times [2021-07-13 20:42:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:05,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832649212] [2021-07-13 20:42:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:05,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:05,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832649212] [2021-07-13 20:42:05,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832649212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185597538] [2021-07-13 20:42:05,340 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:42:05,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:05,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:05,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:05,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:05,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185597538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:05,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:05,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:42:05,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262434404] [2021-07-13 20:42:05,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:05,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:05,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:05,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:05,528 INFO L87 Difference]: Start difference. First operand 4645 states and 13269 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:05,748 INFO L93 Difference]: Finished difference Result 6416 states and 18276 transitions. [2021-07-13 20:42:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:42:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:05,759 INFO L225 Difference]: With dead ends: 6416 [2021-07-13 20:42:05,759 INFO L226 Difference]: Without dead ends: 6334 [2021-07-13 20:42:05,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-07-13 20:42:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5431. [2021-07-13 20:42:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 2.8799263351749538) internal successors, (15638), 5430 states have internal predecessors, (15638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 15638 transitions. [2021-07-13 20:42:05,835 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 15638 transitions. Word has length 34 [2021-07-13 20:42:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:05,835 INFO L482 AbstractCegarLoop]: Abstraction has 5431 states and 15638 transitions. [2021-07-13 20:42:05,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 15638 transitions. [2021-07-13 20:42:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:05,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:05,842 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:06,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:42:06,042 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash 394315362, now seen corresponding path program 47 times [2021-07-13 20:42:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011963829] [2021-07-13 20:42:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:06,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:06,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011963829] [2021-07-13 20:42:06,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011963829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774935082] [2021-07-13 20:42:06,119 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:42:06,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:06,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:06,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774935082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:06,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:42:06,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065965309] [2021-07-13 20:42:06,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:06,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:06,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:06,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:06,334 INFO L87 Difference]: Start difference. First operand 5431 states and 15638 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:06,569 INFO L93 Difference]: Finished difference Result 6415 states and 18268 transitions. [2021-07-13 20:42:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:42:06,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:06,579 INFO L225 Difference]: With dead ends: 6415 [2021-07-13 20:42:06,579 INFO L226 Difference]: Without dead ends: 6303 [2021-07-13 20:42:06,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2021-07-13 20:42:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 5395. [2021-07-13 20:42:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5395 states, 5394 states have (on average 2.8772710418984055) internal successors, (15520), 5394 states have internal predecessors, (15520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 15520 transitions. [2021-07-13 20:42:06,651 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 15520 transitions. Word has length 34 [2021-07-13 20:42:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:06,651 INFO L482 AbstractCegarLoop]: Abstraction has 5395 states and 15520 transitions. [2021-07-13 20:42:06,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 15520 transitions. [2021-07-13 20:42:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:06,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:06,658 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:06,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:42:06,858 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:06,859 INFO L82 PathProgramCache]: Analyzing trace with hash 538602944, now seen corresponding path program 48 times [2021-07-13 20:42:06,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:06,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296594307] [2021-07-13 20:42:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:42:06,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:06,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296594307] [2021-07-13 20:42:06,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296594307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:06,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550758410] [2021-07-13 20:42:06,955 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 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 [2021-07-13 20:42:06,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:06,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:07,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550758410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:07,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:07,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:42:07,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307419450] [2021-07-13 20:42:07,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:07,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:07,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:07,152 INFO L87 Difference]: Start difference. First operand 5395 states and 15520 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:07,281 INFO L93 Difference]: Finished difference Result 6280 states and 17888 transitions. [2021-07-13 20:42:07,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:42:07,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:07,291 INFO L225 Difference]: With dead ends: 6280 [2021-07-13 20:42:07,291 INFO L226 Difference]: Without dead ends: 6163 [2021-07-13 20:42:07,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6163 states. [2021-07-13 20:42:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6163 to 5719. [2021-07-13 20:42:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5719 states, 5718 states have (on average 2.8807275271073802) internal successors, (16472), 5718 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 16472 transitions. [2021-07-13 20:42:07,407 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 16472 transitions. Word has length 34 [2021-07-13 20:42:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:07,408 INFO L482 AbstractCegarLoop]: Abstraction has 5719 states and 16472 transitions. [2021-07-13 20:42:07,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 16472 transitions. [2021-07-13 20:42:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:07,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:07,416 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:07,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:07,631 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1538038144, now seen corresponding path program 49 times [2021-07-13 20:42:07,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:07,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749896450] [2021-07-13 20:42:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:07,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:07,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749896450] [2021-07-13 20:42:07,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749896450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:07,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048359764] [2021-07-13 20:42:07,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:42:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:07,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048359764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:07,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:07,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:42:07,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337361163] [2021-07-13 20:42:07,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:07,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:07,924 INFO L87 Difference]: Start difference. First operand 5719 states and 16472 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:08,116 INFO L93 Difference]: Finished difference Result 6297 states and 17905 transitions. [2021-07-13 20:42:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:08,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:08,127 INFO L225 Difference]: With dead ends: 6297 [2021-07-13 20:42:08,127 INFO L226 Difference]: Without dead ends: 6221 [2021-07-13 20:42:08,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6221 states. [2021-07-13 20:42:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6221 to 5759. [2021-07-13 20:42:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 5758 states have (on average 2.8754775963876344) internal successors, (16557), 5758 states have internal predecessors, (16557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 16557 transitions. [2021-07-13 20:42:08,206 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 16557 transitions. Word has length 34 [2021-07-13 20:42:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:08,206 INFO L482 AbstractCegarLoop]: Abstraction has 5759 states and 16557 transitions. [2021-07-13 20:42:08,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 16557 transitions. [2021-07-13 20:42:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:08,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:08,213 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:08,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:08,429 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1700224024, now seen corresponding path program 50 times [2021-07-13 20:42:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:08,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611172053] [2021-07-13 20:42:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:08,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611172053] [2021-07-13 20:42:08,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611172053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200368045] [2021-07-13 20:42:08,517 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 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 [2021-07-13 20:42:08,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:08,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:42:08,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200368045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:08,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:42:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307910680] [2021-07-13 20:42:08,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:42:08,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:08,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:42:08,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:08,722 INFO L87 Difference]: Start difference. First operand 5759 states and 16557 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:09,322 INFO L93 Difference]: Finished difference Result 9192 states and 26186 transitions. [2021-07-13 20:42:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:42:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:09,337 INFO L225 Difference]: With dead ends: 9192 [2021-07-13 20:42:09,337 INFO L226 Difference]: Without dead ends: 9075 [2021-07-13 20:42:09,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:42:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2021-07-13 20:42:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 6177. [2021-07-13 20:42:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6177 states, 6176 states have (on average 2.8848769430051813) internal successors, (17817), 6176 states have internal predecessors, (17817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6177 states to 6177 states and 17817 transitions. [2021-07-13 20:42:09,441 INFO L78 Accepts]: Start accepts. Automaton has 6177 states and 17817 transitions. Word has length 34 [2021-07-13 20:42:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:09,441 INFO L482 AbstractCegarLoop]: Abstraction has 6177 states and 17817 transitions. [2021-07-13 20:42:09,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 6177 states and 17817 transitions. [2021-07-13 20:42:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:09,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:09,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:09,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:42:09,650 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash -609780788, now seen corresponding path program 51 times [2021-07-13 20:42:09,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:09,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541505085] [2021-07-13 20:42:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:09,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541505085] [2021-07-13 20:42:09,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541505085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180644695] [2021-07-13 20:42:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:42:09,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:09,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:09,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:42:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:09,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180644695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:09,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:09,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:42:09,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192790030] [2021-07-13 20:42:09,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:42:09,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:42:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:09,993 INFO L87 Difference]: Start difference. First operand 6177 states and 17817 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:10,292 INFO L93 Difference]: Finished difference Result 7837 states and 22506 transitions. [2021-07-13 20:42:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:42:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:10,305 INFO L225 Difference]: With dead ends: 7837 [2021-07-13 20:42:10,305 INFO L226 Difference]: Without dead ends: 7747 [2021-07-13 20:42:10,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:42:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7747 states. [2021-07-13 20:42:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7747 to 7535. [2021-07-13 20:42:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7535 states, 7534 states have (on average 2.8967348022298913) internal successors, (21824), 7534 states have internal predecessors, (21824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7535 states to 7535 states and 21824 transitions. [2021-07-13 20:42:10,412 INFO L78 Accepts]: Start accepts. Automaton has 7535 states and 21824 transitions. Word has length 34 [2021-07-13 20:42:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:10,412 INFO L482 AbstractCegarLoop]: Abstraction has 7535 states and 21824 transitions. [2021-07-13 20:42:10,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 7535 states and 21824 transitions. [2021-07-13 20:42:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:10,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:10,422 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:10,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:42:10,623 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1832711224, now seen corresponding path program 52 times [2021-07-13 20:42:10,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:10,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987498928] [2021-07-13 20:42:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:10,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:10,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987498928] [2021-07-13 20:42:10,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987498928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:10,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344127629] [2021-07-13 20:42:10,693 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 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 [2021-07-13 20:42:10,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344127629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:10,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:10,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:42:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486108387] [2021-07-13 20:42:10,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:10,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:10,866 INFO L87 Difference]: Start difference. First operand 7535 states and 21824 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:11,083 INFO L93 Difference]: Finished difference Result 7993 states and 22963 transitions. [2021-07-13 20:42:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:42:11,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:11,098 INFO L225 Difference]: With dead ends: 7993 [2021-07-13 20:42:11,098 INFO L226 Difference]: Without dead ends: 7883 [2021-07-13 20:42:11,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-07-13 20:42:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 7515. [2021-07-13 20:42:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7515 states, 7514 states have (on average 2.8945967527282406) internal successors, (21750), 7514 states have internal predecessors, (21750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 21750 transitions. [2021-07-13 20:42:11,208 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 21750 transitions. Word has length 34 [2021-07-13 20:42:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:11,209 INFO L482 AbstractCegarLoop]: Abstraction has 7515 states and 21750 transitions. [2021-07-13 20:42:11,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 21750 transitions. [2021-07-13 20:42:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:11,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:11,221 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:11,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:11,421 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1436916066, now seen corresponding path program 53 times [2021-07-13 20:42:11,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:11,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700768041] [2021-07-13 20:42:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:11,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700768041] [2021-07-13 20:42:11,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700768041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418404843] [2021-07-13 20:42:11,506 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 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 [2021-07-13 20:42:11,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:11,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:11,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418404843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:11,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:11,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 20:42:11,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081157135] [2021-07-13 20:42:11,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:11,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:11,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:11,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:11,693 INFO L87 Difference]: Start difference. First operand 7515 states and 21750 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:11,857 INFO L93 Difference]: Finished difference Result 8802 states and 25332 transitions. [2021-07-13 20:42:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:11,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:11,872 INFO L225 Difference]: With dead ends: 8802 [2021-07-13 20:42:11,872 INFO L226 Difference]: Without dead ends: 8678 [2021-07-13 20:42:11,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8678 states. [2021-07-13 20:42:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8678 to 8409. [2021-07-13 20:42:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8409 states, 8408 states have (on average 2.9042578496669837) internal successors, (24419), 8408 states have internal predecessors, (24419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 24419 transitions. [2021-07-13 20:42:12,034 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 24419 transitions. Word has length 34 [2021-07-13 20:42:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:12,034 INFO L482 AbstractCegarLoop]: Abstraction has 8409 states and 24419 transitions. [2021-07-13 20:42:12,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 24419 transitions. [2021-07-13 20:42:12,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:12,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:12,046 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:12,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:12,249 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1476529958, now seen corresponding path program 54 times [2021-07-13 20:42:12,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:12,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861344833] [2021-07-13 20:42:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:12,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:12,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861344833] [2021-07-13 20:42:12,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861344833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119236560] [2021-07-13 20:42:12,370 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 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 [2021-07-13 20:42:12,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:12,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:12,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:12,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:12,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119236560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:12,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:12,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-13 20:42:12,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277360286] [2021-07-13 20:42:12,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:42:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:42:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:42:12,527 INFO L87 Difference]: Start difference. First operand 8409 states and 24419 transitions. Second operand has 16 states, 16 states have (on average 2.875) 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) [2021-07-13 20:42:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:12,681 INFO L93 Difference]: Finished difference Result 12458 states and 36267 transitions. [2021-07-13 20:42:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:42:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) 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 34 [2021-07-13 20:42:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:12,702 INFO L225 Difference]: With dead ends: 12458 [2021-07-13 20:42:12,702 INFO L226 Difference]: Without dead ends: 12421 [2021-07-13 20:42:12,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12421 states. [2021-07-13 20:42:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12421 to 8417. [2021-07-13 20:42:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8417 states, 8416 states have (on average 2.9038735741444865) internal successors, (24439), 8416 states have internal predecessors, (24439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8417 states to 8417 states and 24439 transitions. [2021-07-13 20:42:12,839 INFO L78 Accepts]: Start accepts. Automaton has 8417 states and 24439 transitions. Word has length 34 [2021-07-13 20:42:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:12,839 INFO L482 AbstractCegarLoop]: Abstraction has 8417 states and 24439 transitions. [2021-07-13 20:42:12,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) 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) [2021-07-13 20:42:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 8417 states and 24439 transitions. [2021-07-13 20:42:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:12,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:12,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:13,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:13,050 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:13,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1106347742, now seen corresponding path program 55 times [2021-07-13 20:42:13,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:13,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115003431] [2021-07-13 20:42:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:13,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:13,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115003431] [2021-07-13 20:42:13,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115003431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:13,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024446860] [2021-07-13 20:42:13,156 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 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 [2021-07-13 20:42:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:13,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:13,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:13,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024446860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:13,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:13,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:42:13,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729009350] [2021-07-13 20:42:13,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:13,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:13,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:13,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:13,383 INFO L87 Difference]: Start difference. First operand 8417 states and 24439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-13 20:42:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:13,579 INFO L93 Difference]: Finished difference Result 12426 states and 36223 transitions. [2021-07-13 20:42:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:42:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 34 [2021-07-13 20:42:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:13,604 INFO L225 Difference]: With dead ends: 12426 [2021-07-13 20:42:13,604 INFO L226 Difference]: Without dead ends: 12389 [2021-07-13 20:42:13,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12389 states. [2021-07-13 20:42:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12389 to 8439. [2021-07-13 20:42:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 8438 states have (on average 2.9040056885517895) internal successors, (24504), 8438 states have internal predecessors, (24504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 24504 transitions. [2021-07-13 20:42:13,763 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 24504 transitions. Word has length 34 [2021-07-13 20:42:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:13,764 INFO L482 AbstractCegarLoop]: Abstraction has 8439 states and 24504 transitions. [2021-07-13 20:42:13,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-13 20:42:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 24504 transitions. [2021-07-13 20:42:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:13,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:13,775 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:13,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 20:42:13,975 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1794849946, now seen corresponding path program 56 times [2021-07-13 20:42:13,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:13,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900559868] [2021-07-13 20:42:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:14,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:14,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900559868] [2021-07-13 20:42:14,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900559868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:14,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186689779] [2021-07-13 20:42:14,067 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 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 [2021-07-13 20:42:14,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:14,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:14,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:42:14,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:14,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186689779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:14,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:14,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 20:42:14,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467094077] [2021-07-13 20:42:14,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:42:14,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:42:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:14,245 INFO L87 Difference]: Start difference. First operand 8439 states and 24504 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:14,745 INFO L93 Difference]: Finished difference Result 13272 states and 38395 transitions. [2021-07-13 20:42:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:42:14,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:14,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:14,767 INFO L225 Difference]: With dead ends: 13272 [2021-07-13 20:42:14,767 INFO L226 Difference]: Without dead ends: 13198 [2021-07-13 20:42:14,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:42:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13198 states. [2021-07-13 20:42:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13198 to 8873. [2021-07-13 20:42:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8873 states, 8872 states have (on average 2.9063345356176735) internal successors, (25785), 8872 states have internal predecessors, (25785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8873 states to 8873 states and 25785 transitions. [2021-07-13 20:42:14,921 INFO L78 Accepts]: Start accepts. Automaton has 8873 states and 25785 transitions. Word has length 34 [2021-07-13 20:42:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:14,921 INFO L482 AbstractCegarLoop]: Abstraction has 8873 states and 25785 transitions. [2021-07-13 20:42:14,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8873 states and 25785 transitions. [2021-07-13 20:42:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:14,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:14,933 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:15,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:15,141 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:15,141 INFO L82 PathProgramCache]: Analyzing trace with hash 39846686, now seen corresponding path program 57 times [2021-07-13 20:42:15,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:15,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576206302] [2021-07-13 20:42:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:15,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:15,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576206302] [2021-07-13 20:42:15,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576206302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:15,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146366604] [2021-07-13 20:42:15,232 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 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 [2021-07-13 20:42:15,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:42:15,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:15,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:42:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:15,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146366604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:15,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:15,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 20:42:15,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866072465] [2021-07-13 20:42:15,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:15,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:15,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:15,402 INFO L87 Difference]: Start difference. First operand 8873 states and 25785 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) [2021-07-13 20:42:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:15,807 INFO L93 Difference]: Finished difference Result 14096 states and 40972 transitions. [2021-07-13 20:42:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:42:15,808 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 34 [2021-07-13 20:42:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:15,832 INFO L225 Difference]: With dead ends: 14096 [2021-07-13 20:42:15,833 INFO L226 Difference]: Without dead ends: 14006 [2021-07-13 20:42:15,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:42:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14006 states. [2021-07-13 20:42:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14006 to 9649. [2021-07-13 20:42:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9649 states, 9648 states have (on average 2.91386815920398) internal successors, (28113), 9648 states have internal predecessors, (28113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9649 states to 9649 states and 28113 transitions. [2021-07-13 20:42:16,017 INFO L78 Accepts]: Start accepts. Automaton has 9649 states and 28113 transitions. Word has length 34 [2021-07-13 20:42:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:16,017 INFO L482 AbstractCegarLoop]: Abstraction has 9649 states and 28113 transitions. [2021-07-13 20:42:16,017 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) [2021-07-13 20:42:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 9649 states and 28113 transitions. [2021-07-13 20:42:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:16,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:16,030 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:16,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 20:42:16,230 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:16,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:16,230 INFO L82 PathProgramCache]: Analyzing trace with hash -79236326, now seen corresponding path program 58 times [2021-07-13 20:42:16,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:16,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40906222] [2021-07-13 20:42:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:16,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:16,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40906222] [2021-07-13 20:42:16,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40906222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:16,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776955317] [2021-07-13 20:42:16,315 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 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 [2021-07-13 20:42:16,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:16,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:16,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776955317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:16,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:16,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:42:16,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104227231] [2021-07-13 20:42:16,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:16,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:16,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:16,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:16,470 INFO L87 Difference]: Start difference. First operand 9649 states and 28113 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-13 20:42:16,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:16,775 INFO L93 Difference]: Finished difference Result 14018 states and 40804 transitions. [2021-07-13 20:42:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:42:16,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 34 [2021-07-13 20:42:16,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:16,798 INFO L225 Difference]: With dead ends: 14018 [2021-07-13 20:42:16,798 INFO L226 Difference]: Without dead ends: 13916 [2021-07-13 20:42:16,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:42:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13916 states. [2021-07-13 20:42:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13916 to 9263. [2021-07-13 20:42:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 2.9084431008421507) internal successors, (26938), 9262 states have internal predecessors, (26938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 26938 transitions. [2021-07-13 20:42:17,007 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 26938 transitions. Word has length 34 [2021-07-13 20:42:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:17,007 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 26938 transitions. [2021-07-13 20:42:17,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-13 20:42:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 26938 transitions. [2021-07-13 20:42:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:17,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:17,019 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:17,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:17,220 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash -73441712, now seen corresponding path program 59 times [2021-07-13 20:42:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:17,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130883830] [2021-07-13 20:42:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:17,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:17,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130883830] [2021-07-13 20:42:17,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130883830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:17,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399810388] [2021-07-13 20:42:17,332 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 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 [2021-07-13 20:42:17,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:17,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:17,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:17,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:17,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399810388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:17,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:17,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:42:17,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905118319] [2021-07-13 20:42:17,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:17,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:17,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:17,522 INFO L87 Difference]: Start difference. First operand 9263 states and 26938 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-07-13 20:42:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:17,723 INFO L93 Difference]: Finished difference Result 10323 states and 29755 transitions. [2021-07-13 20:42:17,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:17,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 34 [2021-07-13 20:42:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:17,740 INFO L225 Difference]: With dead ends: 10323 [2021-07-13 20:42:17,741 INFO L226 Difference]: Without dead ends: 10249 [2021-07-13 20:42:17,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10249 states. [2021-07-13 20:42:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10249 to 9581. [2021-07-13 20:42:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 2.9115866388308977) internal successors, (27893), 9580 states have internal predecessors, (27893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 27893 transitions. [2021-07-13 20:42:17,875 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 27893 transitions. Word has length 34 [2021-07-13 20:42:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:17,875 INFO L482 AbstractCegarLoop]: Abstraction has 9581 states and 27893 transitions. [2021-07-13 20:42:17,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-07-13 20:42:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 27893 transitions. [2021-07-13 20:42:17,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:17,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:17,887 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:18,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:18,087 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1174536768, now seen corresponding path program 60 times [2021-07-13 20:42:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:18,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235825172] [2021-07-13 20:42:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:18,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:18,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235825172] [2021-07-13 20:42:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235825172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:18,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065453569] [2021-07-13 20:42:18,182 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 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 [2021-07-13 20:42:18,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:18,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065453569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:18,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:18,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:42:18,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60586335] [2021-07-13 20:42:18,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:18,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:18,345 INFO L87 Difference]: Start difference. First operand 9581 states and 27893 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-07-13 20:42:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:18,544 INFO L93 Difference]: Finished difference Result 10737 states and 30998 transitions. [2021-07-13 20:42:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:18,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 34 [2021-07-13 20:42:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:18,595 INFO L225 Difference]: With dead ends: 10737 [2021-07-13 20:42:18,595 INFO L226 Difference]: Without dead ends: 10663 [2021-07-13 20:42:18,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-07-13 20:42:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 9517. [2021-07-13 20:42:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9517 states, 9516 states have (on average 2.9135140815468685) internal successors, (27725), 9516 states have internal predecessors, (27725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9517 states to 9517 states and 27725 transitions. [2021-07-13 20:42:18,711 INFO L78 Accepts]: Start accepts. Automaton has 9517 states and 27725 transitions. Word has length 34 [2021-07-13 20:42:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:18,711 INFO L482 AbstractCegarLoop]: Abstraction has 9517 states and 27725 transitions. [2021-07-13 20:42:18,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-07-13 20:42:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 9517 states and 27725 transitions. [2021-07-13 20:42:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:18,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:18,723 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:18,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:18,923 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:18,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1467187430, now seen corresponding path program 61 times [2021-07-13 20:42:18,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:18,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487527607] [2021-07-13 20:42:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:18,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:18,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487527607] [2021-07-13 20:42:18,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487527607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:18,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615119915] [2021-07-13 20:42:18,997 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:42:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:19,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:19,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:19,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615119915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:19,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:19,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:42:19,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808660366] [2021-07-13 20:42:19,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:19,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:19,152 INFO L87 Difference]: Start difference. First operand 9517 states and 27725 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-07-13 20:42:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:19,374 INFO L93 Difference]: Finished difference Result 11479 states and 33244 transitions. [2021-07-13 20:42:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:42:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 34 [2021-07-13 20:42:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:19,392 INFO L225 Difference]: With dead ends: 11479 [2021-07-13 20:42:19,393 INFO L226 Difference]: Without dead ends: 11389 [2021-07-13 20:42:19,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11389 states. [2021-07-13 20:42:19,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11389 to 10325. [2021-07-13 20:42:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10325 states, 10324 states have (on average 2.9226075164664858) internal successors, (30173), 10324 states have internal predecessors, (30173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10325 states to 10325 states and 30173 transitions. [2021-07-13 20:42:19,543 INFO L78 Accepts]: Start accepts. Automaton has 10325 states and 30173 transitions. Word has length 34 [2021-07-13 20:42:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:19,544 INFO L482 AbstractCegarLoop]: Abstraction has 10325 states and 30173 transitions. [2021-07-13 20:42:19,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-07-13 20:42:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 10325 states and 30173 transitions. [2021-07-13 20:42:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:19,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:19,558 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:19,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:19,758 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:19,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:19,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1348104418, now seen corresponding path program 62 times [2021-07-13 20:42:19,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:19,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428141196] [2021-07-13 20:42:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:42:19,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:19,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428141196] [2021-07-13 20:42:19,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428141196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:19,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843874759] [2021-07-13 20:42:19,832 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 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 [2021-07-13 20:42:19,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:19,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:19,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:19,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:19,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843874759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:19,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:19,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:42:19,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116630265] [2021-07-13 20:42:19,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:19,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:19,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:19,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:19,986 INFO L87 Difference]: Start difference. First operand 10325 states and 30173 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-13 20:42:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:20,224 INFO L93 Difference]: Finished difference Result 11471 states and 33214 transitions. [2021-07-13 20:42:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:42:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 34 [2021-07-13 20:42:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:20,242 INFO L225 Difference]: With dead ends: 11471 [2021-07-13 20:42:20,242 INFO L226 Difference]: Without dead ends: 11355 [2021-07-13 20:42:20,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-07-13 20:42:20,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 10297. [2021-07-13 20:42:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 2.9198717948717947) internal successors, (30063), 10296 states have internal predecessors, (30063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 30063 transitions. [2021-07-13 20:42:20,388 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 30063 transitions. Word has length 34 [2021-07-13 20:42:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:20,388 INFO L482 AbstractCegarLoop]: Abstraction has 10297 states and 30063 transitions. [2021-07-13 20:42:20,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-13 20:42:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 30063 transitions. [2021-07-13 20:42:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:20,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:20,401 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:20,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-13 20:42:20,602 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:20,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1492392000, now seen corresponding path program 63 times [2021-07-13 20:42:20,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:20,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472582467] [2021-07-13 20:42:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:20,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:20,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472582467] [2021-07-13 20:42:20,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472582467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:20,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303778203] [2021-07-13 20:42:20,687 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 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 [2021-07-13 20:42:20,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:20,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:20,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:42:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:20,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303778203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:20,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:20,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:42:20,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390978706] [2021-07-13 20:42:20,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:42:20,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:42:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:20,879 INFO L87 Difference]: Start difference. First operand 10297 states and 30063 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2021-07-13 20:42:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:21,223 INFO L93 Difference]: Finished difference Result 11184 states and 32274 transitions. [2021-07-13 20:42:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:42:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 34 [2021-07-13 20:42:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:21,242 INFO L225 Difference]: With dead ends: 11184 [2021-07-13 20:42:21,242 INFO L226 Difference]: Without dead ends: 11060 [2021-07-13 20:42:21,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:42:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11060 states. [2021-07-13 20:42:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11060 to 9779. [2021-07-13 20:42:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9779 states, 9778 states have (on average 2.916138269584782) internal successors, (28514), 9778 states have internal predecessors, (28514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9779 states to 9779 states and 28514 transitions. [2021-07-13 20:42:21,446 INFO L78 Accepts]: Start accepts. Automaton has 9779 states and 28514 transitions. Word has length 34 [2021-07-13 20:42:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:21,446 INFO L482 AbstractCegarLoop]: Abstraction has 9779 states and 28514 transitions. [2021-07-13 20:42:21,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2021-07-13 20:42:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9779 states and 28514 transitions. [2021-07-13 20:42:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:21,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:21,458 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:21,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 20:42:21,659 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash 821082048, now seen corresponding path program 64 times [2021-07-13 20:42:21,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:21,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655821358] [2021-07-13 20:42:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:21,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:21,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655821358] [2021-07-13 20:42:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655821358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:21,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964542375] [2021-07-13 20:42:21,751 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 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 [2021-07-13 20:42:21,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:21,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:21,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:21,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:21,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964542375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:21,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:21,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:42:21,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962998623] [2021-07-13 20:42:21,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:42:21,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:42:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:21,939 INFO L87 Difference]: Start difference. First operand 9779 states and 28514 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:22,128 INFO L93 Difference]: Finished difference Result 11079 states and 32153 transitions. [2021-07-13 20:42:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:42:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:22,147 INFO L225 Difference]: With dead ends: 11079 [2021-07-13 20:42:22,147 INFO L226 Difference]: Without dead ends: 10985 [2021-07-13 20:42:22,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:42:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10985 states. [2021-07-13 20:42:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10985 to 9971. [2021-07-13 20:42:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9971 states, 9970 states have (on average 2.919558676028084) internal successors, (29108), 9970 states have internal predecessors, (29108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9971 states to 9971 states and 29108 transitions. [2021-07-13 20:42:22,294 INFO L78 Accepts]: Start accepts. Automaton has 9971 states and 29108 transitions. Word has length 34 [2021-07-13 20:42:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:22,294 INFO L482 AbstractCegarLoop]: Abstraction has 9971 states and 29108 transitions. [2021-07-13 20:42:22,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9971 states and 29108 transitions. [2021-07-13 20:42:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:22,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:22,307 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:22,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:42:22,508 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash 380365402, now seen corresponding path program 65 times [2021-07-13 20:42:22,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:22,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250057900] [2021-07-13 20:42:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:22,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250057900] [2021-07-13 20:42:22,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250057900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299636945] [2021-07-13 20:42:22,582 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 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 [2021-07-13 20:42:22,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:22,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:22,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:22,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299636945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:22,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:22,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 20:42:22,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810088877] [2021-07-13 20:42:22,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:42:22,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:42:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:42:22,747 INFO L87 Difference]: Start difference. First operand 9971 states and 29108 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:22,946 INFO L93 Difference]: Finished difference Result 10775 states and 31285 transitions. [2021-07-13 20:42:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:42:22,947 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:22,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:22,966 INFO L225 Difference]: With dead ends: 10775 [2021-07-13 20:42:22,966 INFO L226 Difference]: Without dead ends: 10661 [2021-07-13 20:42:22,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10661 states. [2021-07-13 20:42:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10661 to 8963. [2021-07-13 20:42:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 2.92256192814104) internal successors, (26192), 8962 states have internal predecessors, (26192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 26192 transitions. [2021-07-13 20:42:23,183 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 26192 transitions. Word has length 34 [2021-07-13 20:42:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:23,184 INFO L482 AbstractCegarLoop]: Abstraction has 8963 states and 26192 transitions. [2021-07-13 20:42:23,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 26192 transitions. [2021-07-13 20:42:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:23,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:23,196 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:23,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 20:42:23,397 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2118924544, now seen corresponding path program 66 times [2021-07-13 20:42:23,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:23,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994677287] [2021-07-13 20:42:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:23,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:23,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994677287] [2021-07-13 20:42:23,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994677287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:23,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730358069] [2021-07-13 20:42:23,464 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 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 [2021-07-13 20:42:23,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:23,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:23,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730358069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:23,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:23,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:42:23,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603789551] [2021-07-13 20:42:23,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:23,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:23,679 INFO L87 Difference]: Start difference. First operand 8963 states and 26192 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:23,857 INFO L93 Difference]: Finished difference Result 10683 states and 31168 transitions. [2021-07-13 20:42:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:42:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:23,877 INFO L225 Difference]: With dead ends: 10683 [2021-07-13 20:42:23,878 INFO L226 Difference]: Without dead ends: 10601 [2021-07-13 20:42:23,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:23,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10601 states. [2021-07-13 20:42:24,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10601 to 9899. [2021-07-13 20:42:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9899 states, 9898 states have (on average 2.931501313396646) internal successors, (29016), 9898 states have internal predecessors, (29016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9899 states to 9899 states and 29016 transitions. [2021-07-13 20:42:24,036 INFO L78 Accepts]: Start accepts. Automaton has 9899 states and 29016 transitions. Word has length 34 [2021-07-13 20:42:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:24,036 INFO L482 AbstractCegarLoop]: Abstraction has 9899 states and 29016 transitions. [2021-07-13 20:42:24,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 9899 states and 29016 transitions. [2021-07-13 20:42:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:24,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:24,050 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:24,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:24,251 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1999841532, now seen corresponding path program 67 times [2021-07-13 20:42:24,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:24,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488731740] [2021-07-13 20:42:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:24,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:24,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488731740] [2021-07-13 20:42:24,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488731740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:24,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771360775] [2021-07-13 20:42:24,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:24,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:42:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:24,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771360775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:24,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:24,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:42:24,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169854943] [2021-07-13 20:42:24,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:42:24,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:24,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:42:24,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:42:24,497 INFO L87 Difference]: Start difference. First operand 9899 states and 29016 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:24,684 INFO L93 Difference]: Finished difference Result 10680 states and 31156 transitions. [2021-07-13 20:42:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:42:24,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:24,702 INFO L225 Difference]: With dead ends: 10680 [2021-07-13 20:42:24,702 INFO L226 Difference]: Without dead ends: 10568 [2021-07-13 20:42:24,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:42:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10568 states. [2021-07-13 20:42:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10568 to 8935. [2021-07-13 20:42:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8935 states, 8934 states have (on average 2.9267965077233042) internal successors, (26148), 8934 states have internal predecessors, (26148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 26148 transitions. [2021-07-13 20:42:24,883 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 26148 transitions. Word has length 34 [2021-07-13 20:42:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:24,883 INFO L482 AbstractCegarLoop]: Abstraction has 8935 states and 26148 transitions. [2021-07-13 20:42:24,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 26148 transitions. [2021-07-13 20:42:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:24,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:24,894 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:25,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-13 20:42:25,095 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:25,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2144129114, now seen corresponding path program 68 times [2021-07-13 20:42:25,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:25,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294428436] [2021-07-13 20:42:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:42:25,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:25,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294428436] [2021-07-13 20:42:25,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294428436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:25,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170962132] [2021-07-13 20:42:25,172 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 [2021-07-13 20:42:25,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:25,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:42:25,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:25,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170962132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:25,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:25,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:42:25,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719379128] [2021-07-13 20:42:25,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:42:25,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:42:25,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:25,360 INFO L87 Difference]: Start difference. First operand 8935 states and 26148 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:25,751 INFO L93 Difference]: Finished difference Result 10608 states and 30827 transitions. [2021-07-13 20:42:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:42:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:25,768 INFO L225 Difference]: With dead ends: 10608 [2021-07-13 20:42:25,769 INFO L226 Difference]: Without dead ends: 10484 [2021-07-13 20:42:25,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:42:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10484 states. [2021-07-13 20:42:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10484 to 10195. [2021-07-13 20:42:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10195 states, 10194 states have (on average 2.9315283500098097) internal successors, (29884), 10194 states have internal predecessors, (29884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10195 states to 10195 states and 29884 transitions. [2021-07-13 20:42:25,922 INFO L78 Accepts]: Start accepts. Automaton has 10195 states and 29884 transitions. Word has length 34 [2021-07-13 20:42:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:25,922 INFO L482 AbstractCegarLoop]: Abstraction has 10195 states and 29884 transitions. [2021-07-13 20:42:25,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 10195 states and 29884 transitions. [2021-07-13 20:42:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:42:25,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:25,936 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:26,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:26,137 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:26,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1151402982, now seen corresponding path program 69 times [2021-07-13 20:42:26,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:26,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556027359] [2021-07-13 20:42:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:26,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:26,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556027359] [2021-07-13 20:42:26,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556027359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:26,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468164004] [2021-07-13 20:42:26,243 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 [2021-07-13 20:42:26,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:26,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:26,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:42:26,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:26,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468164004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:26,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:26,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:42:26,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38040657] [2021-07-13 20:42:26,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:42:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:42:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:42:26,452 INFO L87 Difference]: Start difference. First operand 10195 states and 29884 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:26,747 INFO L93 Difference]: Finished difference Result 10519 states and 30598 transitions. [2021-07-13 20:42:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:42:26,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:42:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:26,765 INFO L225 Difference]: With dead ends: 10519 [2021-07-13 20:42:26,765 INFO L226 Difference]: Without dead ends: 10443 [2021-07-13 20:42:26,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:42:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2021-07-13 20:42:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 10179. [2021-07-13 20:42:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10179 states, 10178 states have (on average 2.9320102181175085) internal successors, (29842), 10178 states have internal predecessors, (29842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10179 states to 10179 states and 29842 transitions. [2021-07-13 20:42:26,938 INFO L78 Accepts]: Start accepts. Automaton has 10179 states and 29842 transitions. Word has length 34 [2021-07-13 20:42:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:26,938 INFO L482 AbstractCegarLoop]: Abstraction has 10179 states and 29842 transitions. [2021-07-13 20:42:26,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 10179 states and 29842 transitions. [2021-07-13 20:42:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:26,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:26,952 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:27,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:42:27,152 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1142772374, now seen corresponding path program 70 times [2021-07-13 20:42:27,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:27,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101964083] [2021-07-13 20:42:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:27,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:27,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101964083] [2021-07-13 20:42:27,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101964083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:27,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435382804] [2021-07-13 20:42:27,183 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 [2021-07-13 20:42:27,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:27,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:27,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435382804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:27,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:27,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:27,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893645828] [2021-07-13 20:42:27,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:27,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:27,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:27,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:27,299 INFO L87 Difference]: Start difference. First operand 10179 states and 29842 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:27,641 INFO L93 Difference]: Finished difference Result 12685 states and 36351 transitions. [2021-07-13 20:42:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:27,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:42:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:27,662 INFO L225 Difference]: With dead ends: 12685 [2021-07-13 20:42:27,662 INFO L226 Difference]: Without dead ends: 12685 [2021-07-13 20:42:27,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:42:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12685 states. [2021-07-13 20:42:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12685 to 10409. [2021-07-13 20:42:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10409 states, 10408 states have (on average 2.9320714834742505) internal successors, (30517), 10408 states have internal predecessors, (30517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10409 states to 10409 states and 30517 transitions. [2021-07-13 20:42:27,835 INFO L78 Accepts]: Start accepts. Automaton has 10409 states and 30517 transitions. Word has length 37 [2021-07-13 20:42:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:27,835 INFO L482 AbstractCegarLoop]: Abstraction has 10409 states and 30517 transitions. [2021-07-13 20:42:27,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10409 states and 30517 transitions. [2021-07-13 20:42:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:27,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:27,848 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:28,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:42:28,049 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2120048080, now seen corresponding path program 71 times [2021-07-13 20:42:28,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:28,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334358770] [2021-07-13 20:42:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:28,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:28,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334358770] [2021-07-13 20:42:28,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334358770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522579536] [2021-07-13 20:42:28,079 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 [2021-07-13 20:42:28,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:42:28,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:28,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:28,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522579536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:28,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:28,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:28,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724238533] [2021-07-13 20:42:28,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:28,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:28,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:28,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:28,192 INFO L87 Difference]: Start difference. First operand 10409 states and 30517 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:28,583 INFO L93 Difference]: Finished difference Result 17849 states and 51482 transitions. [2021-07-13 20:42:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:42:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:42:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:28,614 INFO L225 Difference]: With dead ends: 17849 [2021-07-13 20:42:28,614 INFO L226 Difference]: Without dead ends: 17735 [2021-07-13 20:42:28,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:42:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17735 states. [2021-07-13 20:42:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17735 to 11709. [2021-07-13 20:42:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11709 states, 11708 states have (on average 2.949180047830543) internal successors, (34529), 11708 states have internal predecessors, (34529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11709 states to 11709 states and 34529 transitions. [2021-07-13 20:42:28,859 INFO L78 Accepts]: Start accepts. Automaton has 11709 states and 34529 transitions. Word has length 37 [2021-07-13 20:42:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:28,859 INFO L482 AbstractCegarLoop]: Abstraction has 11709 states and 34529 transitions. [2021-07-13 20:42:28,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 11709 states and 34529 transitions. [2021-07-13 20:42:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:28,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:28,874 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:29,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 20:42:29,075 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1923457314, now seen corresponding path program 72 times [2021-07-13 20:42:29,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:29,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612918570] [2021-07-13 20:42:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:29,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:29,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612918570] [2021-07-13 20:42:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612918570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:29,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082493157] [2021-07-13 20:42:29,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:29,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:42:29,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:29,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:29,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082493157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:29,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:29,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 20:42:29,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120726158] [2021-07-13 20:42:29,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:29,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:29,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:29,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:29,222 INFO L87 Difference]: Start difference. First operand 11709 states and 34529 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-07-13 20:42:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:29,651 INFO L93 Difference]: Finished difference Result 21184 states and 60988 transitions. [2021-07-13 20:42:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:42:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-07-13 20:42:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:29,690 INFO L225 Difference]: With dead ends: 21184 [2021-07-13 20:42:29,691 INFO L226 Difference]: Without dead ends: 21177 [2021-07-13 20:42:29,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:42:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21177 states. [2021-07-13 20:42:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21177 to 14606. [2021-07-13 20:42:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 2.9456350564875042) internal successors, (43021), 14605 states have internal predecessors, (43021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 43021 transitions. [2021-07-13 20:42:30,085 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 43021 transitions. Word has length 37 [2021-07-13 20:42:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:30,085 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 43021 transitions. [2021-07-13 20:42:30,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-07-13 20:42:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 43021 transitions. [2021-07-13 20:42:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:30,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:30,105 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:30,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:30,306 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:30,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1994538828, now seen corresponding path program 73 times [2021-07-13 20:42:30,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:30,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116113634] [2021-07-13 20:42:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:30,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116113634] [2021-07-13 20:42:30,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116113634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633310478] [2021-07-13 20:42:30,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:30,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:30,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:30,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633310478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:30,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:30,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 20:42:30,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47859710] [2021-07-13 20:42:30,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:30,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:30,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:30,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:30,454 INFO L87 Difference]: Start difference. First operand 14606 states and 43021 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-07-13 20:42:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:30,749 INFO L93 Difference]: Finished difference Result 15856 states and 46020 transitions. [2021-07-13 20:42:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:42:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-07-13 20:42:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:30,779 INFO L225 Difference]: With dead ends: 15856 [2021-07-13 20:42:30,779 INFO L226 Difference]: Without dead ends: 15842 [2021-07-13 20:42:30,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:42:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15842 states. [2021-07-13 20:42:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15842 to 14446. [2021-07-13 20:42:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14446 states, 14445 states have (on average 2.94932502596054) internal successors, (42603), 14445 states have internal predecessors, (42603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14446 states to 14446 states and 42603 transitions. [2021-07-13 20:42:31,031 INFO L78 Accepts]: Start accepts. Automaton has 14446 states and 42603 transitions. Word has length 37 [2021-07-13 20:42:31,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:31,031 INFO L482 AbstractCegarLoop]: Abstraction has 14446 states and 42603 transitions. [2021-07-13 20:42:31,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-07-13 20:42:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand 14446 states and 42603 transitions. [2021-07-13 20:42:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:31,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:31,051 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:31,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:31,251 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1971300784, now seen corresponding path program 74 times [2021-07-13 20:42:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:31,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652683711] [2021-07-13 20:42:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:31,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:31,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652683711] [2021-07-13 20:42:31,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652683711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:31,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189463422] [2021-07-13 20:42:31,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:31,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:31,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:31,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189463422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:31,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:31,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 20:42:31,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946617686] [2021-07-13 20:42:31,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:31,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:31,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:31,399 INFO L87 Difference]: Start difference. First operand 14446 states and 42603 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:31,795 INFO L93 Difference]: Finished difference Result 19655 states and 57129 transitions. [2021-07-13 20:42:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:42:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:42:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:31,831 INFO L225 Difference]: With dead ends: 19655 [2021-07-13 20:42:31,831 INFO L226 Difference]: Without dead ends: 19625 [2021-07-13 20:42:31,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:42:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19625 states. [2021-07-13 20:42:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19625 to 17272. [2021-07-13 20:42:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17272 states, 17271 states have (on average 2.963927971744543) internal successors, (51190), 17271 states have internal predecessors, (51190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17272 states to 17272 states and 51190 transitions. [2021-07-13 20:42:32,191 INFO L78 Accepts]: Start accepts. Automaton has 17272 states and 51190 transitions. Word has length 37 [2021-07-13 20:42:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:32,192 INFO L482 AbstractCegarLoop]: Abstraction has 17272 states and 51190 transitions. [2021-07-13 20:42:32,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 17272 states and 51190 transitions. [2021-07-13 20:42:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:32,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:32,215 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:32,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:42:32,416 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:32,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:32,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1535121346, now seen corresponding path program 75 times [2021-07-13 20:42:32,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:32,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117837914] [2021-07-13 20:42:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:32,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:32,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117837914] [2021-07-13 20:42:32,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117837914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:32,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660397203] [2021-07-13 20:42:32,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:32,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:32,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:32,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:32,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660397203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:32,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:32,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:32,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970257309] [2021-07-13 20:42:32,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:32,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:32,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:32,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:32,566 INFO L87 Difference]: Start difference. First operand 17272 states and 51190 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-07-13 20:42:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:32,894 INFO L93 Difference]: Finished difference Result 20092 states and 58489 transitions. [2021-07-13 20:42:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:42:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-07-13 20:42:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:32,932 INFO L225 Difference]: With dead ends: 20092 [2021-07-13 20:42:32,932 INFO L226 Difference]: Without dead ends: 20029 [2021-07-13 20:42:32,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:42:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20029 states. [2021-07-13 20:42:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20029 to 17180. [2021-07-13 20:42:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17180 states, 17179 states have (on average 2.957913731881949) internal successors, (50814), 17179 states have internal predecessors, (50814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17180 states to 17180 states and 50814 transitions. [2021-07-13 20:42:33,244 INFO L78 Accepts]: Start accepts. Automaton has 17180 states and 50814 transitions. Word has length 37 [2021-07-13 20:42:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:33,244 INFO L482 AbstractCegarLoop]: Abstraction has 17180 states and 50814 transitions. [2021-07-13 20:42:33,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-07-13 20:42:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 17180 states and 50814 transitions. [2021-07-13 20:42:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:33,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:33,269 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:33,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:33,469 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1028118072, now seen corresponding path program 76 times [2021-07-13 20:42:33,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:33,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575666755] [2021-07-13 20:42:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:42:33,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:33,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575666755] [2021-07-13 20:42:33,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575666755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:33,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975493434] [2021-07-13 20:42:33,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:33,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:33,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:33,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975493434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:33,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:33,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:33,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435377621] [2021-07-13 20:42:33,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:33,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:33,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:33,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:33,655 INFO L87 Difference]: Start difference. First operand 17180 states and 50814 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:34,053 INFO L93 Difference]: Finished difference Result 20914 states and 60232 transitions. [2021-07-13 20:42:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:42:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:42:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:34,092 INFO L225 Difference]: With dead ends: 20914 [2021-07-13 20:42:34,093 INFO L226 Difference]: Without dead ends: 20914 [2021-07-13 20:42:34,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:42:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20914 states. [2021-07-13 20:42:34,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20914 to 17066. [2021-07-13 20:42:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17066 states, 17065 states have (on average 2.9520656314093174) internal successors, (50377), 17065 states have internal predecessors, (50377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17066 states to 17066 states and 50377 transitions. [2021-07-13 20:42:34,403 INFO L78 Accepts]: Start accepts. Automaton has 17066 states and 50377 transitions. Word has length 37 [2021-07-13 20:42:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:34,403 INFO L482 AbstractCegarLoop]: Abstraction has 17066 states and 50377 transitions. [2021-07-13 20:42:34,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17066 states and 50377 transitions. [2021-07-13 20:42:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:34,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:34,426 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:34,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:34,627 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:34,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1338371294, now seen corresponding path program 77 times [2021-07-13 20:42:34,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:34,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570325348] [2021-07-13 20:42:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:42:34,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:34,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570325348] [2021-07-13 20:42:34,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570325348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:34,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331645437] [2021-07-13 20:42:34,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:34,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:42:34,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:34,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331645437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:34,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:34,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:34,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161527736] [2021-07-13 20:42:34,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:34,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:34,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:34,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:34,791 INFO L87 Difference]: Start difference. First operand 17066 states and 50377 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-07-13 20:42:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:35,207 INFO L93 Difference]: Finished difference Result 20100 states and 58146 transitions. [2021-07-13 20:42:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:42:35,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-07-13 20:42:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:35,243 INFO L225 Difference]: With dead ends: 20100 [2021-07-13 20:42:35,243 INFO L226 Difference]: Without dead ends: 20052 [2021-07-13 20:42:35,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:42:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20052 states. [2021-07-13 20:42:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20052 to 17066. [2021-07-13 20:42:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17066 states, 17065 states have (on average 2.9480808672721945) internal successors, (50309), 17065 states have internal predecessors, (50309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17066 states to 17066 states and 50309 transitions. [2021-07-13 20:42:35,629 INFO L78 Accepts]: Start accepts. Automaton has 17066 states and 50309 transitions. Word has length 37 [2021-07-13 20:42:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:35,630 INFO L482 AbstractCegarLoop]: Abstraction has 17066 states and 50309 transitions. [2021-07-13 20:42:35,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-07-13 20:42:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 17066 states and 50309 transitions. [2021-07-13 20:42:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:35,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:35,650 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:35,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:35,850 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash 451443562, now seen corresponding path program 78 times [2021-07-13 20:42:35,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:35,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372030596] [2021-07-13 20:42:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:35,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:35,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372030596] [2021-07-13 20:42:35,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372030596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:35,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240561781] [2021-07-13 20:42:35,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:35,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:42:35,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:35,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:35,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240561781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:35,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:35,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 20:42:35,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517683603] [2021-07-13 20:42:35,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:35,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:35,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:35,982 INFO L87 Difference]: Start difference. First operand 17066 states and 50309 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:36,324 INFO L93 Difference]: Finished difference Result 23441 states and 67906 transitions. [2021-07-13 20:42:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:42:36,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:42:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:36,365 INFO L225 Difference]: With dead ends: 23441 [2021-07-13 20:42:36,366 INFO L226 Difference]: Without dead ends: 23441 [2021-07-13 20:42:36,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=308, Invalid=684, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:42:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23441 states. [2021-07-13 20:42:36,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23441 to 21266. [2021-07-13 20:42:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21266 states, 21265 states have (on average 2.9432870914648483) internal successors, (62589), 21265 states have internal predecessors, (62589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21266 states to 21266 states and 62589 transitions. [2021-07-13 20:42:36,717 INFO L78 Accepts]: Start accepts. Automaton has 21266 states and 62589 transitions. Word has length 37 [2021-07-13 20:42:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:36,717 INFO L482 AbstractCegarLoop]: Abstraction has 21266 states and 62589 transitions. [2021-07-13 20:42:36,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 21266 states and 62589 transitions. [2021-07-13 20:42:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:36,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:36,744 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:36,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:36,953 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash 592527180, now seen corresponding path program 79 times [2021-07-13 20:42:36,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:36,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044311032] [2021-07-13 20:42:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:36,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:36,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044311032] [2021-07-13 20:42:36,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044311032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:36,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523603949] [2021-07-13 20:42:36,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:42:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:37,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:37,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523603949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:37,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:37,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 20:42:37,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802378743] [2021-07-13 20:42:37,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:37,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:37,088 INFO L87 Difference]: Start difference. First operand 21266 states and 62589 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-07-13 20:42:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:37,462 INFO L93 Difference]: Finished difference Result 23280 states and 67487 transitions. [2021-07-13 20:42:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:42:37,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-07-13 20:42:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:37,504 INFO L225 Difference]: With dead ends: 23280 [2021-07-13 20:42:37,504 INFO L226 Difference]: Without dead ends: 23266 [2021-07-13 20:42:37,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:42:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23266 states. [2021-07-13 20:42:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23266 to 21266. [2021-07-13 20:42:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21266 states, 21265 states have (on average 2.9401833999529745) internal successors, (62523), 21265 states have internal predecessors, (62523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21266 states to 21266 states and 62523 transitions. [2021-07-13 20:42:37,938 INFO L78 Accepts]: Start accepts. Automaton has 21266 states and 62523 transitions. Word has length 37 [2021-07-13 20:42:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:37,938 INFO L482 AbstractCegarLoop]: Abstraction has 21266 states and 62523 transitions. [2021-07-13 20:42:37,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-07-13 20:42:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 21266 states and 62523 transitions. [2021-07-13 20:42:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:37,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:37,966 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:38,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 20:42:38,181 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash 676925954, now seen corresponding path program 80 times [2021-07-13 20:42:38,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:38,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55670176] [2021-07-13 20:42:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:42:38,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:38,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55670176] [2021-07-13 20:42:38,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55670176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:38,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082828959] [2021-07-13 20:42:38,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:38,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:38,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:38,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:38,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082828959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:38,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:38,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:42:38,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337727981] [2021-07-13 20:42:38,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:38,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:38,308 INFO L87 Difference]: Start difference. First operand 21266 states and 62523 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-07-13 20:42:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:38,623 INFO L93 Difference]: Finished difference Result 24705 states and 71536 transitions. [2021-07-13 20:42:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-07-13 20:42:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:38,670 INFO L225 Difference]: With dead ends: 24705 [2021-07-13 20:42:38,670 INFO L226 Difference]: Without dead ends: 24649 [2021-07-13 20:42:38,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:42:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24649 states. [2021-07-13 20:42:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24649 to 22536. [2021-07-13 20:42:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22536 states, 22535 states have (on average 2.9332149988906147) internal successors, (66100), 22535 states have internal predecessors, (66100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 66100 transitions. [2021-07-13 20:42:39,070 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 66100 transitions. Word has length 37 [2021-07-13 20:42:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:39,070 INFO L482 AbstractCegarLoop]: Abstraction has 22536 states and 66100 transitions. [2021-07-13 20:42:39,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-07-13 20:42:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 66100 transitions. [2021-07-13 20:42:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:39,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:39,098 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:39,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:42:39,298 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1978003832, now seen corresponding path program 81 times [2021-07-13 20:42:39,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:39,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156651703] [2021-07-13 20:42:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:39,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:39,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156651703] [2021-07-13 20:42:39,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156651703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958051860] [2021-07-13 20:42:39,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:39,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:42:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:39,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:39,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958051860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:39,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:39,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:42:39,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574053920] [2021-07-13 20:42:39,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:42:39,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:39,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:42:39,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:42:39,457 INFO L87 Difference]: Start difference. First operand 22536 states and 66100 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-07-13 20:42:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:39,850 INFO L93 Difference]: Finished difference Result 25861 states and 74940 transitions. [2021-07-13 20:42:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:39,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 37 [2021-07-13 20:42:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:39,898 INFO L225 Difference]: With dead ends: 25861 [2021-07-13 20:42:39,898 INFO L226 Difference]: Without dead ends: 25763 [2021-07-13 20:42:39,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:42:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25763 states. [2021-07-13 20:42:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25763 to 23892. [2021-07-13 20:42:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23892 states, 23891 states have (on average 2.935582436900925) internal successors, (70134), 23891 states have internal predecessors, (70134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23892 states to 23892 states and 70134 transitions. [2021-07-13 20:42:40,301 INFO L78 Accepts]: Start accepts. Automaton has 23892 states and 70134 transitions. Word has length 37 [2021-07-13 20:42:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:40,301 INFO L482 AbstractCegarLoop]: Abstraction has 23892 states and 70134 transitions. [2021-07-13 20:42:40,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-07-13 20:42:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 23892 states and 70134 transitions. [2021-07-13 20:42:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:40,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:40,331 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:40,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:42:40,535 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:40,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash -865916238, now seen corresponding path program 82 times [2021-07-13 20:42:40,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:40,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277661624] [2021-07-13 20:42:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:40,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:40,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277661624] [2021-07-13 20:42:40,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277661624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:40,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134523484] [2021-07-13 20:42:40,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:40,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:40,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:40,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:40,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134523484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:40,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:40,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708473571] [2021-07-13 20:42:40,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:40,720 INFO L87 Difference]: Start difference. First operand 23892 states and 70134 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:41,125 INFO L93 Difference]: Finished difference Result 27875 states and 80321 transitions. [2021-07-13 20:42:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:42:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:42:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:41,178 INFO L225 Difference]: With dead ends: 27875 [2021-07-13 20:42:41,178 INFO L226 Difference]: Without dead ends: 27875 [2021-07-13 20:42:41,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:42:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27875 states. [2021-07-13 20:42:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27875 to 23948. [2021-07-13 20:42:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23948 states, 23947 states have (on average 2.9341462396124776) internal successors, (70264), 23947 states have internal predecessors, (70264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23948 states to 23948 states and 70264 transitions. [2021-07-13 20:42:41,671 INFO L78 Accepts]: Start accepts. Automaton has 23948 states and 70264 transitions. Word has length 37 [2021-07-13 20:42:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:41,671 INFO L482 AbstractCegarLoop]: Abstraction has 23948 states and 70264 transitions. [2021-07-13 20:42:41,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 23948 states and 70264 transitions. [2021-07-13 20:42:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:41,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:41,701 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:41,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:41,901 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:41,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1500573128, now seen corresponding path program 83 times [2021-07-13 20:42:41,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:41,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897085797] [2021-07-13 20:42:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:41,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:41,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897085797] [2021-07-13 20:42:41,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897085797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:41,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248007022] [2021-07-13 20:42:41,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:41,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:42:41,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:41,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:42,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248007022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:42,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:42,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:42,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823693858] [2021-07-13 20:42:42,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:42,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:42,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:42,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:42,031 INFO L87 Difference]: Start difference. First operand 23948 states and 70264 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2021-07-13 20:42:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:42,446 INFO L93 Difference]: Finished difference Result 27736 states and 80333 transitions. [2021-07-13 20:42:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:42:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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 37 [2021-07-13 20:42:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:42,499 INFO L225 Difference]: With dead ends: 27736 [2021-07-13 20:42:42,499 INFO L226 Difference]: Without dead ends: 27682 [2021-07-13 20:42:42,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:42:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27682 states. [2021-07-13 20:42:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27682 to 23344. [2021-07-13 20:42:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23344 states, 23343 states have (on average 2.927044510131517) internal successors, (68326), 23343 states have internal predecessors, (68326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23344 states to 23344 states and 68326 transitions. [2021-07-13 20:42:42,907 INFO L78 Accepts]: Start accepts. Automaton has 23344 states and 68326 transitions. Word has length 37 [2021-07-13 20:42:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:42,908 INFO L482 AbstractCegarLoop]: Abstraction has 23344 states and 68326 transitions. [2021-07-13 20:42:42,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2021-07-13 20:42:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 23344 states and 68326 transitions. [2021-07-13 20:42:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:42,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:42,939 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:43,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-13 20:42:43,140 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:43,140 INFO L82 PathProgramCache]: Analyzing trace with hash 685913988, now seen corresponding path program 84 times [2021-07-13 20:42:43,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:43,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569219923] [2021-07-13 20:42:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:43,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:43,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569219923] [2021-07-13 20:42:43,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569219923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:43,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738122625] [2021-07-13 20:42:43,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:43,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:42:43,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:43,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:43,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738122625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:43,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:43,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:42:43,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406306291] [2021-07-13 20:42:43,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:43,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:43,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:43,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:43,281 INFO L87 Difference]: Start difference. First operand 23344 states and 68326 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-07-13 20:42:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:43,871 INFO L93 Difference]: Finished difference Result 29936 states and 86164 transitions. [2021-07-13 20:42:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:42:43,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 37 [2021-07-13 20:42:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:43,926 INFO L225 Difference]: With dead ends: 29936 [2021-07-13 20:42:43,926 INFO L226 Difference]: Without dead ends: 29929 [2021-07-13 20:42:43,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:42:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29929 states. [2021-07-13 20:42:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29929 to 24778. [2021-07-13 20:42:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24778 states, 24777 states have (on average 2.9320337409694477) internal successors, (72647), 24777 states have internal predecessors, (72647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24778 states to 24778 states and 72647 transitions. [2021-07-13 20:42:44,389 INFO L78 Accepts]: Start accepts. Automaton has 24778 states and 72647 transitions. Word has length 37 [2021-07-13 20:42:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:44,389 INFO L482 AbstractCegarLoop]: Abstraction has 24778 states and 72647 transitions. [2021-07-13 20:42:44,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-07-13 20:42:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 24778 states and 72647 transitions. [2021-07-13 20:42:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:44,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:44,420 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:44,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 20:42:44,621 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash 308942834, now seen corresponding path program 85 times [2021-07-13 20:42:44,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:44,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554262425] [2021-07-13 20:42:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:44,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554262425] [2021-07-13 20:42:44,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554262425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928622035] [2021-07-13 20:42:44,646 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 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 [2021-07-13 20:42:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:44,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:44,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928622035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:44,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:44,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:42:44,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841513919] [2021-07-13 20:42:44,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:44,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:44,755 INFO L87 Difference]: Start difference. First operand 24778 states and 72647 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-07-13 20:42:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:45,084 INFO L93 Difference]: Finished difference Result 27753 states and 80201 transitions. [2021-07-13 20:42:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 37 [2021-07-13 20:42:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:45,141 INFO L225 Difference]: With dead ends: 27753 [2021-07-13 20:42:45,141 INFO L226 Difference]: Without dead ends: 27732 [2021-07-13 20:42:45,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=222, Invalid=648, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:42:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27732 states. [2021-07-13 20:42:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27732 to 24300. [2021-07-13 20:42:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24300 states, 24299 states have (on average 2.930490966706449) internal successors, (71208), 24299 states have internal predecessors, (71208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24300 states to 24300 states and 71208 transitions. [2021-07-13 20:42:45,679 INFO L78 Accepts]: Start accepts. Automaton has 24300 states and 71208 transitions. Word has length 37 [2021-07-13 20:42:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:45,679 INFO L482 AbstractCegarLoop]: Abstraction has 24300 states and 71208 transitions. [2021-07-13 20:42:45,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-07-13 20:42:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 24300 states and 71208 transitions. [2021-07-13 20:42:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:45,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:45,709 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:45,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:45,909 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:45,910 INFO L82 PathProgramCache]: Analyzing trace with hash 258861524, now seen corresponding path program 86 times [2021-07-13 20:42:45,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:45,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157847020] [2021-07-13 20:42:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:45,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:45,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157847020] [2021-07-13 20:42:45,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157847020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:45,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347884178] [2021-07-13 20:42:45,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:45,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:45,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:46,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347884178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:46,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:46,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:42:46,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386343839] [2021-07-13 20:42:46,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:46,039 INFO L87 Difference]: Start difference. First operand 24300 states and 71208 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-07-13 20:42:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:46,354 INFO L93 Difference]: Finished difference Result 28646 states and 82626 transitions. [2021-07-13 20:42:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:42:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 37 [2021-07-13 20:42:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:46,409 INFO L225 Difference]: With dead ends: 28646 [2021-07-13 20:42:46,409 INFO L226 Difference]: Without dead ends: 28590 [2021-07-13 20:42:46,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:42:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28590 states. [2021-07-13 20:42:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28590 to 24644. [2021-07-13 20:42:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24644 states, 24643 states have (on average 2.9266728888528184) internal successors, (72122), 24643 states have internal predecessors, (72122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24644 states to 24644 states and 72122 transitions. [2021-07-13 20:42:46,868 INFO L78 Accepts]: Start accepts. Automaton has 24644 states and 72122 transitions. Word has length 37 [2021-07-13 20:42:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:46,868 INFO L482 AbstractCegarLoop]: Abstraction has 24644 states and 72122 transitions. [2021-07-13 20:42:46,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-07-13 20:42:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 24644 states and 72122 transitions. [2021-07-13 20:42:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:46,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:46,897 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:47,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:47,098 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash 613645396, now seen corresponding path program 87 times [2021-07-13 20:42:47,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:47,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059482098] [2021-07-13 20:42:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:42:47,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:47,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059482098] [2021-07-13 20:42:47,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059482098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:47,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758994450] [2021-07-13 20:42:47,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:47,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:42:47,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:47,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:47,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758994450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:47,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:47,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:42:47,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317351245] [2021-07-13 20:42:47,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:47,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:47,245 INFO L87 Difference]: Start difference. First operand 24644 states and 72122 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:47,772 INFO L93 Difference]: Finished difference Result 30237 states and 87214 transitions. [2021-07-13 20:42:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:42:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:42:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:47,833 INFO L225 Difference]: With dead ends: 30237 [2021-07-13 20:42:47,833 INFO L226 Difference]: Without dead ends: 30237 [2021-07-13 20:42:47,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:42:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30237 states. [2021-07-13 20:42:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30237 to 26462. [2021-07-13 20:42:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26462 states, 26461 states have (on average 2.9321265258304674) internal successors, (77587), 26461 states have internal predecessors, (77587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26462 states to 26462 states and 77587 transitions. [2021-07-13 20:42:48,319 INFO L78 Accepts]: Start accepts. Automaton has 26462 states and 77587 transitions. Word has length 37 [2021-07-13 20:42:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:48,319 INFO L482 AbstractCegarLoop]: Abstraction has 26462 states and 77587 transitions. [2021-07-13 20:42:48,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26462 states and 77587 transitions. [2021-07-13 20:42:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:48,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:48,352 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:48,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:48,552 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:48,553 INFO L82 PathProgramCache]: Analyzing trace with hash 402948350, now seen corresponding path program 88 times [2021-07-13 20:42:48,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:48,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029983944] [2021-07-13 20:42:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:42:48,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:48,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029983944] [2021-07-13 20:42:48,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029983944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:48,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35639386] [2021-07-13 20:42:48,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:48,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:48,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:48,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:48,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:48,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35639386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:48,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:48,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:42:48,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095220731] [2021-07-13 20:42:48,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:48,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:48,679 INFO L87 Difference]: Start difference. First operand 26462 states and 77587 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-07-13 20:42:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:49,058 INFO L93 Difference]: Finished difference Result 29627 states and 86019 transitions. [2021-07-13 20:42:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:42:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 37 [2021-07-13 20:42:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:49,115 INFO L225 Difference]: With dead ends: 29627 [2021-07-13 20:42:49,115 INFO L226 Difference]: Without dead ends: 29615 [2021-07-13 20:42:49,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:42:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29615 states. [2021-07-13 20:42:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29615 to 27386. [2021-07-13 20:42:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27386 states, 27385 states have (on average 2.9343436187693994) internal successors, (80357), 27385 states have internal predecessors, (80357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27386 states to 27386 states and 80357 transitions. [2021-07-13 20:42:49,735 INFO L78 Accepts]: Start accepts. Automaton has 27386 states and 80357 transitions. Word has length 37 [2021-07-13 20:42:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:49,735 INFO L482 AbstractCegarLoop]: Abstraction has 27386 states and 80357 transitions. [2021-07-13 20:42:49,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-07-13 20:42:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27386 states and 80357 transitions. [2021-07-13 20:42:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:49,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:49,774 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:49,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-07-13 20:42:49,982 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash 754729014, now seen corresponding path program 89 times [2021-07-13 20:42:49,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:49,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543528552] [2021-07-13 20:42:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:42:50,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:50,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543528552] [2021-07-13 20:42:50,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543528552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:50,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250242730] [2021-07-13 20:42:50,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:50,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:50,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:50,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:50,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250242730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:50,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:50,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:42:50,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538343206] [2021-07-13 20:42:50,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:50,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:50,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:50,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:50,123 INFO L87 Difference]: Start difference. First operand 27386 states and 80357 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-07-13 20:42:50,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:50,501 INFO L93 Difference]: Finished difference Result 30942 states and 89428 transitions. [2021-07-13 20:42:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:50,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-07-13 20:42:50,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:50,560 INFO L225 Difference]: With dead ends: 30942 [2021-07-13 20:42:50,560 INFO L226 Difference]: Without dead ends: 30928 [2021-07-13 20:42:50,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:42:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30928 states. [2021-07-13 20:42:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30928 to 26470. [2021-07-13 20:42:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26470 states, 26469 states have (on average 2.926782273603083) internal successors, (77469), 26469 states have internal predecessors, (77469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26470 states to 26470 states and 77469 transitions. [2021-07-13 20:42:51,043 INFO L78 Accepts]: Start accepts. Automaton has 26470 states and 77469 transitions. Word has length 37 [2021-07-13 20:42:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:51,043 INFO L482 AbstractCegarLoop]: Abstraction has 26470 states and 77469 transitions. [2021-07-13 20:42:51,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-07-13 20:42:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 26470 states and 77469 transitions. [2021-07-13 20:42:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:51,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:51,074 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:51,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 20:42:51,276 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:51,276 INFO L82 PathProgramCache]: Analyzing trace with hash 839127788, now seen corresponding path program 90 times [2021-07-13 20:42:51,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:51,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437540813] [2021-07-13 20:42:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:42:51,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:51,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437540813] [2021-07-13 20:42:51,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437540813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290497519] [2021-07-13 20:42:51,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:42:51,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:42:51,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:51,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:51,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290497519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:51,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:51,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:42:51,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059630203] [2021-07-13 20:42:51,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:51,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:51,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:51,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:51,411 INFO L87 Difference]: Start difference. First operand 26470 states and 77469 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-07-13 20:42:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:51,769 INFO L93 Difference]: Finished difference Result 35038 states and 101252 transitions. [2021-07-13 20:42:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:42:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-07-13 20:42:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:51,839 INFO L225 Difference]: With dead ends: 35038 [2021-07-13 20:42:51,839 INFO L226 Difference]: Without dead ends: 34982 [2021-07-13 20:42:51,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:42:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34982 states. [2021-07-13 20:42:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34982 to 26896. [2021-07-13 20:42:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26896 states, 26895 states have (on average 2.923814835471277) internal successors, (78636), 26895 states have internal predecessors, (78636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26896 states to 26896 states and 78636 transitions. [2021-07-13 20:42:52,438 INFO L78 Accepts]: Start accepts. Automaton has 26896 states and 78636 transitions. Word has length 37 [2021-07-13 20:42:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:52,438 INFO L482 AbstractCegarLoop]: Abstraction has 26896 states and 78636 transitions. [2021-07-13 20:42:52,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-07-13 20:42:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 26896 states and 78636 transitions. [2021-07-13 20:42:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:52,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:52,470 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:52,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 20:42:52,671 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:52,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1815801998, now seen corresponding path program 91 times [2021-07-13 20:42:52,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:52,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900265301] [2021-07-13 20:42:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:52,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:52,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900265301] [2021-07-13 20:42:52,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900265301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:52,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155542875] [2021-07-13 20:42:52,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:52,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155542875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:52,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:52,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:42:52,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557909498] [2021-07-13 20:42:52,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:42:52,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:42:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:42:52,808 INFO L87 Difference]: Start difference. First operand 26896 states and 78636 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2021-07-13 20:42:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:53,139 INFO L93 Difference]: Finished difference Result 34762 states and 100280 transitions. [2021-07-13 20:42:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:42:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 37 [2021-07-13 20:42:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:53,207 INFO L225 Difference]: With dead ends: 34762 [2021-07-13 20:42:53,207 INFO L226 Difference]: Without dead ends: 34664 [2021-07-13 20:42:53,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:42:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34664 states. [2021-07-13 20:42:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34664 to 28630. [2021-07-13 20:42:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28630 states, 28629 states have (on average 2.9249711830661216) internal successors, (83739), 28629 states have internal predecessors, (83739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28630 states to 28630 states and 83739 transitions. [2021-07-13 20:42:53,952 INFO L78 Accepts]: Start accepts. Automaton has 28630 states and 83739 transitions. Word has length 37 [2021-07-13 20:42:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:53,952 INFO L482 AbstractCegarLoop]: Abstraction has 28630 states and 83739 transitions. [2021-07-13 20:42:53,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2021-07-13 20:42:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 28630 states and 83739 transitions. [2021-07-13 20:42:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:54,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:54,006 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:54,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 20:42:54,206 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash 930686374, now seen corresponding path program 92 times [2021-07-13 20:42:54,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:54,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848571336] [2021-07-13 20:42:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:54,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:54,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848571336] [2021-07-13 20:42:54,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848571336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:54,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968561805] [2021-07-13 20:42:54,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:54,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:42:54,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:54,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:54,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968561805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:54,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:54,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:42:54,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291468140] [2021-07-13 20:42:54,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:54,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:54,480 INFO L87 Difference]: Start difference. First operand 28630 states and 83739 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-07-13 20:42:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:55,110 INFO L93 Difference]: Finished difference Result 36830 states and 106101 transitions. [2021-07-13 20:42:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:42:55,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-07-13 20:42:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:55,181 INFO L225 Difference]: With dead ends: 36830 [2021-07-13 20:42:55,182 INFO L226 Difference]: Without dead ends: 36830 [2021-07-13 20:42:55,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:42:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36830 states. [2021-07-13 20:42:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36830 to 29087. [2021-07-13 20:42:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29087 states, 29086 states have (on average 2.927009557862889) internal successors, (85135), 29086 states have internal predecessors, (85135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29087 states to 29087 states and 85135 transitions. [2021-07-13 20:42:55,828 INFO L78 Accepts]: Start accepts. Automaton has 29087 states and 85135 transitions. Word has length 37 [2021-07-13 20:42:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:55,828 INFO L482 AbstractCegarLoop]: Abstraction has 29087 states and 85135 transitions. [2021-07-13 20:42:55,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-07-13 20:42:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 29087 states and 85135 transitions. [2021-07-13 20:42:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:55,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:55,947 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:56,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 20:42:56,147 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:56,148 INFO L82 PathProgramCache]: Analyzing trace with hash 719989328, now seen corresponding path program 93 times [2021-07-13 20:42:56,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:56,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189302947] [2021-07-13 20:42:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:56,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:56,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189302947] [2021-07-13 20:42:56,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189302947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:56,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863552368] [2021-07-13 20:42:56,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:56,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:42:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:56,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:56,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863552368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:56,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:56,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:42:56,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986648104] [2021-07-13 20:42:56,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:56,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:56,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:56,269 INFO L87 Difference]: Start difference. First operand 29087 states and 85135 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-07-13 20:42:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:56,674 INFO L93 Difference]: Finished difference Result 32333 states and 93601 transitions. [2021-07-13 20:42:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:42:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-07-13 20:42:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:56,802 INFO L225 Difference]: With dead ends: 32333 [2021-07-13 20:42:56,803 INFO L226 Difference]: Without dead ends: 32321 [2021-07-13 20:42:56,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=389, Invalid=733, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:42:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32321 states. [2021-07-13 20:42:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32321 to 28821. [2021-07-13 20:42:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28821 states, 28820 states have (on average 2.9254684247050657) internal successors, (84312), 28820 states have internal predecessors, (84312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28821 states to 28821 states and 84312 transitions. [2021-07-13 20:42:57,323 INFO L78 Accepts]: Start accepts. Automaton has 28821 states and 84312 transitions. Word has length 37 [2021-07-13 20:42:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:57,323 INFO L482 AbstractCegarLoop]: Abstraction has 28821 states and 84312 transitions. [2021-07-13 20:42:57,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-07-13 20:42:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 28821 states and 84312 transitions. [2021-07-13 20:42:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:57,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:57,362 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:57,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-13 20:42:57,564 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:57,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1448741146, now seen corresponding path program 94 times [2021-07-13 20:42:57,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:57,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328296108] [2021-07-13 20:42:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:57,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:57,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328296108] [2021-07-13 20:42:57,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328296108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:57,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597729999] [2021-07-13 20:42:57,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:57,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:42:57,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:57,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597729999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:57,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:57,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:42:57,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155561271] [2021-07-13 20:42:57,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:57,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:57,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:57,689 INFO L87 Difference]: Start difference. First operand 28821 states and 84312 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:42:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:58,398 INFO L93 Difference]: Finished difference Result 33430 states and 96240 transitions. [2021-07-13 20:42:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:42:58,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-13 20:42:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:58,471 INFO L225 Difference]: With dead ends: 33430 [2021-07-13 20:42:58,471 INFO L226 Difference]: Without dead ends: 33423 [2021-07-13 20:42:58,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:42:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33423 states. [2021-07-13 20:42:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33423 to 29449. [2021-07-13 20:42:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29449 states, 29448 states have (on average 2.9228470524314045) internal successors, (86072), 29448 states have internal predecessors, (86072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:42:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29449 states to 29449 states and 86072 transitions. [2021-07-13 20:42:59,175 INFO L78 Accepts]: Start accepts. Automaton has 29449 states and 86072 transitions. Word has length 37 [2021-07-13 20:42:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:42:59,175 INFO L482 AbstractCegarLoop]: Abstraction has 29449 states and 86072 transitions. [2021-07-13 20:42:59,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:42:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 29449 states and 86072 transitions. [2021-07-13 20:42:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:42:59,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:42:59,211 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:42:59,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 20:42:59,416 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:42:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:42:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1071769992, now seen corresponding path program 95 times [2021-07-13 20:42:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:42:59,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314032597] [2021-07-13 20:42:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:42:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:42:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:59,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:42:59,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314032597] [2021-07-13 20:42:59,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314032597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:59,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583769663] [2021-07-13 20:42:59,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:59,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:42:59,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:42:59,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:42:59,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:42:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:42:59,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583769663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:42:59,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:42:59,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:42:59,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210066703] [2021-07-13 20:42:59,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:42:59,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:42:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:42:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:42:59,545 INFO L87 Difference]: Start difference. First operand 29449 states and 86072 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:00,052 INFO L93 Difference]: Finished difference Result 36836 states and 106178 transitions. [2021-07-13 20:43:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:43:00,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-13 20:43:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:00,122 INFO L225 Difference]: With dead ends: 36836 [2021-07-13 20:43:00,123 INFO L226 Difference]: Without dead ends: 36822 [2021-07-13 20:43:00,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:43:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36822 states. [2021-07-13 20:43:00,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36822 to 29007. [2021-07-13 20:43:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29007 states, 29006 states have (on average 2.9205336826863406) internal successors, (84713), 29006 states have internal predecessors, (84713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29007 states to 29007 states and 84713 transitions. [2021-07-13 20:43:00,822 INFO L78 Accepts]: Start accepts. Automaton has 29007 states and 84713 transitions. Word has length 37 [2021-07-13 20:43:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:00,822 INFO L482 AbstractCegarLoop]: Abstraction has 29007 states and 84713 transitions. [2021-07-13 20:43:00,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 29007 states and 84713 transitions. [2021-07-13 20:43:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:00,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:00,863 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:01,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:01,063 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:01,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1156168766, now seen corresponding path program 96 times [2021-07-13 20:43:01,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:01,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552139338] [2021-07-13 20:43:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552139338] [2021-07-13 20:43:01,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552139338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187071227] [2021-07-13 20:43:01,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:01,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:43:01,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:01,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:01,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187071227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:01,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:01,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493264093] [2021-07-13 20:43:01,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:01,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:01,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:01,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:01,301 INFO L87 Difference]: Start difference. First operand 29007 states and 84713 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:01,781 INFO L93 Difference]: Finished difference Result 41031 states and 118463 transitions. [2021-07-13 20:43:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:43:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-13 20:43:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:01,857 INFO L225 Difference]: With dead ends: 41031 [2021-07-13 20:43:01,857 INFO L226 Difference]: Without dead ends: 40975 [2021-07-13 20:43:01,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:43:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40975 states. [2021-07-13 20:43:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40975 to 29017. [2021-07-13 20:43:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29017 states, 29016 states have (on average 2.9198373311276535) internal successors, (84722), 29016 states have internal predecessors, (84722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29017 states to 29017 states and 84722 transitions. [2021-07-13 20:43:02,467 INFO L78 Accepts]: Start accepts. Automaton has 29017 states and 84722 transitions. Word has length 37 [2021-07-13 20:43:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:02,468 INFO L482 AbstractCegarLoop]: Abstraction has 29017 states and 84722 transitions. [2021-07-13 20:43:02,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 29017 states and 84722 transitions. [2021-07-13 20:43:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:02,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:02,506 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:02,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:02,707 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1498761020, now seen corresponding path program 97 times [2021-07-13 20:43:02,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:02,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828426758] [2021-07-13 20:43:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:02,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:02,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828426758] [2021-07-13 20:43:02,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828426758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:02,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189921633] [2021-07-13 20:43:02,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:02,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:02,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:02,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189921633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:02,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:02,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:02,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096279727] [2021-07-13 20:43:02,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:02,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:02,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:02,836 INFO L87 Difference]: Start difference. First operand 29017 states and 84722 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:03,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:03,280 INFO L93 Difference]: Finished difference Result 35489 states and 102692 transitions. [2021-07-13 20:43:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:43:03,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-13 20:43:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:03,363 INFO L225 Difference]: With dead ends: 35489 [2021-07-13 20:43:03,363 INFO L226 Difference]: Without dead ends: 35440 [2021-07-13 20:43:03,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:43:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35440 states. [2021-07-13 20:43:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35440 to 29017. [2021-07-13 20:43:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29017 states, 29016 states have (on average 2.9190102012682657) internal successors, (84698), 29016 states have internal predecessors, (84698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29017 states to 29017 states and 84698 transitions. [2021-07-13 20:43:04,190 INFO L78 Accepts]: Start accepts. Automaton has 29017 states and 84698 transitions. Word has length 37 [2021-07-13 20:43:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:04,190 INFO L482 AbstractCegarLoop]: Abstraction has 29017 states and 84698 transitions. [2021-07-13 20:43:04,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 29017 states and 84698 transitions. [2021-07-13 20:43:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:04,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:04,231 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:04,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:04,433 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1139106120, now seen corresponding path program 98 times [2021-07-13 20:43:04,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:04,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437173153] [2021-07-13 20:43:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:04,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:04,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437173153] [2021-07-13 20:43:04,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437173153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670863908] [2021-07-13 20:43:04,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:04,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:04,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670863908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:04,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:04,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:04,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790705610] [2021-07-13 20:43:04,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:04,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:04,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:04,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:04,546 INFO L87 Difference]: Start difference. First operand 29017 states and 84698 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-13 20:43:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:04,792 INFO L93 Difference]: Finished difference Result 32744 states and 95315 transitions. [2021-07-13 20:43:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:43:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-07-13 20:43:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:04,869 INFO L225 Difference]: With dead ends: 32744 [2021-07-13 20:43:04,869 INFO L226 Difference]: Without dead ends: 32737 [2021-07-13 20:43:04,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:05,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32737 states. [2021-07-13 20:43:05,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32737 to 28808. [2021-07-13 20:43:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28808 states, 28807 states have (on average 2.919602874301385) internal successors, (84105), 28807 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28808 states to 28808 states and 84105 transitions. [2021-07-13 20:43:05,577 INFO L78 Accepts]: Start accepts. Automaton has 28808 states and 84105 transitions. Word has length 37 [2021-07-13 20:43:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:05,577 INFO L482 AbstractCegarLoop]: Abstraction has 28808 states and 84105 transitions. [2021-07-13 20:43:05,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-13 20:43:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 28808 states and 84105 transitions. [2021-07-13 20:43:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:05,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:05,619 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:05,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:05,820 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:05,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:05,820 INFO L82 PathProgramCache]: Analyzing trace with hash -658181484, now seen corresponding path program 99 times [2021-07-13 20:43:05,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:05,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989129472] [2021-07-13 20:43:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:05,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989129472] [2021-07-13 20:43:05,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989129472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525425733] [2021-07-13 20:43:05,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:05,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:05,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:05,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:05,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:05,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525425733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:05,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:05,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064372252] [2021-07-13 20:43:05,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:05,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:05,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:05,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:05,947 INFO L87 Difference]: Start difference. First operand 28808 states and 84105 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-13 20:43:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:06,179 INFO L93 Difference]: Finished difference Result 34783 states and 100971 transitions. [2021-07-13 20:43:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:43:06,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-07-13 20:43:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:06,255 INFO L225 Difference]: With dead ends: 34783 [2021-07-13 20:43:06,256 INFO L226 Difference]: Without dead ends: 34717 [2021-07-13 20:43:06,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34717 states. [2021-07-13 20:43:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34717 to 28808. [2021-07-13 20:43:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28808 states, 28807 states have (on average 2.9192210226681015) internal successors, (84094), 28807 states have internal predecessors, (84094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28808 states to 28808 states and 84094 transitions. [2021-07-13 20:43:06,986 INFO L78 Accepts]: Start accepts. Automaton has 28808 states and 84094 transitions. Word has length 37 [2021-07-13 20:43:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:06,986 INFO L482 AbstractCegarLoop]: Abstraction has 28808 states and 84094 transitions. [2021-07-13 20:43:06,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-13 20:43:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 28808 states and 84094 transitions. [2021-07-13 20:43:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:07,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:07,027 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:07,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:07,227 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:07,228 INFO L82 PathProgramCache]: Analyzing trace with hash -137360910, now seen corresponding path program 100 times [2021-07-13 20:43:07,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:07,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611637569] [2021-07-13 20:43:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:07,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:07,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611637569] [2021-07-13 20:43:07,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611637569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:07,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321623153] [2021-07-13 20:43:07,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:07,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:07,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:07,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321623153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:07,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:07,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:07,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150085755] [2021-07-13 20:43:07,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:07,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:07,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:07,343 INFO L87 Difference]: Start difference. First operand 28808 states and 84094 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-13 20:43:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:07,579 INFO L93 Difference]: Finished difference Result 32159 states and 93482 transitions. [2021-07-13 20:43:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:43:07,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-07-13 20:43:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:07,775 INFO L225 Difference]: With dead ends: 32159 [2021-07-13 20:43:07,775 INFO L226 Difference]: Without dead ends: 32159 [2021-07-13 20:43:07,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32159 states. [2021-07-13 20:43:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32159 to 29022. [2021-07-13 20:43:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29022 states, 29021 states have (on average 2.918817408083801) internal successors, (84707), 29021 states have internal predecessors, (84707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29022 states to 29022 states and 84707 transitions. [2021-07-13 20:43:08,341 INFO L78 Accepts]: Start accepts. Automaton has 29022 states and 84707 transitions. Word has length 37 [2021-07-13 20:43:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:08,341 INFO L482 AbstractCegarLoop]: Abstraction has 29022 states and 84707 transitions. [2021-07-13 20:43:08,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-13 20:43:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 29022 states and 84707 transitions. [2021-07-13 20:43:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:08,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:08,382 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:08,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 20:43:08,583 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1394759394, now seen corresponding path program 101 times [2021-07-13 20:43:08,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:08,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189299764] [2021-07-13 20:43:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:08,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:08,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189299764] [2021-07-13 20:43:08,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189299764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:08,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127250451] [2021-07-13 20:43:08,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:08,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127250451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:08,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:43:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565390759] [2021-07-13 20:43:08,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:43:08,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:08,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:43:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:43:08,723 INFO L87 Difference]: Start difference. First operand 29022 states and 84707 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-13 20:43:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:09,064 INFO L93 Difference]: Finished difference Result 34766 states and 100469 transitions. [2021-07-13 20:43:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:43:09,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-07-13 20:43:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:09,156 INFO L225 Difference]: With dead ends: 34766 [2021-07-13 20:43:09,156 INFO L226 Difference]: Without dead ends: 34712 [2021-07-13 20:43:09,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34712 states. [2021-07-13 20:43:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34712 to 29022. [2021-07-13 20:43:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29022 states, 29021 states have (on average 2.918541745632473) internal successors, (84699), 29021 states have internal predecessors, (84699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29022 states to 29022 states and 84699 transitions. [2021-07-13 20:43:09,747 INFO L78 Accepts]: Start accepts. Automaton has 29022 states and 84699 transitions. Word has length 37 [2021-07-13 20:43:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:09,748 INFO L482 AbstractCegarLoop]: Abstraction has 29022 states and 84699 transitions. [2021-07-13 20:43:09,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-13 20:43:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 29022 states and 84699 transitions. [2021-07-13 20:43:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:09,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:09,789 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:09,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 20:43:09,990 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:09,990 INFO L82 PathProgramCache]: Analyzing trace with hash -176149936, now seen corresponding path program 102 times [2021-07-13 20:43:09,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:09,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133333854] [2021-07-13 20:43:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:10,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:10,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133333854] [2021-07-13 20:43:10,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133333854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:10,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693803312] [2021-07-13 20:43:10,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:10,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:10,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693803312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:10,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:10,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:10,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878258914] [2021-07-13 20:43:10,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:10,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:10,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:10,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:10,114 INFO L87 Difference]: Start difference. First operand 29022 states and 84699 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-07-13 20:43:10,421 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:43:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:10,536 INFO L93 Difference]: Finished difference Result 31470 states and 91225 transitions. [2021-07-13 20:43:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:43:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-07-13 20:43:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:10,601 INFO L225 Difference]: With dead ends: 31470 [2021-07-13 20:43:10,601 INFO L226 Difference]: Without dead ends: 31470 [2021-07-13 20:43:10,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:43:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31470 states. [2021-07-13 20:43:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31470 to 29312. [2021-07-13 20:43:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29312 states, 29311 states have (on average 2.917744191600423) internal successors, (85522), 29311 states have internal predecessors, (85522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29312 states to 29312 states and 85522 transitions. [2021-07-13 20:43:11,252 INFO L78 Accepts]: Start accepts. Automaton has 29312 states and 85522 transitions. Word has length 37 [2021-07-13 20:43:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:11,252 INFO L482 AbstractCegarLoop]: Abstraction has 29312 states and 85522 transitions. [2021-07-13 20:43:11,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-07-13 20:43:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 29312 states and 85522 transitions. [2021-07-13 20:43:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:11,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:11,295 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:11,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 20:43:11,496 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1979611270, now seen corresponding path program 103 times [2021-07-13 20:43:11,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:11,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803255723] [2021-07-13 20:43:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:11,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:11,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803255723] [2021-07-13 20:43:11,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803255723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:11,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961088998] [2021-07-13 20:43:11,536 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 [2021-07-13 20:43:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:11,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:11,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961088998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:11,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:11,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389065516] [2021-07-13 20:43:11,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:11,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:11,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:11,645 INFO L87 Difference]: Start difference. First operand 29312 states and 85522 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-07-13 20:43:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:12,087 INFO L93 Difference]: Finished difference Result 35663 states and 102618 transitions. [2021-07-13 20:43:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:43:12,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-07-13 20:43:12,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:12,155 INFO L225 Difference]: With dead ends: 35663 [2021-07-13 20:43:12,156 INFO L226 Difference]: Without dead ends: 35621 [2021-07-13 20:43:12,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:43:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35621 states. [2021-07-13 20:43:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35621 to 30052. [2021-07-13 20:43:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30052 states, 30051 states have (on average 2.922365312302419) internal successors, (87820), 30051 states have internal predecessors, (87820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30052 states to 30052 states and 87820 transitions. [2021-07-13 20:43:12,852 INFO L78 Accepts]: Start accepts. Automaton has 30052 states and 87820 transitions. Word has length 37 [2021-07-13 20:43:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:12,852 INFO L482 AbstractCegarLoop]: Abstraction has 30052 states and 87820 transitions. [2021-07-13 20:43:12,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-07-13 20:43:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 30052 states and 87820 transitions. [2021-07-13 20:43:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:12,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:12,891 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:13,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:13,091 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2112887858, now seen corresponding path program 104 times [2021-07-13 20:43:13,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:13,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400225657] [2021-07-13 20:43:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:13,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:13,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400225657] [2021-07-13 20:43:13,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400225657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:13,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189265352] [2021-07-13 20:43:13,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:13,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:13,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:13,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189265352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:13,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:13,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:13,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544419345] [2021-07-13 20:43:13,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:13,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:13,239 INFO L87 Difference]: Start difference. First operand 30052 states and 87820 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-07-13 20:43:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:13,793 INFO L93 Difference]: Finished difference Result 34791 states and 100558 transitions. [2021-07-13 20:43:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:43:13,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-07-13 20:43:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:13,863 INFO L225 Difference]: With dead ends: 34791 [2021-07-13 20:43:13,863 INFO L226 Difference]: Without dead ends: 34791 [2021-07-13 20:43:13,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:43:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34791 states. [2021-07-13 20:43:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34791 to 31196. [2021-07-13 20:43:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31196 states, 31195 states have (on average 2.9202756852059624) internal successors, (91098), 31195 states have internal predecessors, (91098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31196 states to 31196 states and 91098 transitions. [2021-07-13 20:43:14,513 INFO L78 Accepts]: Start accepts. Automaton has 31196 states and 91098 transitions. Word has length 37 [2021-07-13 20:43:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:14,513 INFO L482 AbstractCegarLoop]: Abstraction has 31196 states and 91098 transitions. [2021-07-13 20:43:14,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-07-13 20:43:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 31196 states and 91098 transitions. [2021-07-13 20:43:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:14,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:14,556 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:14,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-13 20:43:14,756 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash 184409928, now seen corresponding path program 105 times [2021-07-13 20:43:14,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:14,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804198871] [2021-07-13 20:43:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:14,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:14,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804198871] [2021-07-13 20:43:14,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804198871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:14,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945317040] [2021-07-13 20:43:14,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:14,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:43:14,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:14,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:14,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945317040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:14,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:14,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728411175] [2021-07-13 20:43:14,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:14,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:14,878 INFO L87 Difference]: Start difference. First operand 31196 states and 91098 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-07-13 20:43:15,038 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2021-07-13 20:43:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:15,379 INFO L93 Difference]: Finished difference Result 39476 states and 113843 transitions. [2021-07-13 20:43:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:43:15,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-07-13 20:43:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:15,456 INFO L225 Difference]: With dead ends: 39476 [2021-07-13 20:43:15,456 INFO L226 Difference]: Without dead ends: 39428 [2021-07-13 20:43:15,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:43:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39428 states. [2021-07-13 20:43:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39428 to 33980. [2021-07-13 20:43:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33980 states, 33979 states have (on average 2.9163895347126165) internal successors, (99096), 33979 states have internal predecessors, (99096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33980 states to 33980 states and 99096 transitions. [2021-07-13 20:43:16,221 INFO L78 Accepts]: Start accepts. Automaton has 33980 states and 99096 transitions. Word has length 37 [2021-07-13 20:43:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:16,222 INFO L482 AbstractCegarLoop]: Abstraction has 33980 states and 99096 transitions. [2021-07-13 20:43:16,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-07-13 20:43:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33980 states and 99096 transitions. [2021-07-13 20:43:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:16,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:16,270 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:16,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:16,471 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:16,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1148303984, now seen corresponding path program 106 times [2021-07-13 20:43:16,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:16,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122000729] [2021-07-13 20:43:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:16,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:16,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122000729] [2021-07-13 20:43:16,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122000729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:16,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467109005] [2021-07-13 20:43:16,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:16,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:16,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467109005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:16,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:16,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:16,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610594819] [2021-07-13 20:43:16,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:16,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:16,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:16,624 INFO L87 Difference]: Start difference. First operand 33980 states and 99096 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-07-13 20:43:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:17,224 INFO L93 Difference]: Finished difference Result 38964 states and 112439 transitions. [2021-07-13 20:43:17,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:43:17,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-07-13 20:43:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:17,306 INFO L225 Difference]: With dead ends: 38964 [2021-07-13 20:43:17,306 INFO L226 Difference]: Without dead ends: 38964 [2021-07-13 20:43:17,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:43:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38964 states. [2021-07-13 20:43:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38964 to 35404. [2021-07-13 20:43:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35404 states, 35403 states have (on average 2.923989492415897) internal successors, (103518), 35403 states have internal predecessors, (103518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35404 states to 35404 states and 103518 transitions. [2021-07-13 20:43:18,238 INFO L78 Accepts]: Start accepts. Automaton has 35404 states and 103518 transitions. Word has length 37 [2021-07-13 20:43:18,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:18,238 INFO L482 AbstractCegarLoop]: Abstraction has 35404 states and 103518 transitions. [2021-07-13 20:43:18,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-07-13 20:43:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35404 states and 103518 transitions. [2021-07-13 20:43:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:18,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:18,296 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:18,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 20:43:18,511 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1359001030, now seen corresponding path program 107 times [2021-07-13 20:43:18,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:18,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257077070] [2021-07-13 20:43:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:18,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:18,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257077070] [2021-07-13 20:43:18,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257077070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:18,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388203151] [2021-07-13 20:43:18,566 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 [2021-07-13 20:43:18,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:43:18,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:18,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:18,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388203151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:18,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:18,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:18,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470927223] [2021-07-13 20:43:18,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:18,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:18,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:18,668 INFO L87 Difference]: Start difference. First operand 35404 states and 103518 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-07-13 20:43:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:19,118 INFO L93 Difference]: Finished difference Result 42608 states and 123206 transitions. [2021-07-13 20:43:19,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:43:19,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-07-13 20:43:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:19,480 INFO L225 Difference]: With dead ends: 42608 [2021-07-13 20:43:19,480 INFO L226 Difference]: Without dead ends: 42590 [2021-07-13 20:43:19,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:43:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42590 states. [2021-07-13 20:43:20,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42590 to 35964. [2021-07-13 20:43:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35964 states, 35963 states have (on average 2.924227678447293) internal successors, (105164), 35963 states have internal predecessors, (105164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35964 states to 35964 states and 105164 transitions. [2021-07-13 20:43:20,312 INFO L78 Accepts]: Start accepts. Automaton has 35964 states and 105164 transitions. Word has length 37 [2021-07-13 20:43:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:20,312 INFO L482 AbstractCegarLoop]: Abstraction has 35964 states and 105164 transitions. [2021-07-13 20:43:20,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-07-13 20:43:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35964 states and 105164 transitions. [2021-07-13 20:43:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:20,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:20,362 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:20,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:20,577 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:20,577 INFO L82 PathProgramCache]: Analyzing trace with hash -630249212, now seen corresponding path program 108 times [2021-07-13 20:43:20,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:20,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735977350] [2021-07-13 20:43:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:20,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:20,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735977350] [2021-07-13 20:43:20,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735977350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818984641] [2021-07-13 20:43:20,613 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 [2021-07-13 20:43:20,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:43:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:20,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818984641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:20,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:20,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:20,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109769635] [2021-07-13 20:43:20,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:20,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:20,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:20,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:20,708 INFO L87 Difference]: Start difference. First operand 35964 states and 105164 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:21,507 INFO L93 Difference]: Finished difference Result 41823 states and 120036 transitions. [2021-07-13 20:43:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:43:21,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-13 20:43:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:21,596 INFO L225 Difference]: With dead ends: 41823 [2021-07-13 20:43:21,596 INFO L226 Difference]: Without dead ends: 41816 [2021-07-13 20:43:21,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:43:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41816 states. [2021-07-13 20:43:22,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41816 to 34914. [2021-07-13 20:43:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34914 states, 34913 states have (on average 2.913441984361126) internal successors, (101717), 34913 states have internal predecessors, (101717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34914 states to 34914 states and 101717 transitions. [2021-07-13 20:43:22,606 INFO L78 Accepts]: Start accepts. Automaton has 34914 states and 101717 transitions. Word has length 37 [2021-07-13 20:43:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:22,607 INFO L482 AbstractCegarLoop]: Abstraction has 34914 states and 101717 transitions. [2021-07-13 20:43:22,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 34914 states and 101717 transitions. [2021-07-13 20:43:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:22,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:22,657 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:22,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:22,866 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1007220366, now seen corresponding path program 109 times [2021-07-13 20:43:22,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:22,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136707449] [2021-07-13 20:43:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:22,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:22,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136707449] [2021-07-13 20:43:22,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136707449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969455901] [2021-07-13 20:43:22,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:22,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:22,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969455901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:22,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:22,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:43:22,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370447036] [2021-07-13 20:43:22,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:22,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:22,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:22,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:22,996 INFO L87 Difference]: Start difference. First operand 34914 states and 101717 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:23,681 INFO L93 Difference]: Finished difference Result 37167 states and 107431 transitions. [2021-07-13 20:43:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:43:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-07-13 20:43:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:23,770 INFO L225 Difference]: With dead ends: 37167 [2021-07-13 20:43:23,771 INFO L226 Difference]: Without dead ends: 37153 [2021-07-13 20:43:23,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:43:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37153 states. [2021-07-13 20:43:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37153 to 32388. [2021-07-13 20:43:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32388 states, 32387 states have (on average 2.9138234476796248) internal successors, (94370), 32387 states have internal predecessors, (94370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32388 states to 32388 states and 94370 transitions. [2021-07-13 20:43:24,572 INFO L78 Accepts]: Start accepts. Automaton has 32388 states and 94370 transitions. Word has length 37 [2021-07-13 20:43:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:24,572 INFO L482 AbstractCegarLoop]: Abstraction has 32388 states and 94370 transitions. [2021-07-13 20:43:24,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-07-13 20:43:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32388 states and 94370 transitions. [2021-07-13 20:43:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:24,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:24,641 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:24,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:24,871 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash 186679958, now seen corresponding path program 110 times [2021-07-13 20:43:24,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:24,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309709371] [2021-07-13 20:43:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:24,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:24,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309709371] [2021-07-13 20:43:24,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309709371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:24,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885251325] [2021-07-13 20:43:24,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:24,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:24,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:24,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:24,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:25,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885251325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:25,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:25,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:43:25,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251772880] [2021-07-13 20:43:25,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:25,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:25,005 INFO L87 Difference]: Start difference. First operand 32388 states and 94370 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:25,266 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:43:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:25,536 INFO L93 Difference]: Finished difference Result 36029 states and 103999 transitions. [2021-07-13 20:43:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:43:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:43:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:25,609 INFO L225 Difference]: With dead ends: 36029 [2021-07-13 20:43:25,610 INFO L226 Difference]: Without dead ends: 36017 [2021-07-13 20:43:25,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:43:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36017 states. [2021-07-13 20:43:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36017 to 32678. [2021-07-13 20:43:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32678 states, 32677 states have (on average 2.913884383511338) internal successors, (95217), 32677 states have internal predecessors, (95217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32678 states to 32678 states and 95217 transitions. [2021-07-13 20:43:26,284 INFO L78 Accepts]: Start accepts. Automaton has 32678 states and 95217 transitions. Word has length 37 [2021-07-13 20:43:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:26,284 INFO L482 AbstractCegarLoop]: Abstraction has 32678 states and 95217 transitions. [2021-07-13 20:43:26,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 32678 states and 95217 transitions. [2021-07-13 20:43:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:26,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:26,349 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:26,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:26,564 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -910944820, now seen corresponding path program 111 times [2021-07-13 20:43:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:26,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155431546] [2021-07-13 20:43:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:26,689 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 20:43:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:26,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:26,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155431546] [2021-07-13 20:43:26,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155431546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:26,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046557382] [2021-07-13 20:43:26,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:26,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:26,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:26,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046557382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:26,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:26,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:43:26,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719432476] [2021-07-13 20:43:26,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:26,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:26,818 INFO L87 Difference]: Start difference. First operand 32678 states and 95217 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:27,261 INFO L93 Difference]: Finished difference Result 37754 states and 108873 transitions. [2021-07-13 20:43:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:43:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:43:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:27,335 INFO L225 Difference]: With dead ends: 37754 [2021-07-13 20:43:27,336 INFO L226 Difference]: Without dead ends: 37748 [2021-07-13 20:43:27,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:43:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37748 states. [2021-07-13 20:43:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37748 to 32756. [2021-07-13 20:43:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32756 states, 32755 states have (on average 2.913753625400702) internal successors, (95440), 32755 states have internal predecessors, (95440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32756 states to 32756 states and 95440 transitions. [2021-07-13 20:43:28,065 INFO L78 Accepts]: Start accepts. Automaton has 32756 states and 95440 transitions. Word has length 37 [2021-07-13 20:43:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:28,065 INFO L482 AbstractCegarLoop]: Abstraction has 32756 states and 95440 transitions. [2021-07-13 20:43:28,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 32756 states and 95440 transitions. [2021-07-13 20:43:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:28,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:28,105 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:28,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:28,306 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash -11649450, now seen corresponding path program 112 times [2021-07-13 20:43:28,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:28,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408248534] [2021-07-13 20:43:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:28,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:28,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408248534] [2021-07-13 20:43:28,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408248534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:28,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016734259] [2021-07-13 20:43:28,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:28,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:28,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:28,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:28,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016734259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:28,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:28,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:43:28,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988978212] [2021-07-13 20:43:28,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:28,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:28,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:28,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:28,428 INFO L87 Difference]: Start difference. First operand 32756 states and 95440 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:29,057 INFO L93 Difference]: Finished difference Result 39250 states and 113105 transitions. [2021-07-13 20:43:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:43:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:43:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:29,135 INFO L225 Difference]: With dead ends: 39250 [2021-07-13 20:43:29,135 INFO L226 Difference]: Without dead ends: 39250 [2021-07-13 20:43:29,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:43:29,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39250 states. [2021-07-13 20:43:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39250 to 34480. [2021-07-13 20:43:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.9163258795208677) internal successors, (100552), 34479 states have internal predecessors, (100552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 100552 transitions. [2021-07-13 20:43:29,804 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 100552 transitions. Word has length 37 [2021-07-13 20:43:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:29,804 INFO L482 AbstractCegarLoop]: Abstraction has 34480 states and 100552 transitions. [2021-07-13 20:43:29,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 100552 transitions. [2021-07-13 20:43:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:29,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:29,851 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:30,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 20:43:30,052 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:30,052 INFO L82 PathProgramCache]: Analyzing trace with hash 129434168, now seen corresponding path program 113 times [2021-07-13 20:43:30,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:30,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119042973] [2021-07-13 20:43:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:30,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:30,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119042973] [2021-07-13 20:43:30,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119042973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:30,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430443041] [2021-07-13 20:43:30,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:30,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:43:30,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:30,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:30,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:30,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430443041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:30,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:30,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:43:30,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587849115] [2021-07-13 20:43:30,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:30,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:30,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:30,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:30,172 INFO L87 Difference]: Start difference. First operand 34480 states and 100552 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-07-13 20:43:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:30,728 INFO L93 Difference]: Finished difference Result 38561 states and 111257 transitions. [2021-07-13 20:43:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:43:30,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-07-13 20:43:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:30,801 INFO L225 Difference]: With dead ends: 38561 [2021-07-13 20:43:30,801 INFO L226 Difference]: Without dead ends: 38540 [2021-07-13 20:43:30,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:43:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38540 states. [2021-07-13 20:43:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38540 to 31858. [2021-07-13 20:43:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31858 states, 31857 states have (on average 2.9098471293593247) internal successors, (92699), 31857 states have internal predecessors, (92699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31858 states to 31858 states and 92699 transitions. [2021-07-13 20:43:31,474 INFO L78 Accepts]: Start accepts. Automaton has 31858 states and 92699 transitions. Word has length 37 [2021-07-13 20:43:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:31,474 INFO L482 AbstractCegarLoop]: Abstraction has 31858 states and 92699 transitions. [2021-07-13 20:43:31,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-07-13 20:43:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 31858 states and 92699 transitions. [2021-07-13 20:43:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:31,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:31,518 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:31,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:43:31,725 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash 213832942, now seen corresponding path program 114 times [2021-07-13 20:43:31,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:31,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003396844] [2021-07-13 20:43:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:31,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003396844] [2021-07-13 20:43:31,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003396844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815732799] [2021-07-13 20:43:31,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:31,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:43:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:31,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815732799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:31,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:31,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:43:31,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923525097] [2021-07-13 20:43:31,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:31,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:31,982 INFO L87 Difference]: Start difference. First operand 31858 states and 92699 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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) [2021-07-13 20:43:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:32,395 INFO L93 Difference]: Finished difference Result 37036 states and 106722 transitions. [2021-07-13 20:43:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:43:32,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 37 [2021-07-13 20:43:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:32,474 INFO L225 Difference]: With dead ends: 37036 [2021-07-13 20:43:32,474 INFO L226 Difference]: Without dead ends: 36980 [2021-07-13 20:43:32,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:43:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36980 states. [2021-07-13 20:43:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36980 to 32346. [2021-07-13 20:43:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32346 states, 32345 states have (on average 2.913000463750193) internal successors, (94221), 32345 states have internal predecessors, (94221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32346 states to 32346 states and 94221 transitions. [2021-07-13 20:43:33,277 INFO L78 Accepts]: Start accepts. Automaton has 32346 states and 94221 transitions. Word has length 37 [2021-07-13 20:43:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:33,277 INFO L482 AbstractCegarLoop]: Abstraction has 32346 states and 94221 transitions. [2021-07-13 20:43:33,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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) [2021-07-13 20:43:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32346 states and 94221 transitions. [2021-07-13 20:43:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:33,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:33,336 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:33,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 20:43:33,537 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1613237908, now seen corresponding path program 115 times [2021-07-13 20:43:33,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:33,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164023187] [2021-07-13 20:43:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:33,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:33,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164023187] [2021-07-13 20:43:33,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164023187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065820844] [2021-07-13 20:43:33,567 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 [2021-07-13 20:43:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:33,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:33,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065820844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:33,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:33,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:43:33,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755384265] [2021-07-13 20:43:33,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:33,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:33,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:33,686 INFO L87 Difference]: Start difference. First operand 32346 states and 94221 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:34,151 INFO L93 Difference]: Finished difference Result 37351 states and 107673 transitions. [2021-07-13 20:43:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:43:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:43:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:34,233 INFO L225 Difference]: With dead ends: 37351 [2021-07-13 20:43:34,233 INFO L226 Difference]: Without dead ends: 37339 [2021-07-13 20:43:34,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:43:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37339 states. [2021-07-13 20:43:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37339 to 33412. [2021-07-13 20:43:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33412 states, 33411 states have (on average 2.9077848612732335) internal successors, (97152), 33411 states have internal predecessors, (97152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33412 states to 33412 states and 97152 transitions. [2021-07-13 20:43:35,033 INFO L78 Accepts]: Start accepts. Automaton has 33412 states and 97152 transitions. Word has length 37 [2021-07-13 20:43:35,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:35,033 INFO L482 AbstractCegarLoop]: Abstraction has 33412 states and 97152 transitions. [2021-07-13 20:43:35,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:35,033 INFO L276 IsEmpty]: Start isEmpty. Operand 33412 states and 97152 transitions. [2021-07-13 20:43:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:35,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:35,076 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:35,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 20:43:35,277 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash -15482446, now seen corresponding path program 116 times [2021-07-13 20:43:35,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:35,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138683940] [2021-07-13 20:43:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:35,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:35,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138683940] [2021-07-13 20:43:35,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138683940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687486646] [2021-07-13 20:43:35,302 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 [2021-07-13 20:43:35,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:35,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:35,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:35,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687486646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:35,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:35,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:43:35,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577505463] [2021-07-13 20:43:35,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:35,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:35,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:35,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:35,411 INFO L87 Difference]: Start difference. First operand 33412 states and 97152 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:36,070 INFO L93 Difference]: Finished difference Result 42266 states and 121578 transitions. [2021-07-13 20:43:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:43:36,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:43:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:36,151 INFO L225 Difference]: With dead ends: 42266 [2021-07-13 20:43:36,151 INFO L226 Difference]: Without dead ends: 42260 [2021-07-13 20:43:36,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:43:36,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42260 states. [2021-07-13 20:43:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42260 to 36196. [2021-07-13 20:43:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36196 states, 36195 states have (on average 2.9085232766956763) internal successors, (105274), 36195 states have internal predecessors, (105274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36196 states to 36196 states and 105274 transitions. [2021-07-13 20:43:36,867 INFO L78 Accepts]: Start accepts. Automaton has 36196 states and 105274 transitions. Word has length 37 [2021-07-13 20:43:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:36,867 INFO L482 AbstractCegarLoop]: Abstraction has 36196 states and 105274 transitions. [2021-07-13 20:43:36,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 36196 states and 105274 transitions. [2021-07-13 20:43:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:36,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:36,917 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:37,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:37,117 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1464079188, now seen corresponding path program 117 times [2021-07-13 20:43:37,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:37,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826936501] [2021-07-13 20:43:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:37,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:37,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826936501] [2021-07-13 20:43:37,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826936501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:37,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321838962] [2021-07-13 20:43:37,138 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 [2021-07-13 20:43:37,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:43:37,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:37,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:37,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:37,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321838962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:37,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:37,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 20:43:37,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219706943] [2021-07-13 20:43:37,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:37,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:37,254 INFO L87 Difference]: Start difference. First operand 36196 states and 105274 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:37,926 INFO L93 Difference]: Finished difference Result 47527 states and 136941 transitions. [2021-07-13 20:43:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:43:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:43:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:38,022 INFO L225 Difference]: With dead ends: 47527 [2021-07-13 20:43:38,022 INFO L226 Difference]: Without dead ends: 47527 [2021-07-13 20:43:38,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:43:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47527 states. [2021-07-13 20:43:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47527 to 41782. [2021-07-13 20:43:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41782 states, 41781 states have (on average 2.9070869533998707) internal successors, (121461), 41781 states have internal predecessors, (121461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41782 states to 41782 states and 121461 transitions. [2021-07-13 20:43:38,966 INFO L78 Accepts]: Start accepts. Automaton has 41782 states and 121461 transitions. Word has length 37 [2021-07-13 20:43:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:38,966 INFO L482 AbstractCegarLoop]: Abstraction has 41782 states and 121461 transitions. [2021-07-13 20:43:38,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 41782 states and 121461 transitions. [2021-07-13 20:43:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:39,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:39,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:39,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:39,224 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1605162806, now seen corresponding path program 118 times [2021-07-13 20:43:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:39,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818568049] [2021-07-13 20:43:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:39,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:39,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818568049] [2021-07-13 20:43:39,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818568049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:39,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153856825] [2021-07-13 20:43:39,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:43:39,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:39,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:39,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:39,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153856825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:39,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:39,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 20:43:39,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266706585] [2021-07-13 20:43:39,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:43:39,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:39,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:43:39,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:43:39,351 INFO L87 Difference]: Start difference. First operand 41782 states and 121461 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-07-13 20:43:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:39,958 INFO L93 Difference]: Finished difference Result 46978 states and 135486 transitions. [2021-07-13 20:43:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:43:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-07-13 20:43:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:40,049 INFO L225 Difference]: With dead ends: 46978 [2021-07-13 20:43:40,049 INFO L226 Difference]: Without dead ends: 46964 [2021-07-13 20:43:40,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:43:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46964 states. [2021-07-13 20:43:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46964 to 40988. [2021-07-13 20:43:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40988 states, 40987 states have (on average 2.9025300705101618) internal successors, (118966), 40987 states have internal predecessors, (118966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40988 states to 40988 states and 118966 transitions. [2021-07-13 20:43:40,986 INFO L78 Accepts]: Start accepts. Automaton has 40988 states and 118966 transitions. Word has length 37 [2021-07-13 20:43:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:40,986 INFO L482 AbstractCegarLoop]: Abstraction has 40988 states and 118966 transitions. [2021-07-13 20:43:40,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2021-07-13 20:43:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 40988 states and 118966 transitions. [2021-07-13 20:43:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:41,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:41,036 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:41,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:41,236 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:41,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1689561580, now seen corresponding path program 119 times [2021-07-13 20:43:41,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:41,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133250880] [2021-07-13 20:43:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:41,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133250880] [2021-07-13 20:43:41,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133250880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404274420] [2021-07-13 20:43:41,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:41,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:43:41,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:41,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404274420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:41,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:41,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:43:41,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52148127] [2021-07-13 20:43:41,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:43:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:43:41,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:43:41,391 INFO L87 Difference]: Start difference. First operand 40988 states and 118966 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-07-13 20:43:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:41,845 INFO L93 Difference]: Finished difference Result 47765 states and 137692 transitions. [2021-07-13 20:43:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:43:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-07-13 20:43:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:41,941 INFO L225 Difference]: With dead ends: 47765 [2021-07-13 20:43:41,941 INFO L226 Difference]: Without dead ends: 47709 [2021-07-13 20:43:41,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:43:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47709 states. [2021-07-13 20:43:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47709 to 41900. [2021-07-13 20:43:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41900 states, 41899 states have (on average 2.9004988185875558) internal successors, (121528), 41899 states have internal predecessors, (121528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41900 states to 41900 states and 121528 transitions. [2021-07-13 20:43:42,936 INFO L78 Accepts]: Start accepts. Automaton has 41900 states and 121528 transitions. Word has length 37 [2021-07-13 20:43:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:42,936 INFO L482 AbstractCegarLoop]: Abstraction has 41900 states and 121528 transitions. [2021-07-13 20:43:42,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2021-07-13 20:43:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 41900 states and 121528 transitions. [2021-07-13 20:43:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:43:42,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:42,994 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:43,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:43,195 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:43,196 INFO L82 PathProgramCache]: Analyzing trace with hash -965368206, now seen corresponding path program 120 times [2021-07-13 20:43:43,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:43,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624057650] [2021-07-13 20:43:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:43,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:43,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624057650] [2021-07-13 20:43:43,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624057650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:43,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264883003] [2021-07-13 20:43:43,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:43,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:43:43,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:43:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:43,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264883003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:43,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:43,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:43:43,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691768247] [2021-07-13 20:43:43,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:43:43,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:43,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:43:43,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:43:43,332 INFO L87 Difference]: Start difference. First operand 41900 states and 121528 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-07-13 20:43:43,566 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2021-07-13 20:43:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:43,916 INFO L93 Difference]: Finished difference Result 48735 states and 140489 transitions. [2021-07-13 20:43:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:43:43,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 37 [2021-07-13 20:43:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:44,030 INFO L225 Difference]: With dead ends: 48735 [2021-07-13 20:43:44,031 INFO L226 Difference]: Without dead ends: 48637 [2021-07-13 20:43:44,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:43:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48637 states. [2021-07-13 20:43:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48637 to 43264. [2021-07-13 20:43:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43264 states, 43263 states have (on average 2.899382844462936) internal successors, (125436), 43263 states have internal predecessors, (125436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43264 states to 43264 states and 125436 transitions. [2021-07-13 20:43:45,074 INFO L78 Accepts]: Start accepts. Automaton has 43264 states and 125436 transitions. Word has length 37 [2021-07-13 20:43:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:45,075 INFO L482 AbstractCegarLoop]: Abstraction has 43264 states and 125436 transitions. [2021-07-13 20:43:45,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-07-13 20:43:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 43264 states and 125436 transitions. [2021-07-13 20:43:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:43:45,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:45,142 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:45,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:45,343 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash -168599578, now seen corresponding path program 121 times [2021-07-13 20:43:45,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:45,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056905200] [2021-07-13 20:43:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:45,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056905200] [2021-07-13 20:43:45,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056905200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493772731] [2021-07-13 20:43:45,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:45,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:43:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:45,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493772731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:45,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:45,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:43:45,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193671865] [2021-07-13 20:43:45,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:43:45,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:43:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:43:45,677 INFO L87 Difference]: Start difference. First operand 43264 states and 125436 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:46,303 INFO L93 Difference]: Finished difference Result 58686 states and 170040 transitions. [2021-07-13 20:43:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:43:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:43:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:46,453 INFO L225 Difference]: With dead ends: 58686 [2021-07-13 20:43:46,453 INFO L226 Difference]: Without dead ends: 58556 [2021-07-13 20:43:46,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:43:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58556 states. [2021-07-13 20:43:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58556 to 58022. [2021-07-13 20:43:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58022 states, 58021 states have (on average 2.9038623946502127) internal successors, (168485), 58021 states have internal predecessors, (168485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58022 states to 58022 states and 168485 transitions. [2021-07-13 20:43:47,700 INFO L78 Accepts]: Start accepts. Automaton has 58022 states and 168485 transitions. Word has length 40 [2021-07-13 20:43:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:47,700 INFO L482 AbstractCegarLoop]: Abstraction has 58022 states and 168485 transitions. [2021-07-13 20:43:47,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 58022 states and 168485 transitions. [2021-07-13 20:43:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:43:47,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:47,799 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:47,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:47,999 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1587056994, now seen corresponding path program 122 times [2021-07-13 20:43:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:47,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921603791] [2021-07-13 20:43:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:48,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:48,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921603791] [2021-07-13 20:43:48,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921603791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:48,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922725723] [2021-07-13 20:43:48,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:48,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:43:48,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:48,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:43:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:48,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922725723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:48,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:48,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:43:48,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458054178] [2021-07-13 20:43:48,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:43:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:43:48,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:48,582 INFO L87 Difference]: Start difference. First operand 58022 states and 168485 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:49,059 INFO L93 Difference]: Finished difference Result 59437 states and 172239 transitions. [2021-07-13 20:43:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:43:49,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:43:49,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:49,213 INFO L225 Difference]: With dead ends: 59437 [2021-07-13 20:43:49,213 INFO L226 Difference]: Without dead ends: 59301 [2021-07-13 20:43:49,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:43:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59301 states. [2021-07-13 20:43:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59301 to 51338. [2021-07-13 20:43:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51338 states, 51337 states have (on average 2.8983579094999707) internal successors, (148793), 51337 states have internal predecessors, (148793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51338 states to 51338 states and 148793 transitions. [2021-07-13 20:43:50,361 INFO L78 Accepts]: Start accepts. Automaton has 51338 states and 148793 transitions. Word has length 40 [2021-07-13 20:43:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:50,361 INFO L482 AbstractCegarLoop]: Abstraction has 51338 states and 148793 transitions. [2021-07-13 20:43:50,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 51338 states and 148793 transitions. [2021-07-13 20:43:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:43:50,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:50,624 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:50,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 20:43:50,840 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:50,840 INFO L82 PathProgramCache]: Analyzing trace with hash -278483584, now seen corresponding path program 123 times [2021-07-13 20:43:50,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:50,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56083613] [2021-07-13 20:43:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:50,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:50,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56083613] [2021-07-13 20:43:50,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56083613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:50,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695401932] [2021-07-13 20:43:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:50,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:43:50,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:50,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:43:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:51,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695401932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:51,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:51,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:43:51,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164266951] [2021-07-13 20:43:51,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:43:51,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:51,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:43:51,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:51,173 INFO L87 Difference]: Start difference. First operand 51338 states and 148793 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:51,595 INFO L93 Difference]: Finished difference Result 54288 states and 157054 transitions. [2021-07-13 20:43:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:43:51,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:43:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:51,749 INFO L225 Difference]: With dead ends: 54288 [2021-07-13 20:43:51,749 INFO L226 Difference]: Without dead ends: 54157 [2021-07-13 20:43:51,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:43:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54157 states. [2021-07-13 20:43:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54157 to 49332. [2021-07-13 20:43:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49332 states, 49331 states have (on average 2.899920942206726) internal successors, (143056), 49331 states have internal predecessors, (143056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49332 states to 49332 states and 143056 transitions. [2021-07-13 20:43:52,846 INFO L78 Accepts]: Start accepts. Automaton has 49332 states and 143056 transitions. Word has length 40 [2021-07-13 20:43:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:52,846 INFO L482 AbstractCegarLoop]: Abstraction has 49332 states and 143056 transitions. [2021-07-13 20:43:52,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 49332 states and 143056 transitions. [2021-07-13 20:43:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:43:52,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:52,915 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:53,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 20:43:53,115 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1999940992, now seen corresponding path program 124 times [2021-07-13 20:43:53,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:53,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518357812] [2021-07-13 20:43:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:43:53,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:53,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518357812] [2021-07-13 20:43:53,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518357812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:53,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858169589] [2021-07-13 20:43:53,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:53,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:43:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:53,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:43:53,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:53,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858169589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:53,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:53,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:43:53,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495784652] [2021-07-13 20:43:53,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:43:53,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:53,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:43:53,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:43:53,579 INFO L87 Difference]: Start difference. First operand 49332 states and 143056 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:54,003 INFO L93 Difference]: Finished difference Result 50140 states and 145062 transitions. [2021-07-13 20:43:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:43:54,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:43:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:54,137 INFO L225 Difference]: With dead ends: 50140 [2021-07-13 20:43:54,137 INFO L226 Difference]: Without dead ends: 50002 [2021-07-13 20:43:54,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 378.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:43:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50002 states. [2021-07-13 20:43:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50002 to 49328. [2021-07-13 20:43:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49328 states, 49327 states have (on average 2.898169359579946) internal successors, (142958), 49327 states have internal predecessors, (142958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49328 states to 49328 states and 142958 transitions. [2021-07-13 20:43:55,222 INFO L78 Accepts]: Start accepts. Automaton has 49328 states and 142958 transitions. Word has length 40 [2021-07-13 20:43:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:55,222 INFO L482 AbstractCegarLoop]: Abstraction has 49328 states and 142958 transitions. [2021-07-13 20:43:55,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 49328 states and 142958 transitions. [2021-07-13 20:43:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:43:55,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:55,302 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:55,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-13 20:43:55,502 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1295591104, now seen corresponding path program 125 times [2021-07-13 20:43:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:55,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181079864] [2021-07-13 20:43:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:55,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:55,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181079864] [2021-07-13 20:43:55,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181079864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:55,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764302660] [2021-07-13 20:43:55,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:55,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:43:55,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:55,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:43:55,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:55,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764302660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:55,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:55,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 20:43:55,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956929727] [2021-07-13 20:43:55,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:43:55,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:43:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:43:55,994 INFO L87 Difference]: Start difference. First operand 49328 states and 142958 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:56,404 INFO L93 Difference]: Finished difference Result 50012 states and 144533 transitions. [2021-07-13 20:43:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:43:56,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:43:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:56,514 INFO L225 Difference]: With dead ends: 50012 [2021-07-13 20:43:56,514 INFO L226 Difference]: Without dead ends: 49858 [2021-07-13 20:43:56,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 406.7ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:43:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49858 states. [2021-07-13 20:43:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49858 to 44902. [2021-07-13 20:43:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44902 states, 44901 states have (on average 2.895815237967974) internal successors, (130025), 44901 states have internal predecessors, (130025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44902 states to 44902 states and 130025 transitions. [2021-07-13 20:43:57,533 INFO L78 Accepts]: Start accepts. Automaton has 44902 states and 130025 transitions. Word has length 40 [2021-07-13 20:43:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:43:57,533 INFO L482 AbstractCegarLoop]: Abstraction has 44902 states and 130025 transitions. [2021-07-13 20:43:57,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 44902 states and 130025 transitions. [2021-07-13 20:43:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:43:57,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:43:57,596 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:43:57,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:57,797 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:43:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:43:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1712941184, now seen corresponding path program 126 times [2021-07-13 20:43:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:43:57,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845063551] [2021-07-13 20:43:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:43:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:43:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:43:57,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:43:57,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845063551] [2021-07-13 20:43:57,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845063551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:57,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966368995] [2021-07-13 20:43:57,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:43:57,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:43:57,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:43:57,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:43:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:43:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:43:58,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966368995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:43:58,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:43:58,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-07-13 20:43:58,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508576968] [2021-07-13 20:43:58,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:43:58,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:43:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:43:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:43:58,139 INFO L87 Difference]: Start difference. First operand 44902 states and 130025 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:43:58,414 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:43:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:43:58,884 INFO L93 Difference]: Finished difference Result 53560 states and 155441 transitions. [2021-07-13 20:43:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:43:58,884 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:43:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:43:59,014 INFO L225 Difference]: With dead ends: 53560 [2021-07-13 20:43:59,014 INFO L226 Difference]: Without dead ends: 53454 [2021-07-13 20:43:59,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 504.5ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:43:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53454 states. [2021-07-13 20:43:59,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53454 to 52666. [2021-07-13 20:44:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52666 states, 52665 states have (on average 2.9090477546757807) internal successors, (153205), 52665 states have internal predecessors, (153205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52666 states to 52666 states and 153205 transitions. [2021-07-13 20:44:00,177 INFO L78 Accepts]: Start accepts. Automaton has 52666 states and 153205 transitions. Word has length 40 [2021-07-13 20:44:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:00,177 INFO L482 AbstractCegarLoop]: Abstraction has 52666 states and 153205 transitions. [2021-07-13 20:44:00,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 52666 states and 153205 transitions. [2021-07-13 20:44:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:00,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:00,266 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:00,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:00,467 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:00,467 INFO L82 PathProgramCache]: Analyzing trace with hash 707939840, now seen corresponding path program 127 times [2021-07-13 20:44:00,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:00,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430602233] [2021-07-13 20:44:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:00,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:00,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430602233] [2021-07-13 20:44:00,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430602233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:00,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900347481] [2021-07-13 20:44:00,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:00,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:00,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900347481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:00,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:00,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:44:00,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131797463] [2021-07-13 20:44:00,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:00,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:00,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:00,977 INFO L87 Difference]: Start difference. First operand 52666 states and 153205 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:01,473 INFO L93 Difference]: Finished difference Result 54310 states and 157576 transitions. [2021-07-13 20:44:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:44:01,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:01,606 INFO L225 Difference]: With dead ends: 54310 [2021-07-13 20:44:01,606 INFO L226 Difference]: Without dead ends: 54186 [2021-07-13 20:44:01,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:44:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54186 states. [2021-07-13 20:44:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54186 to 52670. [2021-07-13 20:44:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52670 states, 52669 states have (on average 2.9054092540203915) internal successors, (153025), 52669 states have internal predecessors, (153025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52670 states to 52670 states and 153025 transitions. [2021-07-13 20:44:02,774 INFO L78 Accepts]: Start accepts. Automaton has 52670 states and 153025 transitions. Word has length 40 [2021-07-13 20:44:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:02,775 INFO L482 AbstractCegarLoop]: Abstraction has 52670 states and 153025 transitions. [2021-07-13 20:44:02,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 52670 states and 153025 transitions. [2021-07-13 20:44:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:02,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:02,863 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:03,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:03,064 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:03,064 INFO L82 PathProgramCache]: Analyzing trace with hash 858134054, now seen corresponding path program 128 times [2021-07-13 20:44:03,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:03,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580128358] [2021-07-13 20:44:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:03,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:03,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580128358] [2021-07-13 20:44:03,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580128358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:03,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022929515] [2021-07-13 20:44:03,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:03,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:44:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:03,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022929515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:03,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:03,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 20:44:03,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93838374] [2021-07-13 20:44:03,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:44:03,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:44:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:03,589 INFO L87 Difference]: Start difference. First operand 52670 states and 153025 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:04,449 INFO L93 Difference]: Finished difference Result 57020 states and 165804 transitions. [2021-07-13 20:44:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:44:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:04,582 INFO L225 Difference]: With dead ends: 57020 [2021-07-13 20:44:04,582 INFO L226 Difference]: Without dead ends: 56880 [2021-07-13 20:44:04,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:44:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56880 states. [2021-07-13 20:44:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56880 to 56257. [2021-07-13 20:44:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56257 states, 56256 states have (on average 2.912987059158134) internal successors, (163873), 56256 states have internal predecessors, (163873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56257 states to 56257 states and 163873 transitions. [2021-07-13 20:44:05,915 INFO L78 Accepts]: Start accepts. Automaton has 56257 states and 163873 transitions. Word has length 40 [2021-07-13 20:44:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:05,915 INFO L482 AbstractCegarLoop]: Abstraction has 56257 states and 163873 transitions. [2021-07-13 20:44:05,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:05,915 INFO L276 IsEmpty]: Start isEmpty. Operand 56257 states and 163873 transitions. [2021-07-13 20:44:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:06,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:06,002 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:06,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 20:44:06,203 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1915634814, now seen corresponding path program 129 times [2021-07-13 20:44:06,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:06,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649595154] [2021-07-13 20:44:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:06,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:06,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649595154] [2021-07-13 20:44:06,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649595154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:06,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137118581] [2021-07-13 20:44:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:06,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:44:06,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:06,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:44:06,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:06,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137118581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:06,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:06,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-07-13 20:44:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197225542] [2021-07-13 20:44:06,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:44:06,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:06,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:44:06,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:44:06,541 INFO L87 Difference]: Start difference. First operand 56257 states and 163873 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:07,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:07,346 INFO L93 Difference]: Finished difference Result 61509 states and 178656 transitions. [2021-07-13 20:44:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:44:07,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:07,502 INFO L225 Difference]: With dead ends: 61509 [2021-07-13 20:44:07,502 INFO L226 Difference]: Without dead ends: 61403 [2021-07-13 20:44:07,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 361.4ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:44:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61403 states. [2021-07-13 20:44:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61403 to 56597. [2021-07-13 20:44:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56597 states, 56596 states have (on average 2.913651141423422) internal successors, (164901), 56596 states have internal predecessors, (164901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56597 states to 56597 states and 164901 transitions. [2021-07-13 20:44:08,742 INFO L78 Accepts]: Start accepts. Automaton has 56597 states and 164901 transitions. Word has length 40 [2021-07-13 20:44:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:08,742 INFO L482 AbstractCegarLoop]: Abstraction has 56597 states and 164901 transitions. [2021-07-13 20:44:08,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 56597 states and 164901 transitions. [2021-07-13 20:44:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:08,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:08,839 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:09,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-07-13 20:44:09,041 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash 505246210, now seen corresponding path program 130 times [2021-07-13 20:44:09,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:09,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573485520] [2021-07-13 20:44:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:09,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:09,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573485520] [2021-07-13 20:44:09,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573485520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573645893] [2021-07-13 20:44:09,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:09,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:09,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:09,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:09,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:09,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573645893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:09,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:09,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:44:09,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276516395] [2021-07-13 20:44:09,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:09,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:09,352 INFO L87 Difference]: Start difference. First operand 56597 states and 164901 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:10,015 INFO L93 Difference]: Finished difference Result 61273 states and 177698 transitions. [2021-07-13 20:44:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:44:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:10,162 INFO L225 Difference]: With dead ends: 61273 [2021-07-13 20:44:10,162 INFO L226 Difference]: Without dead ends: 61149 [2021-07-13 20:44:10,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:44:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61149 states. [2021-07-13 20:44:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61149 to 55077. [2021-07-13 20:44:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55077 states, 55076 states have (on average 2.9098155276345414) internal successors, (160261), 55076 states have internal predecessors, (160261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55077 states to 55077 states and 160261 transitions. [2021-07-13 20:44:11,440 INFO L78 Accepts]: Start accepts. Automaton has 55077 states and 160261 transitions. Word has length 40 [2021-07-13 20:44:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:11,440 INFO L482 AbstractCegarLoop]: Abstraction has 55077 states and 160261 transitions. [2021-07-13 20:44:11,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 55077 states and 160261 transitions. [2021-07-13 20:44:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:11,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:11,530 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:11,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-07-13 20:44:11,733 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:11,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1597779582, now seen corresponding path program 131 times [2021-07-13 20:44:11,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:11,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851150948] [2021-07-13 20:44:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:12,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:12,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851150948] [2021-07-13 20:44:12,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851150948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:12,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217133355] [2021-07-13 20:44:12,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:12,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:44:12,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:12,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217133355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:12,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:12,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:44:12,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648962990] [2021-07-13 20:44:12,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:12,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:12,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:12,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:12,281 INFO L87 Difference]: Start difference. First operand 55077 states and 160261 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:12,759 INFO L93 Difference]: Finished difference Result 60406 states and 175015 transitions. [2021-07-13 20:44:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:44:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:12,899 INFO L225 Difference]: With dead ends: 60406 [2021-07-13 20:44:12,899 INFO L226 Difference]: Without dead ends: 60268 [2021-07-13 20:44:12,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:44:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60268 states. [2021-07-13 20:44:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60268 to 56259. [2021-07-13 20:44:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56259 states, 56258 states have (on average 2.9118703117778804) internal successors, (163816), 56258 states have internal predecessors, (163816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56259 states to 56259 states and 163816 transitions. [2021-07-13 20:44:14,289 INFO L78 Accepts]: Start accepts. Automaton has 56259 states and 163816 transitions. Word has length 40 [2021-07-13 20:44:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:14,289 INFO L482 AbstractCegarLoop]: Abstraction has 56259 states and 163816 transitions. [2021-07-13 20:44:14,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 56259 states and 163816 transitions. [2021-07-13 20:44:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:14,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:14,375 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:14,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:14,576 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash 847564098, now seen corresponding path program 132 times [2021-07-13 20:44:14,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:14,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16213241] [2021-07-13 20:44:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:14,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:14,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16213241] [2021-07-13 20:44:14,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16213241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:14,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502560484] [2021-07-13 20:44:14,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:14,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:44:14,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:14,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:14,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:14,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502560484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:14,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:14,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:44:14,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345489122] [2021-07-13 20:44:14,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:14,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:14,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:14,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:14,891 INFO L87 Difference]: Start difference. First operand 56259 states and 163816 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:15,589 INFO L93 Difference]: Finished difference Result 61835 states and 179356 transitions. [2021-07-13 20:44:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:44:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:15,741 INFO L225 Difference]: With dead ends: 61835 [2021-07-13 20:44:15,741 INFO L226 Difference]: Without dead ends: 61705 [2021-07-13 20:44:15,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:15,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61705 states. [2021-07-13 20:44:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61705 to 56921. [2021-07-13 20:44:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56921 states, 56920 states have (on average 2.9132290934645115) internal successors, (165821), 56920 states have internal predecessors, (165821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56921 states to 56921 states and 165821 transitions. [2021-07-13 20:44:17,014 INFO L78 Accepts]: Start accepts. Automaton has 56921 states and 165821 transitions. Word has length 40 [2021-07-13 20:44:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:17,014 INFO L482 AbstractCegarLoop]: Abstraction has 56921 states and 165821 transitions. [2021-07-13 20:44:17,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 56921 states and 165821 transitions. [2021-07-13 20:44:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:17,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:17,114 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:17,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:17,321 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash 655440424, now seen corresponding path program 133 times [2021-07-13 20:44:17,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:17,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45841544] [2021-07-13 20:44:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:17,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45841544] [2021-07-13 20:44:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45841544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221312631] [2021-07-13 20:44:17,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:17,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:17,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221312631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:17,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:17,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:44:17,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807829647] [2021-07-13 20:44:17,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:17,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:17,625 INFO L87 Difference]: Start difference. First operand 56921 states and 165821 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:18,369 INFO L93 Difference]: Finished difference Result 64086 states and 186017 transitions. [2021-07-13 20:44:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:44:18,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:18,537 INFO L225 Difference]: With dead ends: 64086 [2021-07-13 20:44:18,537 INFO L226 Difference]: Without dead ends: 64004 [2021-07-13 20:44:18,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:44:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64004 states. [2021-07-13 20:44:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64004 to 57035. [2021-07-13 20:44:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57035 states, 57034 states have (on average 2.9135953992355437) internal successors, (166174), 57034 states have internal predecessors, (166174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57035 states to 57035 states and 166174 transitions. [2021-07-13 20:44:20,141 INFO L78 Accepts]: Start accepts. Automaton has 57035 states and 166174 transitions. Word has length 40 [2021-07-13 20:44:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:20,141 INFO L482 AbstractCegarLoop]: Abstraction has 57035 states and 166174 transitions. [2021-07-13 20:44:20,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57035 states and 166174 transitions. [2021-07-13 20:44:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:20,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:20,255 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:20,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 20:44:20,465 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash 536357412, now seen corresponding path program 134 times [2021-07-13 20:44:20,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:20,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33231461] [2021-07-13 20:44:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:20,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:20,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33231461] [2021-07-13 20:44:20,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33231461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:20,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303774770] [2021-07-13 20:44:20,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:20,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:20,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303774770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:20,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:20,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:44:20,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568451927] [2021-07-13 20:44:20,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:20,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:20,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:20,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:20,769 INFO L87 Difference]: Start difference. First operand 57035 states and 166174 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:21,558 INFO L93 Difference]: Finished difference Result 62077 states and 179978 transitions. [2021-07-13 20:44:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:44:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:21,704 INFO L225 Difference]: With dead ends: 62077 [2021-07-13 20:44:21,704 INFO L226 Difference]: Without dead ends: 61965 [2021-07-13 20:44:21,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:44:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61965 states. [2021-07-13 20:44:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61965 to 56895. [2021-07-13 20:44:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56895 states, 56894 states have (on average 2.912011811438816) internal successors, (165676), 56894 states have internal predecessors, (165676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56895 states to 56895 states and 165676 transitions. [2021-07-13 20:44:22,894 INFO L78 Accepts]: Start accepts. Automaton has 56895 states and 165676 transitions. Word has length 40 [2021-07-13 20:44:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:22,894 INFO L482 AbstractCegarLoop]: Abstraction has 56895 states and 165676 transitions. [2021-07-13 20:44:22,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 56895 states and 165676 transitions. [2021-07-13 20:44:22,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:22,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:22,987 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:23,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-07-13 20:44:23,187 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:23,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:23,188 INFO L82 PathProgramCache]: Analyzing trace with hash 680644994, now seen corresponding path program 135 times [2021-07-13 20:44:23,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:23,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772071329] [2021-07-13 20:44:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:44:23,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:23,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772071329] [2021-07-13 20:44:23,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772071329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:23,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901578507] [2021-07-13 20:44:23,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:23,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:44:23,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:23,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:23,542 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 20:44:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:23,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901578507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:23,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:23,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:44:23,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531338946] [2021-07-13 20:44:23,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:23,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:23,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:23,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:23,685 INFO L87 Difference]: Start difference. First operand 56895 states and 165676 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:24,181 INFO L93 Difference]: Finished difference Result 63722 states and 184946 transitions. [2021-07-13 20:44:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:44:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:24,326 INFO L225 Difference]: With dead ends: 63722 [2021-07-13 20:44:24,326 INFO L226 Difference]: Without dead ends: 63598 [2021-07-13 20:44:24,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:44:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63598 states. [2021-07-13 20:44:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63598 to 59825. [2021-07-13 20:44:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59825 states, 59824 states have (on average 2.91443233484889) internal successors, (174353), 59824 states have internal predecessors, (174353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59825 states to 59825 states and 174353 transitions. [2021-07-13 20:44:25,800 INFO L78 Accepts]: Start accepts. Automaton has 59825 states and 174353 transitions. Word has length 40 [2021-07-13 20:44:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:25,800 INFO L482 AbstractCegarLoop]: Abstraction has 59825 states and 174353 transitions. [2021-07-13 20:44:25,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59825 states and 174353 transitions. [2021-07-13 20:44:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:25,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:25,889 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:26,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:26,089 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1680080194, now seen corresponding path program 136 times [2021-07-13 20:44:26,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:26,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940739531] [2021-07-13 20:44:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:44:26,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940739531] [2021-07-13 20:44:26,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940739531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602382398] [2021-07-13 20:44:26,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:26,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:26,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:26,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602382398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:26,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:26,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:44:26,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222899544] [2021-07-13 20:44:26,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:26,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:26,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:26,399 INFO L87 Difference]: Start difference. First operand 59825 states and 174353 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:27,046 INFO L93 Difference]: Finished difference Result 64092 states and 186172 transitions. [2021-07-13 20:44:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:44:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:27,195 INFO L225 Difference]: With dead ends: 64092 [2021-07-13 20:44:27,195 INFO L226 Difference]: Without dead ends: 63962 [2021-07-13 20:44:27,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:44:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63962 states. [2021-07-13 20:44:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63962 to 60549. [2021-07-13 20:44:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60549 states, 60548 states have (on average 2.9153564114421617) internal successors, (176519), 60548 states have internal predecessors, (176519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60549 states to 60549 states and 176519 transitions. [2021-07-13 20:44:28,454 INFO L78 Accepts]: Start accepts. Automaton has 60549 states and 176519 transitions. Word has length 40 [2021-07-13 20:44:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:28,454 INFO L482 AbstractCegarLoop]: Abstraction has 60549 states and 176519 transitions. [2021-07-13 20:44:28,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 60549 states and 176519 transitions. [2021-07-13 20:44:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:28,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:28,554 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:28,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:28,754 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1154139774, now seen corresponding path program 137 times [2021-07-13 20:44:28,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:28,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090913787] [2021-07-13 20:44:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:28,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:28,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090913787] [2021-07-13 20:44:28,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090913787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:28,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235675620] [2021-07-13 20:44:28,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:28,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:44:28,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:28,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:29,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235675620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:29,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:29,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 20:44:29,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894907233] [2021-07-13 20:44:29,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:44:29,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:29,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:44:29,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:44:29,285 INFO L87 Difference]: Start difference. First operand 60549 states and 176519 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:29,706 INFO L93 Difference]: Finished difference Result 64173 states and 186340 transitions. [2021-07-13 20:44:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:44:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:29,869 INFO L225 Difference]: With dead ends: 64173 [2021-07-13 20:44:29,869 INFO L226 Difference]: Without dead ends: 64097 [2021-07-13 20:44:29,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64097 states. [2021-07-13 20:44:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64097 to 60583. [2021-07-13 20:44:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60583 states, 60582 states have (on average 2.9148757056551453) internal successors, (176589), 60582 states have internal predecessors, (176589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60583 states to 60583 states and 176589 transitions. [2021-07-13 20:44:31,432 INFO L78 Accepts]: Start accepts. Automaton has 60583 states and 176589 transitions. Word has length 40 [2021-07-13 20:44:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:31,432 INFO L482 AbstractCegarLoop]: Abstraction has 60583 states and 176589 transitions. [2021-07-13 20:44:31,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 60583 states and 176589 transitions. [2021-07-13 20:44:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:31,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:31,537 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:31,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:31,738 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:31,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:31,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1877078918, now seen corresponding path program 138 times [2021-07-13 20:44:31,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:31,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506295220] [2021-07-13 20:44:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:31,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:31,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506295220] [2021-07-13 20:44:31,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506295220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:31,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756973706] [2021-07-13 20:44:31,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:31,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:44:31,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:31,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:44:31,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:32,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756973706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:32,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:32,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-07-13 20:44:32,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94681083] [2021-07-13 20:44:32,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:44:32,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:44:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:44:32,050 INFO L87 Difference]: Start difference. First operand 60583 states and 176589 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:33,028 INFO L93 Difference]: Finished difference Result 82088 states and 237961 transitions. [2021-07-13 20:44:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:44:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:33,240 INFO L225 Difference]: With dead ends: 82088 [2021-07-13 20:44:33,240 INFO L226 Difference]: Without dead ends: 82006 [2021-07-13 20:44:33,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 365.3ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:44:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82006 states. [2021-07-13 20:44:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82006 to 61790. [2021-07-13 20:44:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61790 states, 61789 states have (on average 2.917121170434867) internal successors, (180246), 61789 states have internal predecessors, (180246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61790 states to 61790 states and 180246 transitions. [2021-07-13 20:44:34,919 INFO L78 Accepts]: Start accepts. Automaton has 61790 states and 180246 transitions. Word has length 40 [2021-07-13 20:44:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:34,919 INFO L482 AbstractCegarLoop]: Abstraction has 61790 states and 180246 transitions. [2021-07-13 20:44:34,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 61790 states and 180246 transitions. [2021-07-13 20:44:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:35,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:35,048 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:35,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 20:44:35,249 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1757995906, now seen corresponding path program 139 times [2021-07-13 20:44:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:35,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093497557] [2021-07-13 20:44:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:35,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:35,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093497557] [2021-07-13 20:44:35,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093497557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:35,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255124974] [2021-07-13 20:44:35,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:35,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255124974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:35,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:35,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 20:44:35,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305399666] [2021-07-13 20:44:35,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:35,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:35,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:35,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:35,553 INFO L87 Difference]: Start difference. First operand 61790 states and 180246 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:36,433 INFO L93 Difference]: Finished difference Result 82000 states and 237771 transitions. [2021-07-13 20:44:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:44:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:36,648 INFO L225 Difference]: With dead ends: 82000 [2021-07-13 20:44:36,648 INFO L226 Difference]: Without dead ends: 81888 [2021-07-13 20:44:36,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:44:36,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81888 states. [2021-07-13 20:44:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81888 to 60650. [2021-07-13 20:44:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60650 states, 60649 states have (on average 2.9150686738445812) internal successors, (176796), 60649 states have internal predecessors, (176796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60650 states to 60650 states and 176796 transitions. [2021-07-13 20:44:38,073 INFO L78 Accepts]: Start accepts. Automaton has 60650 states and 176796 transitions. Word has length 40 [2021-07-13 20:44:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:38,074 INFO L482 AbstractCegarLoop]: Abstraction has 60650 states and 176796 transitions. [2021-07-13 20:44:38,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 60650 states and 176796 transitions. [2021-07-13 20:44:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:38,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:38,406 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:38,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 20:44:38,628 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:38,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:38,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1902283488, now seen corresponding path program 140 times [2021-07-13 20:44:38,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:38,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94458041] [2021-07-13 20:44:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:38,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:38,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94458041] [2021-07-13 20:44:38,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94458041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:38,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739333500] [2021-07-13 20:44:38,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:38,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:38,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:38,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:38,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:38,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739333500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:38,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:38,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 20:44:38,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213004713] [2021-07-13 20:44:38,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:38,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:38,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:38,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:38,929 INFO L87 Difference]: Start difference. First operand 60650 states and 176796 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:39,734 INFO L93 Difference]: Finished difference Result 81755 states and 237013 transitions. [2021-07-13 20:44:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:44:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:39,932 INFO L225 Difference]: With dead ends: 81755 [2021-07-13 20:44:39,932 INFO L226 Difference]: Without dead ends: 81638 [2021-07-13 20:44:39,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:44:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81638 states. [2021-07-13 20:44:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81638 to 60642. [2021-07-13 20:44:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60642 states, 60641 states have (on average 2.914925545423064) internal successors, (176764), 60641 states have internal predecessors, (176764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60642 states to 60642 states and 176764 transitions. [2021-07-13 20:44:41,322 INFO L78 Accepts]: Start accepts. Automaton has 60642 states and 176764 transitions. Word has length 40 [2021-07-13 20:44:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:41,322 INFO L482 AbstractCegarLoop]: Abstraction has 60642 states and 176764 transitions. [2021-07-13 20:44:41,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 60642 states and 176764 transitions. [2021-07-13 20:44:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:41,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:41,429 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:41,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:41,630 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1393248608, now seen corresponding path program 141 times [2021-07-13 20:44:41,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:41,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392992624] [2021-07-13 20:44:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:41,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:41,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392992624] [2021-07-13 20:44:41,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392992624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:41,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811614801] [2021-07-13 20:44:41,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:42,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:44:42,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:42,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811614801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:42,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:42,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 20:44:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228881721] [2021-07-13 20:44:42,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:42,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:42,178 INFO L87 Difference]: Start difference. First operand 60642 states and 176764 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:42,726 INFO L93 Difference]: Finished difference Result 81347 states and 235787 transitions. [2021-07-13 20:44:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:44:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:43,137 INFO L225 Difference]: With dead ends: 81347 [2021-07-13 20:44:43,138 INFO L226 Difference]: Without dead ends: 81271 [2021-07-13 20:44:43,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81271 states. [2021-07-13 20:44:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81271 to 61294. [2021-07-13 20:44:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61294 states, 61293 states have (on average 2.916026299903741) internal successors, (178732), 61293 states have internal predecessors, (178732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61294 states to 61294 states and 178732 transitions. [2021-07-13 20:44:44,534 INFO L78 Accepts]: Start accepts. Automaton has 61294 states and 178732 transitions. Word has length 40 [2021-07-13 20:44:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:44,535 INFO L482 AbstractCegarLoop]: Abstraction has 61294 states and 178732 transitions. [2021-07-13 20:44:44,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 61294 states and 178732 transitions. [2021-07-13 20:44:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:44,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:44,637 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:44,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-13 20:44:44,838 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:44,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:44,838 INFO L82 PathProgramCache]: Analyzing trace with hash 67498720, now seen corresponding path program 142 times [2021-07-13 20:44:44,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:44,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036721803] [2021-07-13 20:44:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:44,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:44,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036721803] [2021-07-13 20:44:44,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036721803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:44,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368193766] [2021-07-13 20:44:44,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:44,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:44:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:44,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368193766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:45,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:45,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 20:44:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310540423] [2021-07-13 20:44:45,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:45,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:45,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:45,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:45,148 INFO L87 Difference]: Start difference. First operand 61294 states and 178732 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:45,832 INFO L93 Difference]: Finished difference Result 81072 states and 235165 transitions. [2021-07-13 20:44:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:44:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:46,044 INFO L225 Difference]: With dead ends: 81072 [2021-07-13 20:44:46,044 INFO L226 Difference]: Without dead ends: 81034 [2021-07-13 20:44:46,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:44:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81034 states. [2021-07-13 20:44:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81034 to 61288. [2021-07-13 20:44:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61288 states, 61287 states have (on average 2.91606702889683) internal successors, (178717), 61287 states have internal predecessors, (178717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61288 states to 61288 states and 178717 transitions. [2021-07-13 20:44:47,698 INFO L78 Accepts]: Start accepts. Automaton has 61288 states and 178717 transitions. Word has length 40 [2021-07-13 20:44:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:47,698 INFO L482 AbstractCegarLoop]: Abstraction has 61288 states and 178717 transitions. [2021-07-13 20:44:47,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 61288 states and 178717 transitions. [2021-07-13 20:44:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:47,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:47,800 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:48,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:48,001 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:48,001 INFO L82 PathProgramCache]: Analyzing trace with hash -173272574, now seen corresponding path program 143 times [2021-07-13 20:44:48,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:48,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403871734] [2021-07-13 20:44:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:48,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403871734] [2021-07-13 20:44:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403871734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393724958] [2021-07-13 20:44:48,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:48,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:44:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:48,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393724958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:48,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:48,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-07-13 20:44:48,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362110710] [2021-07-13 20:44:48,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:44:48,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:48,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:44:48,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:44:48,299 INFO L87 Difference]: Start difference. First operand 61288 states and 178717 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:48,954 INFO L93 Difference]: Finished difference Result 81193 states and 235418 transitions. [2021-07-13 20:44:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:44:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:49,153 INFO L225 Difference]: With dead ends: 81193 [2021-07-13 20:44:49,153 INFO L226 Difference]: Without dead ends: 81155 [2021-07-13 20:44:49,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:44:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81155 states. [2021-07-13 20:44:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81155 to 61295. [2021-07-13 20:44:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61295 states, 61294 states have (on average 2.915946095865827) internal successors, (178730), 61294 states have internal predecessors, (178730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61295 states to 61295 states and 178730 transitions. [2021-07-13 20:44:50,777 INFO L78 Accepts]: Start accepts. Automaton has 61295 states and 178730 transitions. Word has length 40 [2021-07-13 20:44:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:50,778 INFO L482 AbstractCegarLoop]: Abstraction has 61295 states and 178730 transitions. [2021-07-13 20:44:50,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 61295 states and 178730 transitions. [2021-07-13 20:44:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:50,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:50,878 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:51,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:51,078 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash -767162530, now seen corresponding path program 144 times [2021-07-13 20:44:51,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:51,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945268657] [2021-07-13 20:44:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:51,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:51,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945268657] [2021-07-13 20:44:51,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945268657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:51,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879372929] [2021-07-13 20:44:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:51,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:44:51,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:44:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:51,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879372929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:51,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:51,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:44:51,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972442255] [2021-07-13 20:44:51,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:44:51,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:51,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:44:51,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:44:51,459 INFO L87 Difference]: Start difference. First operand 61295 states and 178730 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:52,279 INFO L93 Difference]: Finished difference Result 70857 states and 206368 transitions. [2021-07-13 20:44:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:44:52,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:52,455 INFO L225 Difference]: With dead ends: 70857 [2021-07-13 20:44:52,455 INFO L226 Difference]: Without dead ends: 70755 [2021-07-13 20:44:52,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:44:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70755 states. [2021-07-13 20:44:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70755 to 70395. [2021-07-13 20:44:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70395 states, 70394 states have (on average 2.91669744580504) internal successors, (205318), 70394 states have internal predecessors, (205318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70395 states to 70395 states and 205318 transitions. [2021-07-13 20:44:54,020 INFO L78 Accepts]: Start accepts. Automaton has 70395 states and 205318 transitions. Word has length 40 [2021-07-13 20:44:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:54,021 INFO L482 AbstractCegarLoop]: Abstraction has 70395 states and 205318 transitions. [2021-07-13 20:44:54,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 70395 states and 205318 transitions. [2021-07-13 20:44:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:54,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:54,395 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:54,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 20:44:54,610 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:54,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:54,611 INFO L82 PathProgramCache]: Analyzing trace with hash -795271714, now seen corresponding path program 145 times [2021-07-13 20:44:54,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:54,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903122729] [2021-07-13 20:44:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:54,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:54,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903122729] [2021-07-13 20:44:54,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903122729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:54,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578992955] [2021-07-13 20:44:54,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:54,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:54,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578992955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:54,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:54,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-07-13 20:44:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477696644] [2021-07-13 20:44:54,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:44:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:44:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:44:54,895 INFO L87 Difference]: Start difference. First operand 70395 states and 205318 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:55,375 INFO L93 Difference]: Finished difference Result 71033 states and 206969 transitions. [2021-07-13 20:44:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:44:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:55,772 INFO L225 Difference]: With dead ends: 71033 [2021-07-13 20:44:55,772 INFO L226 Difference]: Without dead ends: 70911 [2021-07-13 20:44:55,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:44:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70911 states. [2021-07-13 20:44:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70911 to 70329. [2021-07-13 20:44:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70329 states, 70328 states have (on average 2.9153537709020587) internal successors, (205031), 70328 states have internal predecessors, (205031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70329 states to 70329 states and 205031 transitions. [2021-07-13 20:44:57,123 INFO L78 Accepts]: Start accepts. Automaton has 70329 states and 205031 transitions. Word has length 40 [2021-07-13 20:44:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:44:57,123 INFO L482 AbstractCegarLoop]: Abstraction has 70329 states and 205031 transitions. [2021-07-13 20:44:57,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 70329 states and 205031 transitions. [2021-07-13 20:44:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:44:57,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:44:57,236 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:44:57,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 20:44:57,437 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:44:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:44:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash -659065114, now seen corresponding path program 146 times [2021-07-13 20:44:57,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:44:57,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124093909] [2021-07-13 20:44:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:44:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:44:57,713 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 3 [2021-07-13 20:44:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:57,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:44:57,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124093909] [2021-07-13 20:44:57,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124093909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:57,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045195829] [2021-07-13 20:44:57,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:44:57,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:44:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:44:57,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:44:57,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:44:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:44:58,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045195829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:44:58,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:44:58,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 20:44:58,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319906281] [2021-07-13 20:44:58,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:44:58,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:44:58,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:44:58,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:44:58,018 INFO L87 Difference]: Start difference. First operand 70329 states and 205031 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:44:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:44:58,520 INFO L93 Difference]: Finished difference Result 77454 states and 225677 transitions. [2021-07-13 20:44:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:44:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:44:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:44:58,899 INFO L225 Difference]: With dead ends: 77454 [2021-07-13 20:44:58,899 INFO L226 Difference]: Without dead ends: 77330 [2021-07-13 20:44:58,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:44:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77330 states. [2021-07-13 20:45:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77330 to 76843. [2021-07-13 20:45:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76843 states, 76842 states have (on average 2.917258790765467) internal successors, (224168), 76842 states have internal predecessors, (224168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76843 states to 76843 states and 224168 transitions. [2021-07-13 20:45:00,668 INFO L78 Accepts]: Start accepts. Automaton has 76843 states and 224168 transitions. Word has length 40 [2021-07-13 20:45:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:00,668 INFO L482 AbstractCegarLoop]: Abstraction has 76843 states and 224168 transitions. [2021-07-13 20:45:00,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 76843 states and 224168 transitions. [2021-07-13 20:45:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:00,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:00,801 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:01,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-07-13 20:45:01,001 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:01,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1961568290, now seen corresponding path program 147 times [2021-07-13 20:45:01,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:01,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871841155] [2021-07-13 20:45:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:45:01,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:01,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871841155] [2021-07-13 20:45:01,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871841155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:01,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881945704] [2021-07-13 20:45:01,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:01,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:45:01,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:01,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:01,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:01,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881945704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:01,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:01,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 20:45:01,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601335969] [2021-07-13 20:45:01,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:45:01,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:01,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:45:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:01,311 INFO L87 Difference]: Start difference. First operand 76843 states and 224168 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:02,116 INFO L93 Difference]: Finished difference Result 82752 states and 241463 transitions. [2021-07-13 20:45:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:45:02,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:02,340 INFO L225 Difference]: With dead ends: 82752 [2021-07-13 20:45:02,340 INFO L226 Difference]: Without dead ends: 82621 [2021-07-13 20:45:02,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:45:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82621 states. [2021-07-13 20:45:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82621 to 82147. [2021-07-13 20:45:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82147 states, 82146 states have (on average 2.920775205122587) internal successors, (239930), 82146 states have internal predecessors, (239930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82147 states to 82147 states and 239930 transitions. [2021-07-13 20:45:04,276 INFO L78 Accepts]: Start accepts. Automaton has 82147 states and 239930 transitions. Word has length 40 [2021-07-13 20:45:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:04,276 INFO L482 AbstractCegarLoop]: Abstraction has 82147 states and 239930 transitions. [2021-07-13 20:45:04,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 82147 states and 239930 transitions. [2021-07-13 20:45:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:04,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:04,424 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:04,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-13 20:45:04,625 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:04,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash -962133090, now seen corresponding path program 148 times [2021-07-13 20:45:04,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:04,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851740960] [2021-07-13 20:45:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:04,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:04,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851740960] [2021-07-13 20:45:04,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851740960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:04,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804146583] [2021-07-13 20:45:04,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:04,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:04,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:04,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:05,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804146583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:05,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:05,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 20:45:05,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848578785] [2021-07-13 20:45:05,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:45:05,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:45:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:45:05,239 INFO L87 Difference]: Start difference. First operand 82147 states and 239930 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:05,837 INFO L93 Difference]: Finished difference Result 82726 states and 241251 transitions. [2021-07-13 20:45:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:45:05,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:06,245 INFO L225 Difference]: With dead ends: 82726 [2021-07-13 20:45:06,245 INFO L226 Difference]: Without dead ends: 82596 [2021-07-13 20:45:06,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:45:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82596 states. [2021-07-13 20:45:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82596 to 82137. [2021-07-13 20:45:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82137 states, 82136 states have (on average 2.9207533846303693) internal successors, (239899), 82136 states have internal predecessors, (239899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82137 states to 82137 states and 239899 transitions. [2021-07-13 20:45:08,196 INFO L78 Accepts]: Start accepts. Automaton has 82137 states and 239899 transitions. Word has length 40 [2021-07-13 20:45:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:08,196 INFO L482 AbstractCegarLoop]: Abstraction has 82137 states and 239899 transitions. [2021-07-13 20:45:08,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 82137 states and 239899 transitions. [2021-07-13 20:45:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:08,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:08,330 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:08,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-13 20:45:08,531 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1656251366, now seen corresponding path program 149 times [2021-07-13 20:45:08,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:08,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852935883] [2021-07-13 20:45:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:08,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:08,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852935883] [2021-07-13 20:45:08,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852935883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:08,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915955190] [2021-07-13 20:45:08,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:08,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:08,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:08,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:08,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915955190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:08,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:08,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-07-13 20:45:08,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975004544] [2021-07-13 20:45:08,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:45:08,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:08,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:45:08,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:45:08,834 INFO L87 Difference]: Start difference. First operand 82137 states and 239899 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:09,706 INFO L93 Difference]: Finished difference Result 109260 states and 318066 transitions. [2021-07-13 20:45:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:45:09,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:10,009 INFO L225 Difference]: With dead ends: 109260 [2021-07-13 20:45:10,009 INFO L226 Difference]: Without dead ends: 109223 [2021-07-13 20:45:10,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109223 states. [2021-07-13 20:45:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109223 to 82145. [2021-07-13 20:45:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82145 states, 82144 states have (on average 2.9207124074795483) internal successors, (239919), 82144 states have internal predecessors, (239919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82145 states to 82145 states and 239919 transitions. [2021-07-13 20:45:12,231 INFO L78 Accepts]: Start accepts. Automaton has 82145 states and 239919 transitions. Word has length 40 [2021-07-13 20:45:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:12,231 INFO L482 AbstractCegarLoop]: Abstraction has 82145 states and 239919 transitions. [2021-07-13 20:45:12,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand 82145 states and 239919 transitions. [2021-07-13 20:45:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:12,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:12,374 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:12,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-13 20:45:12,575 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash -468263070, now seen corresponding path program 150 times [2021-07-13 20:45:12,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:12,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513424921] [2021-07-13 20:45:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:12,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:12,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513424921] [2021-07-13 20:45:12,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513424921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:12,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870443996] [2021-07-13 20:45:12,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:12,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:12,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870443996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:12,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:12,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 20:45:12,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032166132] [2021-07-13 20:45:12,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:12,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:12,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:12,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:12,884 INFO L87 Difference]: Start difference. First operand 82145 states and 239919 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:13,772 INFO L93 Difference]: Finished difference Result 109204 states and 317974 transitions. [2021-07-13 20:45:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:45:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:14,104 INFO L225 Difference]: With dead ends: 109204 [2021-07-13 20:45:14,104 INFO L226 Difference]: Without dead ends: 109167 [2021-07-13 20:45:14,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109167 states. [2021-07-13 20:45:15,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109167 to 82167. [2021-07-13 20:45:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82167 states, 82166 states have (on average 2.9207214662999292) internal successors, (239984), 82166 states have internal predecessors, (239984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82167 states to 82167 states and 239984 transitions. [2021-07-13 20:45:16,474 INFO L78 Accepts]: Start accepts. Automaton has 82167 states and 239984 transitions. Word has length 40 [2021-07-13 20:45:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:16,474 INFO L482 AbstractCegarLoop]: Abstraction has 82167 states and 239984 transitions. [2021-07-13 20:45:16,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 82167 states and 239984 transitions. [2021-07-13 20:45:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:16,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:16,609 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:16,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-13 20:45:16,809 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2062909402, now seen corresponding path program 151 times [2021-07-13 20:45:16,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:16,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471000895] [2021-07-13 20:45:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:16,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:16,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471000895] [2021-07-13 20:45:16,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471000895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:16,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448850385] [2021-07-13 20:45:16,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:17,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448850385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:17,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:17,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 20:45:17,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528520523] [2021-07-13 20:45:17,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:17,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:17,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:17,108 INFO L87 Difference]: Start difference. First operand 82167 states and 239984 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:18,078 INFO L93 Difference]: Finished difference Result 110875 states and 322803 transitions. [2021-07-13 20:45:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:45:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:18,399 INFO L225 Difference]: With dead ends: 110875 [2021-07-13 20:45:18,399 INFO L226 Difference]: Without dead ends: 110801 [2021-07-13 20:45:18,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:45:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110801 states. [2021-07-13 20:45:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110801 to 83719. [2021-07-13 20:45:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83719 states, 83718 states have (on average 2.9211400176783964) internal successors, (244552), 83718 states have internal predecessors, (244552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83719 states to 83719 states and 244552 transitions. [2021-07-13 20:45:20,706 INFO L78 Accepts]: Start accepts. Automaton has 83719 states and 244552 transitions. Word has length 40 [2021-07-13 20:45:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:20,707 INFO L482 AbstractCegarLoop]: Abstraction has 83719 states and 244552 transitions. [2021-07-13 20:45:20,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 83719 states and 244552 transitions. [2021-07-13 20:45:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:20,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:20,842 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:21,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-13 20:45:21,043 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:21,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1566833442, now seen corresponding path program 152 times [2021-07-13 20:45:21,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:21,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869949444] [2021-07-13 20:45:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:21,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:21,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869949444] [2021-07-13 20:45:21,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869949444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:21,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479425370] [2021-07-13 20:45:21,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:21,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:45:21,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:21,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479425370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:21,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:21,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 20:45:21,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291882595] [2021-07-13 20:45:21,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:45:21,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:45:21,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:45:21,379 INFO L87 Difference]: Start difference. First operand 83719 states and 244552 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:22,688 INFO L93 Difference]: Finished difference Result 114350 states and 332583 transitions. [2021-07-13 20:45:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:45:22,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:23,211 INFO L225 Difference]: With dead ends: 114350 [2021-07-13 20:45:23,212 INFO L226 Difference]: Without dead ends: 114244 [2021-07-13 20:45:23,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:45:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114244 states. [2021-07-13 20:45:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114244 to 86541. [2021-07-13 20:45:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86541 states, 86540 states have (on average 2.9220360526923965) internal successors, (252873), 86540 states have internal predecessors, (252873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86541 states to 86541 states and 252873 transitions. [2021-07-13 20:45:25,398 INFO L78 Accepts]: Start accepts. Automaton has 86541 states and 252873 transitions. Word has length 40 [2021-07-13 20:45:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:25,398 INFO L482 AbstractCegarLoop]: Abstraction has 86541 states and 252873 transitions. [2021-07-13 20:45:25,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 86541 states and 252873 transitions. [2021-07-13 20:45:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:25,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:25,841 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:26,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:26,056 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash -188169818, now seen corresponding path program 153 times [2021-07-13 20:45:26,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:26,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136831017] [2021-07-13 20:45:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:26,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136831017] [2021-07-13 20:45:26,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136831017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083087683] [2021-07-13 20:45:26,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:26,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:45:26,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:26,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:45:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:26,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083087683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:26,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:26,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-07-13 20:45:26,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438053624] [2021-07-13 20:45:26,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:45:26,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:26,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:45:26,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:26,384 INFO L87 Difference]: Start difference. First operand 86541 states and 252873 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:27,646 INFO L93 Difference]: Finished difference Result 118350 states and 344791 transitions. [2021-07-13 20:45:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:45:27,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:28,010 INFO L225 Difference]: With dead ends: 118350 [2021-07-13 20:45:28,011 INFO L226 Difference]: Without dead ends: 118260 [2021-07-13 20:45:28,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:45:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118260 states. [2021-07-13 20:45:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118260 to 90723. [2021-07-13 20:45:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90723 states, 90722 states have (on average 2.9247150636008907) internal successors, (265336), 90722 states have internal predecessors, (265336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90723 states to 90723 states and 265336 transitions. [2021-07-13 20:45:30,451 INFO L78 Accepts]: Start accepts. Automaton has 90723 states and 265336 transitions. Word has length 40 [2021-07-13 20:45:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:30,451 INFO L482 AbstractCegarLoop]: Abstraction has 90723 states and 265336 transitions. [2021-07-13 20:45:30,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 90723 states and 265336 transitions. [2021-07-13 20:45:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:30,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:30,600 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:30,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:30,801 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:30,801 INFO L82 PathProgramCache]: Analyzing trace with hash -307252830, now seen corresponding path program 154 times [2021-07-13 20:45:30,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:30,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095787693] [2021-07-13 20:45:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:30,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:30,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095787693] [2021-07-13 20:45:30,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095787693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:30,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482776155] [2021-07-13 20:45:30,917 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 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 [2021-07-13 20:45:30,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:30,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:30,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:30,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:31,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482776155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:31,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:31,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 20:45:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986283500] [2021-07-13 20:45:31,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:31,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:31,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:31,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:31,423 INFO L87 Difference]: Start difference. First operand 90723 states and 265336 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:32,491 INFO L93 Difference]: Finished difference Result 118264 states and 344607 transitions. [2021-07-13 20:45:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:45:32,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:32,826 INFO L225 Difference]: With dead ends: 118264 [2021-07-13 20:45:32,826 INFO L226 Difference]: Without dead ends: 118154 [2021-07-13 20:45:32,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 624.0ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:45:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118154 states. [2021-07-13 20:45:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118154 to 87341. [2021-07-13 20:45:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87341 states, 87340 states have (on average 2.9219029081749484) internal successors, (255199), 87340 states have internal predecessors, (255199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87341 states to 87341 states and 255199 transitions. [2021-07-13 20:45:35,295 INFO L78 Accepts]: Start accepts. Automaton has 87341 states and 255199 transitions. Word has length 40 [2021-07-13 20:45:35,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:35,295 INFO L482 AbstractCegarLoop]: Abstraction has 87341 states and 255199 transitions. [2021-07-13 20:45:35,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:35,295 INFO L276 IsEmpty]: Start isEmpty. Operand 87341 states and 255199 transitions. [2021-07-13 20:45:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:35,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:35,453 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:35,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:35,654 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1858504016, now seen corresponding path program 155 times [2021-07-13 20:45:35,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:35,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289036224] [2021-07-13 20:45:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:35,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:35,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289036224] [2021-07-13 20:45:35,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289036224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:35,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019119742] [2021-07-13 20:45:35,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:35,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:45:35,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:35,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019119742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:35,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:35,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 20:45:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699173899] [2021-07-13 20:45:35,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:45:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:45:35,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:35,989 INFO L87 Difference]: Start difference. First operand 87341 states and 255199 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:36,817 INFO L93 Difference]: Finished difference Result 93177 states and 271062 transitions. [2021-07-13 20:45:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:45:36,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:37,077 INFO L225 Difference]: With dead ends: 93177 [2021-07-13 20:45:37,077 INFO L226 Difference]: Without dead ends: 93103 [2021-07-13 20:45:37,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:45:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93103 states. [2021-07-13 20:45:38,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93103 to 88591. [2021-07-13 20:45:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88591 states, 88590 states have (on average 2.922542047635173) internal successors, (258908), 88590 states have internal predecessors, (258908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88591 states to 88591 states and 258908 transitions. [2021-07-13 20:45:39,283 INFO L78 Accepts]: Start accepts. Automaton has 88591 states and 258908 transitions. Word has length 40 [2021-07-13 20:45:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:39,283 INFO L482 AbstractCegarLoop]: Abstraction has 88591 states and 258908 transitions. [2021-07-13 20:45:39,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 88591 states and 258908 transitions. [2021-07-13 20:45:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:39,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:39,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:39,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-13 20:45:39,633 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash -568520512, now seen corresponding path program 156 times [2021-07-13 20:45:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:39,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256068390] [2021-07-13 20:45:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:39,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:39,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256068390] [2021-07-13 20:45:39,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256068390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:39,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858280051] [2021-07-13 20:45:39,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:39,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:45:39,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:39,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858280051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:39,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:39,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:45:39,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148438960] [2021-07-13 20:45:39,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:39,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:39,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:39,937 INFO L87 Difference]: Start difference. First operand 88591 states and 258908 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:40,746 INFO L93 Difference]: Finished difference Result 94277 states and 274354 transitions. [2021-07-13 20:45:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:45:40,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:40,990 INFO L225 Difference]: With dead ends: 94277 [2021-07-13 20:45:40,990 INFO L226 Difference]: Without dead ends: 94203 [2021-07-13 20:45:40,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:45:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94203 states. [2021-07-13 20:45:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94203 to 88493. [2021-07-13 20:45:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88493 states, 88492 states have (on average 2.9228969850381956) internal successors, (258653), 88492 states have internal predecessors, (258653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88493 states to 88493 states and 258653 transitions. [2021-07-13 20:45:43,223 INFO L78 Accepts]: Start accepts. Automaton has 88493 states and 258653 transitions. Word has length 40 [2021-07-13 20:45:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:43,223 INFO L482 AbstractCegarLoop]: Abstraction has 88493 states and 258653 transitions. [2021-07-13 20:45:43,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 88493 states and 258653 transitions. [2021-07-13 20:45:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:43,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:43,393 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:43,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 20:45:43,594 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:43,594 INFO L82 PathProgramCache]: Analyzing trace with hash -996259750, now seen corresponding path program 157 times [2021-07-13 20:45:43,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:43,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409243940] [2021-07-13 20:45:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:43,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:43,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409243940] [2021-07-13 20:45:43,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409243940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:43,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424690712] [2021-07-13 20:45:43,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:43,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:43,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:43,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424690712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:43,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:43,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:45:43,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859682037] [2021-07-13 20:45:43,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:43,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:43,898 INFO L87 Difference]: Start difference. First operand 88493 states and 258653 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:44,787 INFO L93 Difference]: Finished difference Result 95777 states and 278772 transitions. [2021-07-13 20:45:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:45:44,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:45,051 INFO L225 Difference]: With dead ends: 95777 [2021-07-13 20:45:45,052 INFO L226 Difference]: Without dead ends: 95663 [2021-07-13 20:45:45,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:45:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95663 states. [2021-07-13 20:45:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95663 to 90665. [2021-07-13 20:45:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90665 states, 90664 states have (on average 2.9239279096444015) internal successors, (265095), 90664 states have internal predecessors, (265095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90665 states to 90665 states and 265095 transitions. [2021-07-13 20:45:47,389 INFO L78 Accepts]: Start accepts. Automaton has 90665 states and 265095 transitions. Word has length 40 [2021-07-13 20:45:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:47,390 INFO L482 AbstractCegarLoop]: Abstraction has 90665 states and 265095 transitions. [2021-07-13 20:45:47,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 90665 states and 265095 transitions. [2021-07-13 20:45:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:47,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:47,542 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:47,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-07-13 20:45:47,742 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:47,742 INFO L82 PathProgramCache]: Analyzing trace with hash -703609088, now seen corresponding path program 158 times [2021-07-13 20:45:47,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:47,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915420139] [2021-07-13 20:45:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:47,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:47,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915420139] [2021-07-13 20:45:47,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915420139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:47,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266058280] [2021-07-13 20:45:47,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:47,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:45:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:48,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266058280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:48,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:48,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:45:48,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349604345] [2021-07-13 20:45:48,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:48,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:48,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:48,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:48,075 INFO L87 Difference]: Start difference. First operand 90665 states and 265095 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:49,133 INFO L93 Difference]: Finished difference Result 101385 states and 295508 transitions. [2021-07-13 20:45:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:45:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:49,409 INFO L225 Difference]: With dead ends: 101385 [2021-07-13 20:45:49,409 INFO L226 Difference]: Without dead ends: 101295 [2021-07-13 20:45:49,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:45:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101295 states. [2021-07-13 20:45:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101295 to 95389. [2021-07-13 20:45:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95389 states, 95388 states have (on average 2.928764624481067) internal successors, (279369), 95388 states have internal predecessors, (279369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95389 states to 95389 states and 279369 transitions. [2021-07-13 20:45:51,730 INFO L78 Accepts]: Start accepts. Automaton has 95389 states and 279369 transitions. Word has length 40 [2021-07-13 20:45:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:51,730 INFO L482 AbstractCegarLoop]: Abstraction has 95389 states and 279369 transitions. [2021-07-13 20:45:51,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 95389 states and 279369 transitions. [2021-07-13 20:45:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:51,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:51,903 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:52,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:52,103 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:52,103 INFO L82 PathProgramCache]: Analyzing trace with hash -822692100, now seen corresponding path program 159 times [2021-07-13 20:45:52,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:52,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999811871] [2021-07-13 20:45:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:45:52,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:52,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999811871] [2021-07-13 20:45:52,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999811871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:52,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993650992] [2021-07-13 20:45:52,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:52,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:45:52,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:52,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:52,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:52,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993650992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:52,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:52,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-07-13 20:45:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344829711] [2021-07-13 20:45:52,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:45:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:45:52,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:45:52,401 INFO L87 Difference]: Start difference. First operand 95389 states and 279369 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:53,482 INFO L93 Difference]: Finished difference Result 101362 states and 295444 transitions. [2021-07-13 20:45:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:45:53,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:53,965 INFO L225 Difference]: With dead ends: 101362 [2021-07-13 20:45:53,965 INFO L226 Difference]: Without dead ends: 101246 [2021-07-13 20:45:53,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:45:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101246 states. [2021-07-13 20:45:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101246 to 95295. [2021-07-13 20:45:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95295 states, 95294 states have (on average 2.9271517619157557) internal successors, (278940), 95294 states have internal predecessors, (278940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95295 states to 95295 states and 278940 transitions. [2021-07-13 20:45:56,030 INFO L78 Accepts]: Start accepts. Automaton has 95295 states and 278940 transitions. Word has length 40 [2021-07-13 20:45:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:45:56,030 INFO L482 AbstractCegarLoop]: Abstraction has 95295 states and 278940 transitions. [2021-07-13 20:45:56,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 95295 states and 278940 transitions. [2021-07-13 20:45:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:45:56,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:45:56,523 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:45:56,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:56,738 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:45:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:45:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash -678404518, now seen corresponding path program 160 times [2021-07-13 20:45:56,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:45:56,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709091103] [2021-07-13 20:45:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:45:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:45:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:56,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:45:56,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709091103] [2021-07-13 20:45:56,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709091103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:56,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095323826] [2021-07-13 20:45:56,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:45:56,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:45:56,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:45:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:45:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:45:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:45:57,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095323826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:45:57,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:45:57,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 20:45:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513652265] [2021-07-13 20:45:57,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:45:57,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:45:57,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:45:57,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:45:57,046 INFO L87 Difference]: Start difference. First operand 95295 states and 278940 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:45:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:45:58,053 INFO L93 Difference]: Finished difference Result 100149 states and 291798 transitions. [2021-07-13 20:45:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:45:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:45:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:45:58,352 INFO L225 Difference]: With dead ends: 100149 [2021-07-13 20:45:58,352 INFO L226 Difference]: Without dead ends: 100025 [2021-07-13 20:45:58,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:45:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100025 states. [2021-07-13 20:46:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100025 to 92429. [2021-07-13 20:46:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92429 states, 92428 states have (on average 2.9263967628857057) internal successors, (270481), 92428 states have internal predecessors, (270481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92429 states to 92429 states and 270481 transitions. [2021-07-13 20:46:00,939 INFO L78 Accepts]: Start accepts. Automaton has 92429 states and 270481 transitions. Word has length 40 [2021-07-13 20:46:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:00,939 INFO L482 AbstractCegarLoop]: Abstraction has 92429 states and 270481 transitions. [2021-07-13 20:46:00,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 92429 states and 270481 transitions. [2021-07-13 20:46:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:01,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:01,092 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:01,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-13 20:46:01,292 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash 921725760, now seen corresponding path program 161 times [2021-07-13 20:46:01,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:01,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565546880] [2021-07-13 20:46:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:01,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:01,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565546880] [2021-07-13 20:46:01,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565546880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:01,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759156197] [2021-07-13 20:46:01,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:01,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:01,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:01,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:01,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759156197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:01,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:01,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:46:01,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154707543] [2021-07-13 20:46:01,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:46:01,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:46:01,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:46:01,636 INFO L87 Difference]: Start difference. First operand 92429 states and 270481 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:02,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:02,589 INFO L93 Difference]: Finished difference Result 96091 states and 281017 transitions. [2021-07-13 20:46:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:02,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:02,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:02,863 INFO L225 Difference]: With dead ends: 96091 [2021-07-13 20:46:02,863 INFO L226 Difference]: Without dead ends: 96017 [2021-07-13 20:46:02,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:03,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96017 states. [2021-07-13 20:46:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96017 to 95657. [2021-07-13 20:46:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95657 states, 95656 states have (on average 2.927605168520532) internal successors, (280043), 95656 states have internal predecessors, (280043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95657 states to 95657 states and 280043 transitions. [2021-07-13 20:46:05,196 INFO L78 Accepts]: Start accepts. Automaton has 95657 states and 280043 transitions. Word has length 40 [2021-07-13 20:46:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:05,196 INFO L482 AbstractCegarLoop]: Abstraction has 95657 states and 280043 transitions. [2021-07-13 20:46:05,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 95657 states and 280043 transitions. [2021-07-13 20:46:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:05,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:05,359 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:05,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 20:46:05,559 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:05,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1247148646, now seen corresponding path program 162 times [2021-07-13 20:46:05,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:05,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681800221] [2021-07-13 20:46:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:05,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:05,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681800221] [2021-07-13 20:46:05,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681800221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:05,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985180262] [2021-07-13 20:46:05,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:05,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:46:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:05,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:05,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:05,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985180262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:05,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:05,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 20:46:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593299183] [2021-07-13 20:46:05,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:46:05,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:46:05,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:46:05,883 INFO L87 Difference]: Start difference. First operand 95657 states and 280043 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:06,828 INFO L93 Difference]: Finished difference Result 97781 states and 286026 transitions. [2021-07-13 20:46:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:07,244 INFO L225 Difference]: With dead ends: 97781 [2021-07-13 20:46:07,244 INFO L226 Difference]: Without dead ends: 97707 [2021-07-13 20:46:07,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97707 states. [2021-07-13 20:46:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97707 to 94625. [2021-07-13 20:46:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94625 states, 94624 states have (on average 2.9285487825498815) internal successors, (277111), 94624 states have internal predecessors, (277111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94625 states to 94625 states and 277111 transitions. [2021-07-13 20:46:09,269 INFO L78 Accepts]: Start accepts. Automaton has 94625 states and 277111 transitions. Word has length 40 [2021-07-13 20:46:09,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:09,269 INFO L482 AbstractCegarLoop]: Abstraction has 94625 states and 277111 transitions. [2021-07-13 20:46:09,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 94625 states and 277111 transitions. [2021-07-13 20:46:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:09,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:09,424 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:09,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:09,625 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1651925504, now seen corresponding path program 163 times [2021-07-13 20:46:09,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:09,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216848334] [2021-07-13 20:46:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:09,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:09,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216848334] [2021-07-13 20:46:09,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216848334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:09,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832171700] [2021-07-13 20:46:09,717 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 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 [2021-07-13 20:46:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:09,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:10,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832171700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:10,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:10,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:46:10,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692808891] [2021-07-13 20:46:10,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:46:10,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:10,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:46:10,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:46:10,328 INFO L87 Difference]: Start difference. First operand 94625 states and 277111 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:10,922 INFO L93 Difference]: Finished difference Result 98355 states and 287655 transitions. [2021-07-13 20:46:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:11,340 INFO L225 Difference]: With dead ends: 98355 [2021-07-13 20:46:11,340 INFO L226 Difference]: Without dead ends: 98241 [2021-07-13 20:46:11,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98241 states. [2021-07-13 20:46:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98241 to 94237. [2021-07-13 20:46:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94237 states, 94236 states have (on average 2.92978267328834) internal successors, (276091), 94236 states have internal predecessors, (276091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94237 states to 94237 states and 276091 transitions. [2021-07-13 20:46:13,372 INFO L78 Accepts]: Start accepts. Automaton has 94237 states and 276091 transitions. Word has length 40 [2021-07-13 20:46:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:13,372 INFO L482 AbstractCegarLoop]: Abstraction has 94237 states and 276091 transitions. [2021-07-13 20:46:13,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 94237 states and 276091 transitions. [2021-07-13 20:46:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:13,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:13,532 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:13,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-13 20:46:13,732 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash -904482650, now seen corresponding path program 164 times [2021-07-13 20:46:13,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:13,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962015927] [2021-07-13 20:46:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:14,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:14,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962015927] [2021-07-13 20:46:14,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962015927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:14,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894366059] [2021-07-13 20:46:14,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:14,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:14,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:14,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894366059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:14,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:14,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:46:14,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493349314] [2021-07-13 20:46:14,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:46:14,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:46:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:46:14,337 INFO L87 Difference]: Start difference. First operand 94237 states and 276091 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:15,232 INFO L93 Difference]: Finished difference Result 99928 states and 292882 transitions. [2021-07-13 20:46:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:46:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:15,491 INFO L225 Difference]: With dead ends: 99928 [2021-07-13 20:46:15,491 INFO L226 Difference]: Without dead ends: 99838 [2021-07-13 20:46:15,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:46:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99838 states. [2021-07-13 20:46:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99838 to 98587. [2021-07-13 20:46:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98587 states, 98586 states have (on average 2.9346560363540464) internal successors, (289316), 98586 states have internal predecessors, (289316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98587 states to 98587 states and 289316 transitions. [2021-07-13 20:46:17,988 INFO L78 Accepts]: Start accepts. Automaton has 98587 states and 289316 transitions. Word has length 40 [2021-07-13 20:46:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:17,988 INFO L482 AbstractCegarLoop]: Abstraction has 98587 states and 289316 transitions. [2021-07-13 20:46:17,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 98587 states and 289316 transitions. [2021-07-13 20:46:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:18,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:18,159 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:18,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:18,359 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:18,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1023565662, now seen corresponding path program 165 times [2021-07-13 20:46:18,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:18,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926167138] [2021-07-13 20:46:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:18,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:18,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926167138] [2021-07-13 20:46:18,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926167138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:18,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859945797] [2021-07-13 20:46:18,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:18,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:46:18,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:18,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859945797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:18,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:18,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:46:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379826098] [2021-07-13 20:46:18,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:46:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:46:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:46:18,684 INFO L87 Difference]: Start difference. First operand 98587 states and 289316 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:19,640 INFO L93 Difference]: Finished difference Result 99895 states and 292803 transitions. [2021-07-13 20:46:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:46:19,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:19,942 INFO L225 Difference]: With dead ends: 99895 [2021-07-13 20:46:19,942 INFO L226 Difference]: Without dead ends: 99779 [2021-07-13 20:46:19,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:46:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99779 states. [2021-07-13 20:46:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99779 to 98497. [2021-07-13 20:46:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98497 states, 98496 states have (on average 2.9330835769980506) internal successors, (288897), 98496 states have internal predecessors, (288897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98497 states to 98497 states and 288897 transitions. [2021-07-13 20:46:22,474 INFO L78 Accepts]: Start accepts. Automaton has 98497 states and 288897 transitions. Word has length 40 [2021-07-13 20:46:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:22,474 INFO L482 AbstractCegarLoop]: Abstraction has 98497 states and 288897 transitions. [2021-07-13 20:46:22,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 98497 states and 288897 transitions. [2021-07-13 20:46:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:22,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:22,636 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:22,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-07-13 20:46:22,837 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash -879278080, now seen corresponding path program 166 times [2021-07-13 20:46:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:22,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380825716] [2021-07-13 20:46:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:22,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:22,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380825716] [2021-07-13 20:46:22,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380825716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:22,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137715474] [2021-07-13 20:46:22,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:22,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:22,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:22,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:23,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137715474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:23,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:23,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-13 20:46:23,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147425064] [2021-07-13 20:46:23,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:46:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:46:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:46:23,144 INFO L87 Difference]: Start difference. First operand 98497 states and 288897 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:24,072 INFO L93 Difference]: Finished difference Result 99374 states and 291029 transitions. [2021-07-13 20:46:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:46:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:24,335 INFO L225 Difference]: With dead ends: 99374 [2021-07-13 20:46:24,335 INFO L226 Difference]: Without dead ends: 99243 [2021-07-13 20:46:24,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:46:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99243 states. [2021-07-13 20:46:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99243 to 98493. [2021-07-13 20:46:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98493 states, 98492 states have (on average 2.9323295293018723) internal successors, (288811), 98492 states have internal predecessors, (288811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98493 states to 98493 states and 288811 transitions. [2021-07-13 20:46:26,675 INFO L78 Accepts]: Start accepts. Automaton has 98493 states and 288811 transitions. Word has length 40 [2021-07-13 20:46:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:26,675 INFO L482 AbstractCegarLoop]: Abstraction has 98493 states and 288811 transitions. [2021-07-13 20:46:26,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 98493 states and 288811 transitions. [2021-07-13 20:46:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:26,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:26,834 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:27,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-13 20:46:27,035 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash 120157120, now seen corresponding path program 167 times [2021-07-13 20:46:27,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:27,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354105286] [2021-07-13 20:46:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:27,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:27,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354105286] [2021-07-13 20:46:27,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354105286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:27,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141340337] [2021-07-13 20:46:27,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:27,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:46:27,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:27,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:27,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141340337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:27,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:27,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:46:27,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101664917] [2021-07-13 20:46:27,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:46:27,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:27,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:46:27,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:46:27,708 INFO L87 Difference]: Start difference. First operand 98493 states and 288811 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:28,626 INFO L93 Difference]: Finished difference Result 99125 states and 290256 transitions. [2021-07-13 20:46:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:46:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:28,926 INFO L225 Difference]: With dead ends: 99125 [2021-07-13 20:46:28,926 INFO L226 Difference]: Without dead ends: 98995 [2021-07-13 20:46:28,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 623.0ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:46:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98995 states. [2021-07-13 20:46:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98995 to 93823. [2021-07-13 20:46:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93823 states, 93822 states have (on average 2.9327023512608985) internal successors, (275152), 93822 states have internal predecessors, (275152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93823 states to 93823 states and 275152 transitions. [2021-07-13 20:46:31,217 INFO L78 Accepts]: Start accepts. Automaton has 93823 states and 275152 transitions. Word has length 40 [2021-07-13 20:46:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:31,217 INFO L482 AbstractCegarLoop]: Abstraction has 93823 states and 275152 transitions. [2021-07-13 20:46:31,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 93823 states and 275152 transitions. [2021-07-13 20:46:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:31,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:31,367 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:31,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-13 20:46:31,568 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:31,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1697320784, now seen corresponding path program 168 times [2021-07-13 20:46:31,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:31,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432823885] [2021-07-13 20:46:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:31,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:31,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432823885] [2021-07-13 20:46:31,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432823885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:31,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489801821] [2021-07-13 20:46:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:31,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:46:31,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:31,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:31,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489801821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:31,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:31,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:46:31,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683078938] [2021-07-13 20:46:31,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:46:31,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:46:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:46:31,930 INFO L87 Difference]: Start difference. First operand 93823 states and 275152 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:32,868 INFO L93 Difference]: Finished difference Result 101417 states and 297098 transitions. [2021-07-13 20:46:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:46:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:33,138 INFO L225 Difference]: With dead ends: 101417 [2021-07-13 20:46:33,138 INFO L226 Difference]: Without dead ends: 101305 [2021-07-13 20:46:33,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:46:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101305 states. [2021-07-13 20:46:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101305 to 96549. [2021-07-13 20:46:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96549 states, 96548 states have (on average 2.9319613042217343) internal successors, (283075), 96548 states have internal predecessors, (283075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96549 states to 96549 states and 283075 transitions. [2021-07-13 20:46:35,432 INFO L78 Accepts]: Start accepts. Automaton has 96549 states and 283075 transitions. Word has length 40 [2021-07-13 20:46:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:35,432 INFO L482 AbstractCegarLoop]: Abstraction has 96549 states and 283075 transitions. [2021-07-13 20:46:35,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 96549 states and 283075 transitions. [2021-07-13 20:46:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:35,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:35,620 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:35,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:35,820 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1028908800, now seen corresponding path program 169 times [2021-07-13 20:46:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:35,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469156450] [2021-07-13 20:46:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:35,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469156450] [2021-07-13 20:46:35,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469156450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888880206] [2021-07-13 20:46:35,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:35,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:35,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:36,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888880206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:36,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:36,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-13 20:46:36,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436285496] [2021-07-13 20:46:36,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:46:36,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:36,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:46:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:46:36,447 INFO L87 Difference]: Start difference. First operand 96549 states and 283075 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:37,282 INFO L93 Difference]: Finished difference Result 102071 states and 299053 transitions. [2021-07-13 20:46:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:46:37,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:37,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:37,590 INFO L225 Difference]: With dead ends: 102071 [2021-07-13 20:46:37,591 INFO L226 Difference]: Without dead ends: 101927 [2021-07-13 20:46:37,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101927 states. [2021-07-13 20:46:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101927 to 93109. [2021-07-13 20:46:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93109 states, 93108 states have (on average 2.9334858443957557) internal successors, (273131), 93108 states have internal predecessors, (273131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93109 states to 93109 states and 273131 transitions. [2021-07-13 20:46:39,722 INFO L78 Accepts]: Start accepts. Automaton has 93109 states and 273131 transitions. Word has length 40 [2021-07-13 20:46:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:39,722 INFO L482 AbstractCegarLoop]: Abstraction has 93109 states and 273131 transitions. [2021-07-13 20:46:39,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 93109 states and 273131 transitions. [2021-07-13 20:46:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:40,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:40,174 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:40,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:40,374 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:40,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:40,375 INFO L82 PathProgramCache]: Analyzing trace with hash -515432806, now seen corresponding path program 170 times [2021-07-13 20:46:40,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:40,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879200267] [2021-07-13 20:46:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:40,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:40,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879200267] [2021-07-13 20:46:40,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879200267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:40,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339145507] [2021-07-13 20:46:40,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:40,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:40,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:40,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339145507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:40,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:40,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 20:46:40,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297310137] [2021-07-13 20:46:40,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:46:40,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:40,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:46:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:46:40,690 INFO L87 Difference]: Start difference. First operand 93109 states and 273131 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:41,455 INFO L93 Difference]: Finished difference Result 95353 states and 279532 transitions. [2021-07-13 20:46:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:46:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:41,705 INFO L225 Difference]: With dead ends: 95353 [2021-07-13 20:46:41,705 INFO L226 Difference]: Without dead ends: 95239 [2021-07-13 20:46:41,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:46:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95239 states. [2021-07-13 20:46:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95239 to 83973. [2021-07-13 20:46:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83973 states, 83972 states have (on average 2.9373719811365695) internal successors, (246657), 83972 states have internal predecessors, (246657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83973 states to 83973 states and 246657 transitions. [2021-07-13 20:46:43,611 INFO L78 Accepts]: Start accepts. Automaton has 83973 states and 246657 transitions. Word has length 40 [2021-07-13 20:46:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:43,612 INFO L482 AbstractCegarLoop]: Abstraction has 83973 states and 246657 transitions. [2021-07-13 20:46:43,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 83973 states and 246657 transitions. [2021-07-13 20:46:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:43,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:43,763 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:43,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:43,963 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2055642432, now seen corresponding path program 171 times [2021-07-13 20:46:43,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:43,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113207824] [2021-07-13 20:46:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:44,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:44,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113207824] [2021-07-13 20:46:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113207824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:44,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199543525] [2021-07-13 20:46:44,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:44,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:46:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:44,390 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:46:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:44,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199543525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:44,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:44,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-07-13 20:46:44,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884638499] [2021-07-13 20:46:44,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:46:44,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:44,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:46:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:46:44,566 INFO L87 Difference]: Start difference. First operand 83973 states and 246657 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:45,130 INFO L93 Difference]: Finished difference Result 92657 states and 272233 transitions. [2021-07-13 20:46:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:46:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:45,587 INFO L225 Difference]: With dead ends: 92657 [2021-07-13 20:46:45,587 INFO L226 Difference]: Without dead ends: 92575 [2021-07-13 20:46:45,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:46:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92575 states. [2021-07-13 20:46:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92575 to 91989. [2021-07-13 20:46:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91989 states, 91988 states have (on average 2.940437883202157) internal successors, (270485), 91988 states have internal predecessors, (270485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91989 states to 91989 states and 270485 transitions. [2021-07-13 20:46:47,613 INFO L78 Accepts]: Start accepts. Automaton has 91989 states and 270485 transitions. Word has length 40 [2021-07-13 20:46:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:47,613 INFO L482 AbstractCegarLoop]: Abstraction has 91989 states and 270485 transitions. [2021-07-13 20:46:47,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 91989 states and 270485 transitions. [2021-07-13 20:46:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:47,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:47,772 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:47,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-13 20:46:47,973 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1936559420, now seen corresponding path program 172 times [2021-07-13 20:46:47,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:47,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287101416] [2021-07-13 20:46:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:48,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:48,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287101416] [2021-07-13 20:46:48,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287101416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:48,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029858190] [2021-07-13 20:46:48,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:48,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:48,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:48,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:48,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:48,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029858190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:48,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:48,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-07-13 20:46:48,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980583951] [2021-07-13 20:46:48,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:46:48,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:46:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:46:48,557 INFO L87 Difference]: Start difference. First operand 91989 states and 270485 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:49,107 INFO L93 Difference]: Finished difference Result 92644 states and 272206 transitions. [2021-07-13 20:46:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:46:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:49,535 INFO L225 Difference]: With dead ends: 92644 [2021-07-13 20:46:49,535 INFO L226 Difference]: Without dead ends: 92532 [2021-07-13 20:46:49,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:46:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92532 states. [2021-07-13 20:46:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92532 to 83369. [2021-07-13 20:46:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83369 states, 83368 states have (on average 2.939893004510124) internal successors, (245093), 83368 states have internal predecessors, (245093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83369 states to 83369 states and 245093 transitions. [2021-07-13 20:46:51,488 INFO L78 Accepts]: Start accepts. Automaton has 83369 states and 245093 transitions. Word has length 40 [2021-07-13 20:46:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:51,488 INFO L482 AbstractCegarLoop]: Abstraction has 83369 states and 245093 transitions. [2021-07-13 20:46:51,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 83369 states and 245093 transitions. [2021-07-13 20:46:51,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:51,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:51,625 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:51,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-07-13 20:46:51,825 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:51,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:51,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2080847002, now seen corresponding path program 173 times [2021-07-13 20:46:51,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:51,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860618255] [2021-07-13 20:46:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:51,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:51,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860618255] [2021-07-13 20:46:51,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860618255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:51,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878401336] [2021-07-13 20:46:51,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:51,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:46:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:51,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:51,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:52,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878401336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:52,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:52,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 20:46:52,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914098082] [2021-07-13 20:46:52,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:46:52,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:46:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:46:52,137 INFO L87 Difference]: Start difference. First operand 83369 states and 245093 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:52,977 INFO L93 Difference]: Finished difference Result 92501 states and 271590 transitions. [2021-07-13 20:46:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:46:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:53,221 INFO L225 Difference]: With dead ends: 92501 [2021-07-13 20:46:53,221 INFO L226 Difference]: Without dead ends: 92370 [2021-07-13 20:46:53,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:46:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92370 states. [2021-07-13 20:46:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92370 to 91907. [2021-07-13 20:46:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91907 states, 91906 states have (on average 2.9393075533697473) internal successors, (270140), 91906 states have internal predecessors, (270140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91907 states to 91907 states and 270140 transitions. [2021-07-13 20:46:55,575 INFO L78 Accepts]: Start accepts. Automaton has 91907 states and 270140 transitions. Word has length 40 [2021-07-13 20:46:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:55,575 INFO L482 AbstractCegarLoop]: Abstraction has 91907 states and 270140 transitions. [2021-07-13 20:46:55,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 91907 states and 270140 transitions. [2021-07-13 20:46:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:46:55,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:55,739 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:55,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:55,940 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1214685094, now seen corresponding path program 174 times [2021-07-13 20:46:55,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:55,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151948070] [2021-07-13 20:46:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:46:56,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151948070] [2021-07-13 20:46:56,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151948070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616812620] [2021-07-13 20:46:56,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:56,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:46:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:46:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:56,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616812620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:56,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:56,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-07-13 20:46:56,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778158062] [2021-07-13 20:46:56,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:46:56,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:56,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:46:56,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:46:56,305 INFO L87 Difference]: Start difference. First operand 91907 states and 270140 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:57,356 INFO L93 Difference]: Finished difference Result 92518 states and 271508 transitions. [2021-07-13 20:46:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:46:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:46:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:57,611 INFO L225 Difference]: With dead ends: 92518 [2021-07-13 20:46:57,611 INFO L226 Difference]: Without dead ends: 92388 [2021-07-13 20:46:57,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:46:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92388 states. [2021-07-13 20:46:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92388 to 91897. [2021-07-13 20:46:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91897 states, 91896 states have (on average 2.9392465395664664) internal successors, (270105), 91896 states have internal predecessors, (270105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91897 states to 91897 states and 270105 transitions. [2021-07-13 20:47:00,080 INFO L78 Accepts]: Start accepts. Automaton has 91897 states and 270105 transitions. Word has length 40 [2021-07-13 20:47:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:00,080 INFO L482 AbstractCegarLoop]: Abstraction has 91897 states and 270105 transitions. [2021-07-13 20:47:00,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 91897 states and 270105 transitions. [2021-07-13 20:47:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:47:00,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:00,249 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:00,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-07-13 20:47:00,453 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 246062234, now seen corresponding path program 175 times [2021-07-13 20:47:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:00,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150794057] [2021-07-13 20:47:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:00,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:00,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150794057] [2021-07-13 20:47:00,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150794057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:00,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460696702] [2021-07-13 20:47:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:00,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:01,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460696702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:01,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:01,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:47:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708532518] [2021-07-13 20:47:01,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:47:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:01,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:47:01,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:47:01,112 INFO L87 Difference]: Start difference. First operand 91897 states and 270105 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:01,793 INFO L93 Difference]: Finished difference Result 92417 states and 271269 transitions. [2021-07-13 20:47:01,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:47:01,793 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:47:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:02,220 INFO L225 Difference]: With dead ends: 92417 [2021-07-13 20:47:02,220 INFO L226 Difference]: Without dead ends: 92341 [2021-07-13 20:47:02,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:47:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92341 states. [2021-07-13 20:47:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92341 to 91891. [2021-07-13 20:47:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91891 states, 91890 states have (on average 2.939275220372184) internal successors, (270090), 91890 states have internal predecessors, (270090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91891 states to 91891 states and 270090 transitions. [2021-07-13 20:47:04,447 INFO L78 Accepts]: Start accepts. Automaton has 91891 states and 270090 transitions. Word has length 40 [2021-07-13 20:47:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:04,447 INFO L482 AbstractCegarLoop]: Abstraction has 91891 states and 270090 transitions. [2021-07-13 20:47:04,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 91891 states and 270090 transitions. [2021-07-13 20:47:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:04,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:04,616 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:04,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:04,817 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1334844944, now seen corresponding path program 176 times [2021-07-13 20:47:04,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:04,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687496352] [2021-07-13 20:47:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:04,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:04,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687496352] [2021-07-13 20:47:04,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687496352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:04,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734170122] [2021-07-13 20:47:04,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:04,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:04,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:04,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:05,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734170122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:05,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:05,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:47:05,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508090170] [2021-07-13 20:47:05,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:05,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:05,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:05,015 INFO L87 Difference]: Start difference. First operand 91891 states and 270090 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:06,336 INFO L93 Difference]: Finished difference Result 97848 states and 286052 transitions. [2021-07-13 20:47:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:47:06,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:06,581 INFO L225 Difference]: With dead ends: 97848 [2021-07-13 20:47:06,581 INFO L226 Difference]: Without dead ends: 97848 [2021-07-13 20:47:06,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:47:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97848 states. [2021-07-13 20:47:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97848 to 92417. [2021-07-13 20:47:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92417 states, 92416 states have (on average 2.9390906336565097) internal successors, (271619), 92416 states have internal predecessors, (271619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92417 states to 92417 states and 271619 transitions. [2021-07-13 20:47:08,758 INFO L78 Accepts]: Start accepts. Automaton has 92417 states and 271619 transitions. Word has length 43 [2021-07-13 20:47:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:08,758 INFO L482 AbstractCegarLoop]: Abstraction has 92417 states and 271619 transitions. [2021-07-13 20:47:08,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 92417 states and 271619 transitions. [2021-07-13 20:47:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:09,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:09,227 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:09,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:09,441 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:09,441 INFO L82 PathProgramCache]: Analyzing trace with hash 319146986, now seen corresponding path program 177 times [2021-07-13 20:47:09,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:09,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909269367] [2021-07-13 20:47:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:09,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909269367] [2021-07-13 20:47:09,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909269367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249588865] [2021-07-13 20:47:09,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:09,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:47:09,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:09,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:09,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249588865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:09,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:09,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:47:09,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317896177] [2021-07-13 20:47:09,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:09,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:09,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:09,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:09,632 INFO L87 Difference]: Start difference. First operand 92417 states and 271619 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:10,573 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2021-07-13 20:47:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:10,976 INFO L93 Difference]: Finished difference Result 129666 states and 378543 transitions. [2021-07-13 20:47:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:47:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:11,334 INFO L225 Difference]: With dead ends: 129666 [2021-07-13 20:47:11,334 INFO L226 Difference]: Without dead ends: 129474 [2021-07-13 20:47:11,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 760.2ms TimeCoverageRelationStatistics Valid=1076, Invalid=2830, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:47:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129474 states. [2021-07-13 20:47:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129474 to 99845. [2021-07-13 20:47:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99845 states, 99844 states have (on average 2.9515544249028483) internal successors, (294695), 99844 states have internal predecessors, (294695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99845 states to 99845 states and 294695 transitions. [2021-07-13 20:47:14,361 INFO L78 Accepts]: Start accepts. Automaton has 99845 states and 294695 transitions. Word has length 43 [2021-07-13 20:47:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:14,361 INFO L482 AbstractCegarLoop]: Abstraction has 99845 states and 294695 transitions. [2021-07-13 20:47:14,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 99845 states and 294695 transitions. [2021-07-13 20:47:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:14,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:14,536 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:14,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-07-13 20:47:14,736 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1197317346, now seen corresponding path program 178 times [2021-07-13 20:47:14,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:14,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826277665] [2021-07-13 20:47:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:14,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:14,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826277665] [2021-07-13 20:47:14,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826277665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:14,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929345426] [2021-07-13 20:47:14,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:14,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:14,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:14,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929345426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:14,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:14,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-07-13 20:47:14,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164067606] [2021-07-13 20:47:14,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:47:14,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:47:14,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:47:14,922 INFO L87 Difference]: Start difference. First operand 99845 states and 294695 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:16,657 INFO L93 Difference]: Finished difference Result 150686 states and 439309 transitions. [2021-07-13 20:47:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:47:16,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:16,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:17,096 INFO L225 Difference]: With dead ends: 150686 [2021-07-13 20:47:17,096 INFO L226 Difference]: Without dead ends: 150658 [2021-07-13 20:47:17,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:47:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150658 states. [2021-07-13 20:47:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150658 to 113888. [2021-07-13 20:47:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113888 states, 113887 states have (on average 2.937367741708887) internal successors, (334528), 113887 states have internal predecessors, (334528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113888 states to 113888 states and 334528 transitions. [2021-07-13 20:47:20,763 INFO L78 Accepts]: Start accepts. Automaton has 113888 states and 334528 transitions. Word has length 43 [2021-07-13 20:47:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:20,763 INFO L482 AbstractCegarLoop]: Abstraction has 113888 states and 334528 transitions. [2021-07-13 20:47:20,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 113888 states and 334528 transitions. [2021-07-13 20:47:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:20,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:20,971 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:21,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:21,172 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 820346192, now seen corresponding path program 179 times [2021-07-13 20:47:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:21,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606915777] [2021-07-13 20:47:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:21,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:21,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606915777] [2021-07-13 20:47:21,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606915777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:21,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466444143] [2021-07-13 20:47:21,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:21,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:47:21,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:21,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:21,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466444143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:21,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:21,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-07-13 20:47:21,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40906061] [2021-07-13 20:47:21,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:47:21,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:47:21,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:47:21,352 INFO L87 Difference]: Start difference. First operand 113888 states and 334528 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:22,418 INFO L93 Difference]: Finished difference Result 116088 states and 339832 transitions. [2021-07-13 20:47:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:47:22,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:22,781 INFO L225 Difference]: With dead ends: 116088 [2021-07-13 20:47:22,782 INFO L226 Difference]: Without dead ends: 116074 [2021-07-13 20:47:22,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1113, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:47:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116074 states. [2021-07-13 20:47:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116074 to 113400. [2021-07-13 20:47:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113400 states, 113399 states have (on average 2.9388795315655343) internal successors, (333266), 113399 states have internal predecessors, (333266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113400 states to 113400 states and 333266 transitions. [2021-07-13 20:47:25,813 INFO L78 Accepts]: Start accepts. Automaton has 113400 states and 333266 transitions. Word has length 43 [2021-07-13 20:47:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:25,813 INFO L482 AbstractCegarLoop]: Abstraction has 113400 states and 333266 transitions. [2021-07-13 20:47:25,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 113400 states and 333266 transitions. [2021-07-13 20:47:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:26,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:26,039 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:26,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-07-13 20:47:26,240 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:26,240 INFO L82 PathProgramCache]: Analyzing trace with hash 144141704, now seen corresponding path program 180 times [2021-07-13 20:47:26,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:26,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399711772] [2021-07-13 20:47:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:47:26,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:26,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399711772] [2021-07-13 20:47:26,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399711772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:26,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971748902] [2021-07-13 20:47:26,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:26,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:47:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:26,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971748902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:26,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:26,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-07-13 20:47:26,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855888236] [2021-07-13 20:47:26,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:47:26,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:26,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:47:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:47:26,401 INFO L87 Difference]: Start difference. First operand 113400 states and 333266 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:27,139 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:47:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:27,832 INFO L93 Difference]: Finished difference Result 135054 states and 395293 transitions. [2021-07-13 20:47:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:47:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:28,453 INFO L225 Difference]: With dead ends: 135054 [2021-07-13 20:47:28,453 INFO L226 Difference]: Without dead ends: 135018 [2021-07-13 20:47:28,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=896, Invalid=2184, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:47:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135018 states. [2021-07-13 20:47:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135018 to 120222. [2021-07-13 20:47:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120222 states, 120221 states have (on average 2.944319212117683) internal successors, (353969), 120221 states have internal predecessors, (353969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120222 states to 120222 states and 353969 transitions. [2021-07-13 20:47:31,919 INFO L78 Accepts]: Start accepts. Automaton has 120222 states and 353969 transitions. Word has length 43 [2021-07-13 20:47:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:31,919 INFO L482 AbstractCegarLoop]: Abstraction has 120222 states and 353969 transitions. [2021-07-13 20:47:31,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 120222 states and 353969 transitions. [2021-07-13 20:47:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:32,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:32,147 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:32,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-07-13 20:47:32,347 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:32,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash 580321142, now seen corresponding path program 181 times [2021-07-13 20:47:32,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:32,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492018431] [2021-07-13 20:47:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:32,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492018431] [2021-07-13 20:47:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492018431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848468905] [2021-07-13 20:47:32,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:32,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848468905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:32,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:32,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 20:47:32,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16887318] [2021-07-13 20:47:32,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:32,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:32,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:32,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:32,845 INFO L87 Difference]: Start difference. First operand 120222 states and 353969 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:33,915 INFO L93 Difference]: Finished difference Result 126290 states and 369954 transitions. [2021-07-13 20:47:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:47:33,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:34,281 INFO L225 Difference]: With dead ends: 126290 [2021-07-13 20:47:34,282 INFO L226 Difference]: Without dead ends: 126227 [2021-07-13 20:47:34,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:47:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126227 states. [2021-07-13 20:47:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126227 to 120486. [2021-07-13 20:47:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120486 states, 120485 states have (on average 2.943295845955928) internal successors, (354623), 120485 states have internal predecessors, (354623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120486 states to 120486 states and 354623 transitions. [2021-07-13 20:47:37,488 INFO L78 Accepts]: Start accepts. Automaton has 120486 states and 354623 transitions. Word has length 43 [2021-07-13 20:47:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:37,488 INFO L482 AbstractCegarLoop]: Abstraction has 120486 states and 354623 transitions. [2021-07-13 20:47:37,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 120486 states and 354623 transitions. [2021-07-13 20:47:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:37,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:37,706 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:37,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-07-13 20:47:37,907 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:37,907 INFO L82 PathProgramCache]: Analyzing trace with hash -76450608, now seen corresponding path program 182 times [2021-07-13 20:47:37,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:37,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845847109] [2021-07-13 20:47:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:37,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:37,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845847109] [2021-07-13 20:47:37,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845847109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:37,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524629769] [2021-07-13 20:47:37,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:37,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:37,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:37,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:38,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524629769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:38,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:38,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:47:38,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352525372] [2021-07-13 20:47:38,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:38,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:38,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:38,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:38,087 INFO L87 Difference]: Start difference. First operand 120486 states and 354623 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:39,443 INFO L93 Difference]: Finished difference Result 133258 states and 390223 transitions. [2021-07-13 20:47:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:47:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:39,808 INFO L225 Difference]: With dead ends: 133258 [2021-07-13 20:47:39,808 INFO L226 Difference]: Without dead ends: 133132 [2021-07-13 20:47:39,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=483, Invalid=1497, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:47:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133132 states. [2021-07-13 20:47:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133132 to 118852. [2021-07-13 20:47:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118852 states, 118851 states have (on average 2.9420198399676907) internal successors, (349662), 118851 states have internal predecessors, (349662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118852 states to 118852 states and 349662 transitions. [2021-07-13 20:47:43,053 INFO L78 Accepts]: Start accepts. Automaton has 118852 states and 349662 transitions. Word has length 43 [2021-07-13 20:47:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:43,053 INFO L482 AbstractCegarLoop]: Abstraction has 118852 states and 349662 transitions. [2021-07-13 20:47:43,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 118852 states and 349662 transitions. [2021-07-13 20:47:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:43,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:43,273 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:43,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:43,473 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1121365150, now seen corresponding path program 183 times [2021-07-13 20:47:43,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:43,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355727710] [2021-07-13 20:47:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:43,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:43,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355727710] [2021-07-13 20:47:43,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355727710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:43,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563283034] [2021-07-13 20:47:43,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:43,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:47:43,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:43,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:43,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:43,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563283034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:43,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:43,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:47:43,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252152716] [2021-07-13 20:47:43,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:43,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:43,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:43,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:43,652 INFO L87 Difference]: Start difference. First operand 118852 states and 349662 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:45,132 INFO L93 Difference]: Finished difference Result 127445 states and 371169 transitions. [2021-07-13 20:47:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:47:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:45,494 INFO L225 Difference]: With dead ends: 127445 [2021-07-13 20:47:45,494 INFO L226 Difference]: Without dead ends: 127445 [2021-07-13 20:47:45,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=560, Invalid=1602, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:47:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127445 states. [2021-07-13 20:47:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127445 to 114630. [2021-07-13 20:47:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114630 states, 114629 states have (on average 2.940416474016174) internal successors, (337057), 114629 states have internal predecessors, (337057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114630 states to 114630 states and 337057 transitions. [2021-07-13 20:47:48,239 INFO L78 Accepts]: Start accepts. Automaton has 114630 states and 337057 transitions. Word has length 43 [2021-07-13 20:47:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:48,239 INFO L482 AbstractCegarLoop]: Abstraction has 114630 states and 337057 transitions. [2021-07-13 20:47:48,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 114630 states and 337057 transitions. [2021-07-13 20:47:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:48,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:48,848 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:49,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:49,048 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash -682096184, now seen corresponding path program 184 times [2021-07-13 20:47:49,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:49,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820678140] [2021-07-13 20:47:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:49,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:49,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820678140] [2021-07-13 20:47:49,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820678140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:49,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957324140] [2021-07-13 20:47:49,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:49,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:49,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:49,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957324140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:49,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:49,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:47:49,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861281392] [2021-07-13 20:47:49,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:49,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:49,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:49,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:49,224 INFO L87 Difference]: Start difference. First operand 114630 states and 337057 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:50,522 INFO L93 Difference]: Finished difference Result 129747 states and 377941 transitions. [2021-07-13 20:47:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:47:50,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:51,069 INFO L225 Difference]: With dead ends: 129747 [2021-07-13 20:47:51,069 INFO L226 Difference]: Without dead ends: 129639 [2021-07-13 20:47:51,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 644.4ms TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:47:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129639 states. [2021-07-13 20:47:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129639 to 113468. [2021-07-13 20:47:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113468 states, 113467 states have (on average 2.9370654022755516) internal successors, (333260), 113467 states have internal predecessors, (333260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113468 states to 113468 states and 333260 transitions. [2021-07-13 20:47:53,966 INFO L78 Accepts]: Start accepts. Automaton has 113468 states and 333260 transitions. Word has length 43 [2021-07-13 20:47:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:53,966 INFO L482 AbstractCegarLoop]: Abstraction has 113468 states and 333260 transitions. [2021-07-13 20:47:53,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 113468 states and 333260 transitions. [2021-07-13 20:47:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:47:54,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:54,519 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:54,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:54,720 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 283858644, now seen corresponding path program 185 times [2021-07-13 20:47:54,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:54,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34337160] [2021-07-13 20:47:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:47:54,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:54,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34337160] [2021-07-13 20:47:54,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34337160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:54,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955941108] [2021-07-13 20:47:54,752 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 [2021-07-13 20:47:54,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:47:54,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:47:54,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:54,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955941108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:54,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:54,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 20:47:54,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823278632] [2021-07-13 20:47:54,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:54,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:54,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:54,888 INFO L87 Difference]: Start difference. First operand 113468 states and 333260 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:56,117 INFO L93 Difference]: Finished difference Result 128314 states and 373004 transitions. [2021-07-13 20:47:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:47:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:47:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:56,510 INFO L225 Difference]: With dead ends: 128314 [2021-07-13 20:47:56,510 INFO L226 Difference]: Without dead ends: 128314 [2021-07-13 20:47:56,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1486, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:47:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128314 states. [2021-07-13 20:47:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128314 to 115798. [2021-07-13 20:47:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115798 states, 115797 states have (on average 2.9308617667124364) internal successors, (339385), 115797 states have internal predecessors, (339385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115798 states to 115798 states and 339385 transitions. [2021-07-13 20:47:59,763 INFO L78 Accepts]: Start accepts. Automaton has 115798 states and 339385 transitions. Word has length 43 [2021-07-13 20:47:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:59,763 INFO L482 AbstractCegarLoop]: Abstraction has 115798 states and 339385 transitions. [2021-07-13 20:47:59,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 115798 states and 339385 transitions. [2021-07-13 20:48:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:00,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:00,341 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:00,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:00,549 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1644619286, now seen corresponding path program 186 times [2021-07-13 20:48:00,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:00,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410822218] [2021-07-13 20:48:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:48:00,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:00,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410822218] [2021-07-13 20:48:00,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410822218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:00,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168688041] [2021-07-13 20:48:00,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:00,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:48:00,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:00,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168688041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:00,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:00,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 20:48:00,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721308419] [2021-07-13 20:48:00,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:00,720 INFO L87 Difference]: Start difference. First operand 115798 states and 339385 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:01,937 INFO L93 Difference]: Finished difference Result 129796 states and 378862 transitions. [2021-07-13 20:48:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:48:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:02,299 INFO L225 Difference]: With dead ends: 129796 [2021-07-13 20:48:02,299 INFO L226 Difference]: Without dead ends: 129748 [2021-07-13 20:48:02,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=647, Invalid=1803, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:48:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129748 states. [2021-07-13 20:48:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129748 to 121924. [2021-07-13 20:48:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121924 states, 121923 states have (on average 2.93609901331168) internal successors, (357978), 121923 states have internal predecessors, (357978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121924 states to 121924 states and 357978 transitions. [2021-07-13 20:48:05,555 INFO L78 Accepts]: Start accepts. Automaton has 121924 states and 357978 transitions. Word has length 43 [2021-07-13 20:48:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:05,556 INFO L482 AbstractCegarLoop]: Abstraction has 121924 states and 357978 transitions. [2021-07-13 20:48:05,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 121924 states and 357978 transitions. [2021-07-13 20:48:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:06,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:06,142 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:06,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2021-07-13 20:48:06,349 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1232324702, now seen corresponding path program 187 times [2021-07-13 20:48:06,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:06,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878096012] [2021-07-13 20:48:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:06,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:06,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878096012] [2021-07-13 20:48:06,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878096012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:06,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20248906] [2021-07-13 20:48:06,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:06,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:06,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20248906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:06,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:06,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-07-13 20:48:06,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52243580] [2021-07-13 20:48:06,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:06,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:06,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:06,507 INFO L87 Difference]: Start difference. First operand 121924 states and 357978 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:07,809 INFO L93 Difference]: Finished difference Result 146262 states and 426737 transitions. [2021-07-13 20:48:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:48:07,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:08,259 INFO L225 Difference]: With dead ends: 146262 [2021-07-13 20:48:08,259 INFO L226 Difference]: Without dead ends: 146262 [2021-07-13 20:48:08,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=667, Invalid=1589, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:48:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146262 states. [2021-07-13 20:48:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146262 to 140484. [2021-07-13 20:48:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140484 states, 140483 states have (on average 2.933878120484329) internal successors, (412160), 140483 states have internal predecessors, (412160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140484 states to 140484 states and 412160 transitions. [2021-07-13 20:48:12,008 INFO L78 Accepts]: Start accepts. Automaton has 140484 states and 412160 transitions. Word has length 43 [2021-07-13 20:48:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:12,008 INFO L482 AbstractCegarLoop]: Abstraction has 140484 states and 412160 transitions. [2021-07-13 20:48:12,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 140484 states and 412160 transitions. [2021-07-13 20:48:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:12,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:12,627 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:12,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:12,827 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:12,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1373408320, now seen corresponding path program 188 times [2021-07-13 20:48:12,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:12,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491000442] [2021-07-13 20:48:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:12,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:12,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491000442] [2021-07-13 20:48:12,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491000442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:12,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931070403] [2021-07-13 20:48:12,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:12,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:12,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:12,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:12,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931070403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:12,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:12,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-07-13 20:48:12,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186072413] [2021-07-13 20:48:12,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:12,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:12,981 INFO L87 Difference]: Start difference. First operand 140484 states and 412160 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:14,132 INFO L93 Difference]: Finished difference Result 145663 states and 425103 transitions. [2021-07-13 20:48:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:48:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:14,552 INFO L225 Difference]: With dead ends: 145663 [2021-07-13 20:48:14,552 INFO L226 Difference]: Without dead ends: 145649 [2021-07-13 20:48:14,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=351, Invalid=909, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:48:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145649 states. [2021-07-13 20:48:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145649 to 139756. [2021-07-13 20:48:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139756 states, 139755 states have (on average 2.9336195484955816) internal successors, (409988), 139755 states have internal predecessors, (409988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:18,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139756 states to 139756 states and 409988 transitions. [2021-07-13 20:48:18,400 INFO L78 Accepts]: Start accepts. Automaton has 139756 states and 409988 transitions. Word has length 43 [2021-07-13 20:48:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:18,401 INFO L482 AbstractCegarLoop]: Abstraction has 139756 states and 409988 transitions. [2021-07-13 20:48:18,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 139756 states and 409988 transitions. [2021-07-13 20:48:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:18,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:18,664 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:18,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:18,864 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:18,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1457807094, now seen corresponding path program 189 times [2021-07-13 20:48:18,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:18,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358560671] [2021-07-13 20:48:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:18,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:18,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358560671] [2021-07-13 20:48:18,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358560671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:18,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405337567] [2021-07-13 20:48:18,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:18,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:48:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:18,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:19,344 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 20:48:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:19,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405337567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:19,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:19,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-07-13 20:48:19,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915561977] [2021-07-13 20:48:19,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:19,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:19,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:19,370 INFO L87 Difference]: Start difference. First operand 139756 states and 409988 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:20,510 INFO L93 Difference]: Finished difference Result 149208 states and 435292 transitions. [2021-07-13 20:48:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:48:20,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:20,937 INFO L225 Difference]: With dead ends: 149208 [2021-07-13 20:48:20,937 INFO L226 Difference]: Without dead ends: 149152 [2021-07-13 20:48:20,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:48:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149152 states. [2021-07-13 20:48:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149152 to 143792. [2021-07-13 20:48:24,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143792 states, 143791 states have (on average 2.9304198454701615) internal successors, (421368), 143791 states have internal predecessors, (421368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143792 states to 143792 states and 421368 transitions. [2021-07-13 20:48:24,971 INFO L78 Accepts]: Start accepts. Automaton has 143792 states and 421368 transitions. Word has length 43 [2021-07-13 20:48:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:24,971 INFO L482 AbstractCegarLoop]: Abstraction has 143792 states and 421368 transitions. [2021-07-13 20:48:24,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 143792 states and 421368 transitions. [2021-07-13 20:48:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:25,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:25,229 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:25,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-07-13 20:48:25,429 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1197122692, now seen corresponding path program 190 times [2021-07-13 20:48:25,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:25,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471453152] [2021-07-13 20:48:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:48:25,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:25,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471453152] [2021-07-13 20:48:25,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471453152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:25,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366922041] [2021-07-13 20:48:25,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:25,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:25,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:25,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:25,866 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:48:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366922041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:25,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:25,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:48:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632942269] [2021-07-13 20:48:25,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:25,957 INFO L87 Difference]: Start difference. First operand 143792 states and 421368 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:27,151 INFO L93 Difference]: Finished difference Result 157678 states and 458911 transitions. [2021-07-13 20:48:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:48:27,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:27,911 INFO L225 Difference]: With dead ends: 157678 [2021-07-13 20:48:27,911 INFO L226 Difference]: Without dead ends: 157580 [2021-07-13 20:48:27,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=427, Invalid=1295, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:48:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157580 states. [2021-07-13 20:48:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157580 to 151704. [2021-07-13 20:48:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151704 states, 151703 states have (on average 2.927021878275314) internal successors, (444038), 151703 states have internal predecessors, (444038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151704 states to 151704 states and 444038 transitions. [2021-07-13 20:48:31,890 INFO L78 Accepts]: Start accepts. Automaton has 151704 states and 444038 transitions. Word has length 43 [2021-07-13 20:48:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:31,890 INFO L482 AbstractCegarLoop]: Abstraction has 151704 states and 444038 transitions. [2021-07-13 20:48:31,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 151704 states and 444038 transitions. [2021-07-13 20:48:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:32,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:32,138 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:32,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-07-13 20:48:32,339 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:32,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1907345718, now seen corresponding path program 191 times [2021-07-13 20:48:32,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:32,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910731911] [2021-07-13 20:48:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:32,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:32,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910731911] [2021-07-13 20:48:32,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910731911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:32,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440544139] [2021-07-13 20:48:32,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:48:32,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:48:32,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:32,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:32,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:32,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440544139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:32,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:32,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:48:32,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793197002] [2021-07-13 20:48:32,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:48:32,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:48:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:48:32,541 INFO L87 Difference]: Start difference. First operand 151704 states and 444038 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:34,083 INFO L93 Difference]: Finished difference Result 160874 states and 468779 transitions. [2021-07-13 20:48:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:48:34,083 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:34,602 INFO L225 Difference]: With dead ends: 160874 [2021-07-13 20:48:34,602 INFO L226 Difference]: Without dead ends: 160734 [2021-07-13 20:48:34,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1704, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:48:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160734 states. [2021-07-13 20:48:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160734 to 155359. [2021-07-13 20:48:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155359 states, 155358 states have (on average 2.929176482704463) internal successors, (455071), 155358 states have internal predecessors, (455071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155359 states to 155359 states and 455071 transitions. [2021-07-13 20:48:38,560 INFO L78 Accepts]: Start accepts. Automaton has 155359 states and 455071 transitions. Word has length 43 [2021-07-13 20:48:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:38,560 INFO L482 AbstractCegarLoop]: Abstraction has 155359 states and 455071 transitions. [2021-07-13 20:48:38,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 155359 states and 455071 transitions. [2021-07-13 20:48:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:39,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:39,211 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:39,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-07-13 20:48:39,411 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2058606088, now seen corresponding path program 192 times [2021-07-13 20:48:39,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:39,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767365611] [2021-07-13 20:48:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:39,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:39,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767365611] [2021-07-13 20:48:39,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767365611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:39,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840277218] [2021-07-13 20:48:39,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:39,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:48:39,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:39,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:39,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:39,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840277218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:39,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:39,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:48:39,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718460530] [2021-07-13 20:48:39,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:39,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:39,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:39,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:39,618 INFO L87 Difference]: Start difference. First operand 155359 states and 455071 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:40,961 INFO L93 Difference]: Finished difference Result 163387 states and 475234 transitions. [2021-07-13 20:48:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:48:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:41,697 INFO L225 Difference]: With dead ends: 163387 [2021-07-13 20:48:41,697 INFO L226 Difference]: Without dead ends: 163387 [2021-07-13 20:48:41,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=673, Invalid=1979, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:48:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163387 states. [2021-07-13 20:48:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163387 to 154407. [2021-07-13 20:48:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154407 states, 154406 states have (on average 2.9276388223255574) internal successors, (452045), 154406 states have internal predecessors, (452045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154407 states to 154407 states and 452045 transitions. [2021-07-13 20:48:45,900 INFO L78 Accepts]: Start accepts. Automaton has 154407 states and 452045 transitions. Word has length 43 [2021-07-13 20:48:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:45,901 INFO L482 AbstractCegarLoop]: Abstraction has 154407 states and 452045 transitions. [2021-07-13 20:48:45,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 154407 states and 452045 transitions. [2021-07-13 20:48:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:46,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:46,158 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:46,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:46,358 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash 255144754, now seen corresponding path program 193 times [2021-07-13 20:48:46,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:46,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820106] [2021-07-13 20:48:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:46,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:46,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820106] [2021-07-13 20:48:46,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:46,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749773201] [2021-07-13 20:48:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:46,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:46,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:46,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749773201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:46,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:46,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:48:46,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593590956] [2021-07-13 20:48:46,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:46,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:46,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:46,895 INFO L87 Difference]: Start difference. First operand 154407 states and 452045 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:48,315 INFO L93 Difference]: Finished difference Result 170169 states and 495898 transitions. [2021-07-13 20:48:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:48:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:49,053 INFO L225 Difference]: With dead ends: 170169 [2021-07-13 20:48:49,053 INFO L226 Difference]: Without dead ends: 170055 [2021-07-13 20:48:49,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:48:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170055 states. [2021-07-13 20:48:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170055 to 152595. [2021-07-13 20:48:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152595 states, 152594 states have (on average 2.9246038507411827) internal successors, (446277), 152594 states have internal predecessors, (446277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152595 states to 152595 states and 446277 transitions. [2021-07-13 20:48:53,249 INFO L78 Accepts]: Start accepts. Automaton has 152595 states and 446277 transitions. Word has length 43 [2021-07-13 20:48:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:53,249 INFO L482 AbstractCegarLoop]: Abstraction has 152595 states and 446277 transitions. [2021-07-13 20:48:53,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 152595 states and 446277 transitions. [2021-07-13 20:48:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:48:53,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:53,513 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:53,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-13 20:48:53,713 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1604506812, now seen corresponding path program 194 times [2021-07-13 20:48:53,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:53,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705907566] [2021-07-13 20:48:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:53,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:53,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705907566] [2021-07-13 20:48:53,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705907566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:53,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449426031] [2021-07-13 20:48:53,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:53,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:53,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:48:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:54,194 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 20:48:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:54,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449426031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:54,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:54,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:48:54,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897211010] [2021-07-13 20:48:54,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:54,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:54,206 INFO L87 Difference]: Start difference. First operand 152595 states and 446277 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:55,937 INFO L93 Difference]: Finished difference Result 181164 states and 526188 transitions. [2021-07-13 20:48:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:48:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:48:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:56,615 INFO L225 Difference]: With dead ends: 181164 [2021-07-13 20:48:56,616 INFO L226 Difference]: Without dead ends: 181122 [2021-07-13 20:48:56,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:48:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181122 states. [2021-07-13 20:49:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181122 to 150609. [2021-07-13 20:49:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150609 states, 150608 states have (on average 2.9200042494422607) internal successors, (439776), 150608 states have internal predecessors, (439776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150609 states to 150609 states and 439776 transitions. [2021-07-13 20:49:01,269 INFO L78 Accepts]: Start accepts. Automaton has 150609 states and 439776 transitions. Word has length 43 [2021-07-13 20:49:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:01,269 INFO L482 AbstractCegarLoop]: Abstraction has 150609 states and 439776 transitions. [2021-07-13 20:49:01,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 150609 states and 439776 transitions. [2021-07-13 20:49:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:01,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:01,894 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:02,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-07-13 20:49:02,094 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:02,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1227535658, now seen corresponding path program 195 times [2021-07-13 20:49:02,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:02,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786955593] [2021-07-13 20:49:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:02,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:02,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786955593] [2021-07-13 20:49:02,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786955593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:02,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215883968] [2021-07-13 20:49:02,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:02,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:49:02,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:02,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:02,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215883968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:02,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:02,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:49:02,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346593953] [2021-07-13 20:49:02,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:02,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:02,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:02,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:02,257 INFO L87 Difference]: Start difference. First operand 150609 states and 439776 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:03,425 INFO L93 Difference]: Finished difference Result 155661 states and 452390 transitions. [2021-07-13 20:49:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:49:03,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:03,905 INFO L225 Difference]: With dead ends: 155661 [2021-07-13 20:49:03,905 INFO L226 Difference]: Without dead ends: 155633 [2021-07-13 20:49:03,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1197, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:49:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155633 states. [2021-07-13 20:49:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155633 to 150007. [2021-07-13 20:49:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150007 states, 150006 states have (on average 2.9199165366718667) internal successors, (438005), 150006 states have internal predecessors, (438005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150007 states to 150007 states and 438005 transitions. [2021-07-13 20:49:08,141 INFO L78 Accepts]: Start accepts. Automaton has 150007 states and 438005 transitions. Word has length 43 [2021-07-13 20:49:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:08,141 INFO L482 AbstractCegarLoop]: Abstraction has 150007 states and 438005 transitions. [2021-07-13 20:49:08,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 150007 states and 438005 transitions. [2021-07-13 20:49:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:08,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:08,406 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:08,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:08,607 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2085759072, now seen corresponding path program 196 times [2021-07-13 20:49:08,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:08,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047925642] [2021-07-13 20:49:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:08,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:08,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047925642] [2021-07-13 20:49:08,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047925642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254898007] [2021-07-13 20:49:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:08,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:08,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:08,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:08,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:08,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254898007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:08,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:08,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:49:08,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965691192] [2021-07-13 20:49:08,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:08,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:08,769 INFO L87 Difference]: Start difference. First operand 150007 states and 438005 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:09,972 INFO L93 Difference]: Finished difference Result 159439 states and 462442 transitions. [2021-07-13 20:49:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:49:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:10,690 INFO L225 Difference]: With dead ends: 159439 [2021-07-13 20:49:10,690 INFO L226 Difference]: Without dead ends: 159383 [2021-07-13 20:49:10,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:49:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159383 states. [2021-07-13 20:49:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159383 to 150395. [2021-07-13 20:49:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150395 states, 150394 states have (on average 2.918208173198399) internal successors, (438881), 150394 states have internal predecessors, (438881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150395 states to 150395 states and 438881 transitions. [2021-07-13 20:49:14,863 INFO L78 Accepts]: Start accepts. Automaton has 150395 states and 438881 transitions. Word has length 43 [2021-07-13 20:49:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:14,863 INFO L482 AbstractCegarLoop]: Abstraction has 150395 states and 438881 transitions. [2021-07-13 20:49:14,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 150395 states and 438881 transitions. [2021-07-13 20:49:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:15,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:15,108 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:15,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:15,308 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash -520000026, now seen corresponding path program 197 times [2021-07-13 20:49:15,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:15,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419915151] [2021-07-13 20:49:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:15,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:15,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419915151] [2021-07-13 20:49:15,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419915151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:15,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730323561] [2021-07-13 20:49:15,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:15,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:49:15,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:15,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:15,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730323561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:15,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:15,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 20:49:15,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719891598] [2021-07-13 20:49:15,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:15,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:15,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:15,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:15,471 INFO L87 Difference]: Start difference. First operand 150395 states and 438881 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:17,018 INFO L93 Difference]: Finished difference Result 165101 states and 478609 transitions. [2021-07-13 20:49:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:49:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:17,538 INFO L225 Difference]: With dead ends: 165101 [2021-07-13 20:49:17,538 INFO L226 Difference]: Without dead ends: 164975 [2021-07-13 20:49:17,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 517.0ms TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:49:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164975 states. [2021-07-13 20:49:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164975 to 146399. [2021-07-13 20:49:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146399 states, 146398 states have (on average 2.9183936939029222) internal successors, (427247), 146398 states have internal predecessors, (427247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146399 states to 146399 states and 427247 transitions. [2021-07-13 20:49:21,447 INFO L78 Accepts]: Start accepts. Automaton has 146399 states and 427247 transitions. Word has length 43 [2021-07-13 20:49:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:21,447 INFO L482 AbstractCegarLoop]: Abstraction has 146399 states and 427247 transitions. [2021-07-13 20:49:21,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 146399 states and 427247 transitions. [2021-07-13 20:49:22,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:22,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:22,056 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:22,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:22,257 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1221099582, now seen corresponding path program 198 times [2021-07-13 20:49:22,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:22,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331237201] [2021-07-13 20:49:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:22,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:22,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331237201] [2021-07-13 20:49:22,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331237201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:22,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783904581] [2021-07-13 20:49:22,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:22,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:49:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:22,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:22,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:22,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783904581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:22,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:22,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 20:49:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866248131] [2021-07-13 20:49:22,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:22,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:22,427 INFO L87 Difference]: Start difference. First operand 146399 states and 427247 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:23,932 INFO L93 Difference]: Finished difference Result 159052 states and 460743 transitions. [2021-07-13 20:49:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:49:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:24,605 INFO L225 Difference]: With dead ends: 159052 [2021-07-13 20:49:24,605 INFO L226 Difference]: Without dead ends: 159052 [2021-07-13 20:49:24,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=696, Invalid=1854, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:49:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159052 states. [2021-07-13 20:49:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159052 to 148487. [2021-07-13 20:49:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148487 states, 148486 states have (on average 2.9170763573670246) internal successors, (433145), 148486 states have internal predecessors, (433145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148487 states to 148487 states and 433145 transitions. [2021-07-13 20:49:28,591 INFO L78 Accepts]: Start accepts. Automaton has 148487 states and 433145 transitions. Word has length 43 [2021-07-13 20:49:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:28,591 INFO L482 AbstractCegarLoop]: Abstraction has 148487 states and 433145 transitions. [2021-07-13 20:49:28,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 148487 states and 433145 transitions. [2021-07-13 20:49:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:29,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:29,231 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:29,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:29,431 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash -707378348, now seen corresponding path program 199 times [2021-07-13 20:49:29,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:29,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162808145] [2021-07-13 20:49:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:29,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:29,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162808145] [2021-07-13 20:49:29,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162808145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:29,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519685831] [2021-07-13 20:49:29,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:29,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519685831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:29,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:29,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 20:49:29,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281813936] [2021-07-13 20:49:29,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:29,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:29,597 INFO L87 Difference]: Start difference. First operand 148487 states and 433145 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:30,953 INFO L93 Difference]: Finished difference Result 159385 states and 462693 transitions. [2021-07-13 20:49:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:49:30,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:31,672 INFO L225 Difference]: With dead ends: 159385 [2021-07-13 20:49:31,672 INFO L226 Difference]: Without dead ends: 159331 [2021-07-13 20:49:31,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=714, Invalid=1736, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:49:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159331 states. [2021-07-13 20:49:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159331 to 144883. [2021-07-13 20:49:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144883 states, 144882 states have (on average 2.909685123065667) internal successors, (421561), 144882 states have internal predecessors, (421561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144883 states to 144883 states and 421561 transitions. [2021-07-13 20:49:35,792 INFO L78 Accepts]: Start accepts. Automaton has 144883 states and 421561 transitions. Word has length 43 [2021-07-13 20:49:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:35,792 INFO L482 AbstractCegarLoop]: Abstraction has 144883 states and 421561 transitions. [2021-07-13 20:49:35,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 144883 states and 421561 transitions. [2021-07-13 20:49:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:36,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:36,023 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:36,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:36,225 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:36,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1899008642, now seen corresponding path program 200 times [2021-07-13 20:49:36,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:36,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022868748] [2021-07-13 20:49:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:36,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:36,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022868748] [2021-07-13 20:49:36,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022868748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:36,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978995249] [2021-07-13 20:49:36,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:36,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:36,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:36,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978995249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:36,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:36,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:49:36,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740269154] [2021-07-13 20:49:36,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:36,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:36,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:36,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:36,384 INFO L87 Difference]: Start difference. First operand 144883 states and 421561 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:37,877 INFO L93 Difference]: Finished difference Result 152117 states and 439871 transitions. [2021-07-13 20:49:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:49:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:38,303 INFO L225 Difference]: With dead ends: 152117 [2021-07-13 20:49:38,304 INFO L226 Difference]: Without dead ends: 152096 [2021-07-13 20:49:38,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:49:38,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152096 states. [2021-07-13 20:49:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152096 to 141841. [2021-07-13 20:49:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141841 states, 141840 states have (on average 2.907445008460237) internal successors, (412392), 141840 states have internal predecessors, (412392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141841 states to 141841 states and 412392 transitions. [2021-07-13 20:49:42,232 INFO L78 Accepts]: Start accepts. Automaton has 141841 states and 412392 transitions. Word has length 43 [2021-07-13 20:49:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:42,232 INFO L482 AbstractCegarLoop]: Abstraction has 141841 states and 412392 transitions. [2021-07-13 20:49:42,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 141841 states and 412392 transitions. [2021-07-13 20:49:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:42,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:42,460 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:42,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-07-13 20:49:42,661 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2125401656, now seen corresponding path program 201 times [2021-07-13 20:49:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:42,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712459798] [2021-07-13 20:49:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:42,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:42,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712459798] [2021-07-13 20:49:42,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712459798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:42,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89078233] [2021-07-13 20:49:42,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:42,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:49:42,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:42,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:42,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:42,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89078233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:42,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:42,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:49:42,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28863856] [2021-07-13 20:49:42,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:42,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:42,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:42,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:42,822 INFO L87 Difference]: Start difference. First operand 141841 states and 412392 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:44,524 INFO L93 Difference]: Finished difference Result 161424 states and 467068 transitions. [2021-07-13 20:49:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:49:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:44,997 INFO L225 Difference]: With dead ends: 161424 [2021-07-13 20:49:44,997 INFO L226 Difference]: Without dead ends: 161424 [2021-07-13 20:49:44,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=773, Invalid=1983, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:49:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161424 states. [2021-07-13 20:49:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161424 to 152725. [2021-07-13 20:49:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152725 states, 152724 states have (on average 2.9131898064482336) internal successors, (444914), 152724 states have internal predecessors, (444914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152725 states to 152725 states and 444914 transitions. [2021-07-13 20:49:49,473 INFO L78 Accepts]: Start accepts. Automaton has 152725 states and 444914 transitions. Word has length 43 [2021-07-13 20:49:49,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:49,473 INFO L482 AbstractCegarLoop]: Abstraction has 152725 states and 444914 transitions. [2021-07-13 20:49:49,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 152725 states and 444914 transitions. [2021-07-13 20:49:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:49,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:49,724 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:49,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:49,925 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1958868594, now seen corresponding path program 202 times [2021-07-13 20:49:49,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:49,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357743454] [2021-07-13 20:49:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:49,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:49,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357743454] [2021-07-13 20:49:49,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357743454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:49,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255948239] [2021-07-13 20:49:49,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:49,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:49,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:49,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:50,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255948239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:50,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:49:50,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909846661] [2021-07-13 20:49:50,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:50,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:50,085 INFO L87 Difference]: Start difference. First operand 152725 states and 444914 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:51,435 INFO L93 Difference]: Finished difference Result 161700 states and 469993 transitions. [2021-07-13 20:49:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:49:51,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:51,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:52,134 INFO L225 Difference]: With dead ends: 161700 [2021-07-13 20:49:52,134 INFO L226 Difference]: Without dead ends: 161688 [2021-07-13 20:49:52,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:49:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161688 states. [2021-07-13 20:49:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161688 to 156889. [2021-07-13 20:49:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156889 states, 156888 states have (on average 2.916564683086023) internal successors, (457574), 156888 states have internal predecessors, (457574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156889 states to 156889 states and 457574 transitions. [2021-07-13 20:49:56,403 INFO L78 Accepts]: Start accepts. Automaton has 156889 states and 457574 transitions. Word has length 43 [2021-07-13 20:49:56,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:56,403 INFO L482 AbstractCegarLoop]: Abstraction has 156889 states and 457574 transitions. [2021-07-13 20:49:56,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,403 INFO L276 IsEmpty]: Start isEmpty. Operand 156889 states and 457574 transitions. [2021-07-13 20:49:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:49:57,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:57,022 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:57,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-13 20:49:57,223 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:57,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1984318038, now seen corresponding path program 203 times [2021-07-13 20:49:57,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:57,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611074333] [2021-07-13 20:49:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:57,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:57,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611074333] [2021-07-13 20:49:57,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611074333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:57,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821988744] [2021-07-13 20:49:57,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:57,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:57,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821988744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:57,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:57,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:49:57,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527723720] [2021-07-13 20:49:57,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:57,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:57,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:57,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:57,374 INFO L87 Difference]: Start difference. First operand 156889 states and 457574 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:58,693 INFO L93 Difference]: Finished difference Result 164728 states and 477396 transitions. [2021-07-13 20:49:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:49:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:49:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:59,408 INFO L225 Difference]: With dead ends: 164728 [2021-07-13 20:49:59,408 INFO L226 Difference]: Without dead ends: 164714 [2021-07-13 20:49:59,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:49:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164714 states. [2021-07-13 20:50:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164714 to 154405. [2021-07-13 20:50:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154405 states, 154404 states have (on average 2.912994482008238) internal successors, (449778), 154404 states have internal predecessors, (449778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154405 states to 154405 states and 449778 transitions. [2021-07-13 20:50:03,537 INFO L78 Accepts]: Start accepts. Automaton has 154405 states and 449778 transitions. Word has length 43 [2021-07-13 20:50:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:03,537 INFO L482 AbstractCegarLoop]: Abstraction has 154405 states and 449778 transitions. [2021-07-13 20:50:03,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 154405 states and 449778 transitions. [2021-07-13 20:50:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:50:03,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:03,804 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:04,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-13 20:50:04,005 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:04,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1899919264, now seen corresponding path program 204 times [2021-07-13 20:50:04,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:04,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789528083] [2021-07-13 20:50:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:50:04,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:04,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789528083] [2021-07-13 20:50:04,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789528083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:04,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505015626] [2021-07-13 20:50:04,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:04,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:50:04,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:04,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:50:04,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:04,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505015626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:04,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:04,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:50:04,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948959106] [2021-07-13 20:50:04,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:04,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:04,494 INFO L87 Difference]: Start difference. First operand 154405 states and 449778 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:05,811 INFO L93 Difference]: Finished difference Result 184216 states and 535139 transitions. [2021-07-13 20:50:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:50:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:50:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:06,343 INFO L225 Difference]: With dead ends: 184216 [2021-07-13 20:50:06,343 INFO L226 Difference]: Without dead ends: 184160 [2021-07-13 20:50:06,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=342, Invalid=1064, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:50:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184160 states. [2021-07-13 20:50:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184160 to 157205. [2021-07-13 20:50:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157205 states, 157204 states have (on average 2.911999694664258) internal successors, (457778), 157204 states have internal predecessors, (457778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157205 states to 157205 states and 457778 transitions. [2021-07-13 20:50:10,769 INFO L78 Accepts]: Start accepts. Automaton has 157205 states and 457778 transitions. Word has length 43 [2021-07-13 20:50:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:10,769 INFO L482 AbstractCegarLoop]: Abstraction has 157205 states and 457778 transitions. [2021-07-13 20:50:10,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 157205 states and 457778 transitions. [2021-07-13 20:50:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:50:11,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:11,407 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:11,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:11,607 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:11,608 INFO L82 PathProgramCache]: Analyzing trace with hash -259881754, now seen corresponding path program 205 times [2021-07-13 20:50:11,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:11,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649841170] [2021-07-13 20:50:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:11,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:11,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649841170] [2021-07-13 20:50:11,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649841170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:11,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29935753] [2021-07-13 20:50:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:11,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:50:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:11,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29935753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:11,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:11,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-13 20:50:11,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705585110] [2021-07-13 20:50:11,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:50:11,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:11,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:50:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:50:11,768 INFO L87 Difference]: Start difference. First operand 157205 states and 457778 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:13,061 INFO L93 Difference]: Finished difference Result 187081 states and 542051 transitions. [2021-07-13 20:50:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:50:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:50:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:13,882 INFO L225 Difference]: With dead ends: 187081 [2021-07-13 20:50:13,882 INFO L226 Difference]: Without dead ends: 186983 [2021-07-13 20:50:13,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:50:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186983 states. [2021-07-13 20:50:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186983 to 163317. [2021-07-13 20:50:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163317 states, 163316 states have (on average 2.9129050429841534) internal successors, (475724), 163316 states have internal predecessors, (475724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163317 states to 163317 states and 475724 transitions. [2021-07-13 20:50:18,556 INFO L78 Accepts]: Start accepts. Automaton has 163317 states and 475724 transitions. Word has length 43 [2021-07-13 20:50:18,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:18,556 INFO L482 AbstractCegarLoop]: Abstraction has 163317 states and 475724 transitions. [2021-07-13 20:50:18,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand 163317 states and 475724 transitions. [2021-07-13 20:50:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:50:18,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:18,813 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:19,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-07-13 20:50:19,013 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1450380640, now seen corresponding path program 206 times [2021-07-13 20:50:19,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:19,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068015427] [2021-07-13 20:50:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:19,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:19,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068015427] [2021-07-13 20:50:19,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068015427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:19,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466026420] [2021-07-13 20:50:19,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:19,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:50:19,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:50:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466026420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:19,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:19,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:50:19,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732358516] [2021-07-13 20:50:19,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:50:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:19,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:50:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:50:19,186 INFO L87 Difference]: Start difference. First operand 163317 states and 475724 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:20,759 INFO L93 Difference]: Finished difference Result 189775 states and 549397 transitions. [2021-07-13 20:50:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:50:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:50:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:21,775 INFO L225 Difference]: With dead ends: 189775 [2021-07-13 20:50:21,775 INFO L226 Difference]: Without dead ends: 189635 [2021-07-13 20:50:21,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:50:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189635 states. [2021-07-13 20:50:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189635 to 169749. [2021-07-13 20:50:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169749 states, 169748 states have (on average 2.91423757570045) internal successors, (494686), 169748 states have internal predecessors, (494686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169749 states to 169749 states and 494686 transitions. [2021-07-13 20:50:26,443 INFO L78 Accepts]: Start accepts. Automaton has 169749 states and 494686 transitions. Word has length 43 [2021-07-13 20:50:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:26,443 INFO L482 AbstractCegarLoop]: Abstraction has 169749 states and 494686 transitions. [2021-07-13 20:50:26,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 169749 states and 494686 transitions. [2021-07-13 20:50:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:50:27,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:27,059 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:27,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-07-13 20:50:27,259 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:27,260 INFO L82 PathProgramCache]: Analyzing trace with hash -892705776, now seen corresponding path program 207 times [2021-07-13 20:50:27,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:27,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238901061] [2021-07-13 20:50:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:27,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:27,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238901061] [2021-07-13 20:50:27,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238901061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:27,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878076075] [2021-07-13 20:50:27,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:50:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:27,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:50:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:27,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878076075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:27,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:27,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:50:27,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542411423] [2021-07-13 20:50:27,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:50:27,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:50:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:50:27,429 INFO L87 Difference]: Start difference. First operand 169749 states and 494686 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:28,897 INFO L93 Difference]: Finished difference Result 186596 states and 539739 transitions. [2021-07-13 20:50:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:50:28,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:50:28,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:29,689 INFO L225 Difference]: With dead ends: 186596 [2021-07-13 20:50:29,689 INFO L226 Difference]: Without dead ends: 186596 [2021-07-13 20:50:29,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 460.3ms TimeCoverageRelationStatistics Valid=915, Invalid=2391, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:50:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186596 states. [2021-07-13 20:50:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186596 to 169751. [2021-07-13 20:50:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169751 states, 169750 states have (on average 2.914138438880707) internal successors, (494675), 169750 states have internal predecessors, (494675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169751 states to 169751 states and 494675 transitions. [2021-07-13 20:50:35,216 INFO L78 Accepts]: Start accepts. Automaton has 169751 states and 494675 transitions. Word has length 43 [2021-07-13 20:50:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:35,216 INFO L482 AbstractCegarLoop]: Abstraction has 169751 states and 494675 transitions. [2021-07-13 20:50:35,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 169751 states and 494675 transitions. [2021-07-13 20:50:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:50:35,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:35,499 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:35,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:35,705 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:35,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1473783590, now seen corresponding path program 208 times [2021-07-13 20:50:35,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:35,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878920641] [2021-07-13 20:50:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:36,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:36,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878920641] [2021-07-13 20:50:36,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878920641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:36,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012568095] [2021-07-13 20:50:36,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:36,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:50:36,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:36,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:50:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:36,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012568095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:36,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:36,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:50:36,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468156842] [2021-07-13 20:50:36,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:50:36,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:50:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:50:36,205 INFO L87 Difference]: Start difference. First operand 169751 states and 494675 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:37,557 INFO L93 Difference]: Finished difference Result 177965 states and 516688 transitions. [2021-07-13 20:50:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:50:37,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:50:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:38,306 INFO L225 Difference]: With dead ends: 177965 [2021-07-13 20:50:38,306 INFO L226 Difference]: Without dead ends: 177911 [2021-07-13 20:50:38,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 727.7ms TimeCoverageRelationStatistics Valid=891, Invalid=1971, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:50:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177911 states. [2021-07-13 20:50:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177911 to 168935. [2021-07-13 20:50:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168935 states, 168934 states have (on average 2.912906815679496) internal successors, (492089), 168934 states have internal predecessors, (492089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168935 states to 168935 states and 492089 transitions. [2021-07-13 20:50:42,827 INFO L78 Accepts]: Start accepts. Automaton has 168935 states and 492089 transitions. Word has length 43 [2021-07-13 20:50:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:42,827 INFO L482 AbstractCegarLoop]: Abstraction has 168935 states and 492089 transitions. [2021-07-13 20:50:42,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 168935 states and 492089 transitions. [2021-07-13 20:50:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:50:43,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:43,086 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:43,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:43,286 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 659124450, now seen corresponding path program 209 times [2021-07-13 20:50:43,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:43,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144019064] [2021-07-13 20:50:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:43,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:43,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144019064] [2021-07-13 20:50:43,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144019064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:43,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413756869] [2021-07-13 20:50:43,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:43,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:50:43,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:50:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:43,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413756869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:43,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:43,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:50:43,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076329010] [2021-07-13 20:50:43,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:43,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:43,438 INFO L87 Difference]: Start difference. First operand 168935 states and 492089 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:45,252 INFO L93 Difference]: Finished difference Result 189051 states and 547585 transitions. [2021-07-13 20:50:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:50:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:50:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:46,071 INFO L225 Difference]: With dead ends: 189051 [2021-07-13 20:50:46,071 INFO L226 Difference]: Without dead ends: 189037 [2021-07-13 20:50:46,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:50:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189037 states. [2021-07-13 20:50:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189037 to 171955. [2021-07-13 20:50:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171955 states, 171954 states have (on average 2.911284413273317) internal successors, (500607), 171954 states have internal predecessors, (500607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171955 states to 171955 states and 500607 transitions. [2021-07-13 20:50:51,166 INFO L78 Accepts]: Start accepts. Automaton has 171955 states and 500607 transitions. Word has length 43 [2021-07-13 20:50:51,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:51,166 INFO L482 AbstractCegarLoop]: Abstraction has 171955 states and 500607 transitions. [2021-07-13 20:50:51,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 171955 states and 500607 transitions. [2021-07-13 20:50:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:50:51,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:51,479 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:51,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:51,693 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash 282153296, now seen corresponding path program 210 times [2021-07-13 20:50:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:51,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075397308] [2021-07-13 20:50:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:51,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:51,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075397308] [2021-07-13 20:50:51,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075397308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:51,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640209552] [2021-07-13 20:50:51,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:51,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:50:51,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:50:51,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:51,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640209552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:51,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:51,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:50:51,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35546216] [2021-07-13 20:50:51,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:51,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:51,863 INFO L87 Difference]: Start difference. First operand 171955 states and 500607 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:53,638 INFO L93 Difference]: Finished difference Result 186309 states and 539083 transitions. [2021-07-13 20:50:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:50:53,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:50:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:54,206 INFO L225 Difference]: With dead ends: 186309 [2021-07-13 20:50:54,206 INFO L226 Difference]: Without dead ends: 186295 [2021-07-13 20:50:54,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=436, Invalid=1370, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:50:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186295 states. [2021-07-13 20:50:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186295 to 170597. [2021-07-13 20:50:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170597 states, 170596 states have (on average 2.9107130296138246) internal successors, (496556), 170596 states have internal predecessors, (496556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170597 states to 170597 states and 496556 transitions. [2021-07-13 20:50:59,580 INFO L78 Accepts]: Start accepts. Automaton has 170597 states and 496556 transitions. Word has length 43 [2021-07-13 20:50:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:59,580 INFO L482 AbstractCegarLoop]: Abstraction has 170597 states and 496556 transitions. [2021-07-13 20:50:59,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 170597 states and 496556 transitions. [2021-07-13 20:50:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:50:59,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:59,840 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:00,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-07-13 20:51:00,040 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash 232071986, now seen corresponding path program 211 times [2021-07-13 20:51:00,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:00,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287211337] [2021-07-13 20:51:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:00,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287211337] [2021-07-13 20:51:00,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287211337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699304593] [2021-07-13 20:51:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:00,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:51:00,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:00,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699304593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:00,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:00,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:51:00,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285139201] [2021-07-13 20:51:00,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:51:00,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:51:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:51:00,246 INFO L87 Difference]: Start difference. First operand 170597 states and 496556 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:01,855 INFO L93 Difference]: Finished difference Result 194197 states and 561282 transitions. [2021-07-13 20:51:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:51:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:51:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:02,414 INFO L225 Difference]: With dead ends: 194197 [2021-07-13 20:51:02,414 INFO L226 Difference]: Without dead ends: 194113 [2021-07-13 20:51:02,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=400, Invalid=1322, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:51:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194113 states. [2021-07-13 20:51:06,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194113 to 171143. [2021-07-13 20:51:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171143 states, 171142 states have (on average 2.9093793458064066) internal successors, (497917), 171142 states have internal predecessors, (497917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171143 states to 171143 states and 497917 transitions. [2021-07-13 20:51:07,321 INFO L78 Accepts]: Start accepts. Automaton has 171143 states and 497917 transitions. Word has length 43 [2021-07-13 20:51:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:07,321 INFO L482 AbstractCegarLoop]: Abstraction has 171143 states and 497917 transitions. [2021-07-13 20:51:07,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 171143 states and 497917 transitions. [2021-07-13 20:51:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:51:07,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:07,584 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:07,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:07,784 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1842591536, now seen corresponding path program 212 times [2021-07-13 20:51:07,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:07,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098310771] [2021-07-13 20:51:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:07,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:07,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098310771] [2021-07-13 20:51:07,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098310771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:07,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153110152] [2021-07-13 20:51:07,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:07,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:07,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:07,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:51:07,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:07,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153110152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:07,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:07,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-13 20:51:07,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958016301] [2021-07-13 20:51:07,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:51:07,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:51:07,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:51:07,939 INFO L87 Difference]: Start difference. First operand 171143 states and 497917 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:09,530 INFO L93 Difference]: Finished difference Result 199438 states and 574335 transitions. [2021-07-13 20:51:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:51:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:51:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:10,155 INFO L225 Difference]: With dead ends: 199438 [2021-07-13 20:51:10,155 INFO L226 Difference]: Without dead ends: 199340 [2021-07-13 20:51:10,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=374, Invalid=1266, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:51:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199340 states. [2021-07-13 20:51:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199340 to 171143. [2021-07-13 20:51:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171143 states, 171142 states have (on average 2.908783349499246) internal successors, (497815), 171142 states have internal predecessors, (497815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171143 states to 171143 states and 497815 transitions. [2021-07-13 20:51:15,196 INFO L78 Accepts]: Start accepts. Automaton has 171143 states and 497815 transitions. Word has length 43 [2021-07-13 20:51:15,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:15,196 INFO L482 AbstractCegarLoop]: Abstraction has 171143 states and 497815 transitions. [2021-07-13 20:51:15,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 171143 states and 497815 transitions. [2021-07-13 20:51:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:51:15,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:15,505 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:15,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-07-13 20:51:15,720 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash 55760282, now seen corresponding path program 213 times [2021-07-13 20:51:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:15,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153077438] [2021-07-13 20:51:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:51:15,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:15,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153077438] [2021-07-13 20:51:15,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153077438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:15,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703203142] [2021-07-13 20:51:15,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:51:15,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:51:15,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:51:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates...